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International Conference on Technology and Instrumentation in Particle Physics 2017(TIPP2017)

Asia/Shanghai
Beijing International Convention Center

Beijing International Convention Center

No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
Zhen An LIU (IHEP)
Description

The Technology and Instrumentation in Particle Physics 2017 (TIPP2017) conference will be held in Beijing, the capital of China, from May 22-26. TIPP2017 will be the fourth in this series of international conferences on detectors and instrumentation, held under the auspices of the International Union of Pure and Applied Physics (IUPAP). The TIPP conference series, a science-driven cross-disciplinary conference, started in Tsukuba, Japan in 2009 (TIPP 2009), with the second conference held in Chicago in 2011 (TIPP 2011), and the third in Amsterdam in 2014 (TIPP2014). The conference aims to provide a stimulating atmosphere for scientists and engineers from around the world to discuss the latest developments in the field. The program focus is on all areas of detector development and instrumentation in particle physics, astro-particle physics and closely related fields, in particular:

Accelerator-based high energy physics
Non-accelerator particle physics and particle astrophysics
Nuclear physics
Experiments with synchrotron radiation and neutrons
Instrumentation and monitoring of particle and photon beams
Applications in photon science, biology, medicine, and engineering


It is increasingly important for the field to form industrial partnerships that may lead to transformational new technologies. This medium-sized conference brings together experts from the scientific and industrial communities to discuss current work and to plan for the future. The conference will, as in the past, include plenary invited talks and parallel tracks with contributions outlining state-of-the-art developments in different areas. The program will cover the following areas in parallel tracks focusing on the main themes of sensors, experiments, data processing, emerging technologies, and applications to other fields:

Experimental detector systems
Gaseous detectors
Semiconductor detectors
Calorimeters
Particle identification
Photon detectors
Dark Matter Detectors
Neutrino Detectors
Astrophysics and space instrumentation
Front-end electronics and fast data transmission
Trigger and data acquisition systems
Machine Detector
Interface and beam instrumentation
Backend readout structures and embedded systems
Medical Imaging, security and other applications

Lets meet in the beautiful Beijing for a fruitful conference and we wish you a nice stay. 
 

Liu, Zhen-An 
On behalf of the Organization Team

Participants
  • Adi Bornheim
  • Adrian Fiergolski
  • Adriano Di Giovanni
  • Alan Cosimo Ruggeri
  • Alejandro Santos
  • Alessandra Camplani
  • Alessandro Thea
  • Alfredo Castaneda
  • Ali Murat Guler
  • ALLEN EFOSA
  • ALLEN EFOSA
  • Alviggi Mariagrazia
  • Anastasiia Velyka
  • Andre Zibell
  • Andrea Bizzeti
  • Andreas Düdder
  • Andreas Nurnberg
  • Angelo Cruciani
  • Antonio Amoroso
  • Ardavan Ghassemi
  • Artur Ukleja
  • Axel Kuonen
  • Axel König
  • Baiyang Bi
  • Balazs Voneki
  • Baochen Wang
  • Baojun YAN
  • Bayarto Lubsandorzhiev
  • Beatrice Mandelli
  • Benedikt Vormwald
  • Bo Yu
  • Boqun Wang
  • Boruo Xu
  • Branislav Ristic
  • Brian Foster
  • Bruna BERTUCCI
  • Bruno Lenzi
  • Burak Bilki
  • Carlos Abellan
  • Carlos Garcia Argos
  • Carsten Hast
  • Changqing Feng
  • Chao Li
  • CHENG Li
  • chengguang zhu
  • Chiara La Licata
  • Chiara Perrina
  • Chin-Tu CHEN
  • Chris Craven
  • Christian BOHM
  • Christian Faerber
  • Christian Kahra
  • christophe de La Taille
  • Chunhong Yan
  • Coralie Neubüser
  • Cunfeng Feng
  • Daniel Antrim
  • Daniel Coderre
  • Daniel Rodriguez Rodriguez
  • daniele vivolo
  • Davide Pedretti
  • Dejun Han
  • Dominic Gaisbauer
  • Dongxu Yang
  • Dongxu ZHAO Dongxu
  • Eva Sicking
  • Fabrice Le Goff
  • Fabrice Retiere
  • Fan Yang
  • FANBO MENG
  • Fares Djama
  • Feng GAO
  • Fengjiao Luo
  • Florian Pitters
  • Francesca Nessi-Tedaldi
  • Francesco Di Capua
  • Francesco Romeo
  • Francis Gagnon-Moisan
  • Fukun Tang
  • Gary Varner
  • Gerald Eigen
  • Gianantonio Pezzullo
  • Giulio Aielli
  • Giuseppe Codispoti
  • Grygorii Sokhrannyi
  • Grzegorz Zuzel
  • Guangqing Yan
  • Guofu Cao
  • Haiyi Jin
  • Han Zhao
  • Haoqi Lu
  • Harris Kagan
  • Hendrik Jansen
  • Hendrik VAN DER GRAAF
  • Hendrik Windel
  • Hongbin Liu
  • Hongkai Wang
  • Hongkui Lv
  • Hongyu ZHANG
  • Hua Ye
  • Hugo Delannoy
  • Huirong Qi
  • Iain Haughton
  • Igal Jaegle
  • imad laktineh
  • In-soo Lee
  • Irakli Keshelashvili
  • ivano sarra
  • James Milnes
  • Jason Mansour
  • jennifer thomas
  • jia 刘佳
  • Jian-Quan Jia
  • Jianbei Liu
  • Jike Wang
  • Jingbo Wang
  • Jingzhou ZHAO Jingzhou
  • jinhai li
  • Jinlong Zhang
  • Jinsheng Liu
  • Jochen Schwiening
  • Joern Lange
  • Johan Borg
  • JOHN BOATENG
  • Josef Frisch
  • Julien Fleury
  • Jun CAO
  • Junji Haba
  • Junjie Zhu
  • Junqi Xie
  • K.K. Gan
  • Kaile WEN
  • Katsuaki Tomoyori
  • Kazuhiko Hara
  • Kazuhiro HAYAMA
  • Kazuya Ogawa
  • Keishi Hosokawa
  • Kejun ZHU
  • Kenichi Takemasa
  • Ki Lie
  • Kodai Matsuoka
  • Koki Maekawa
  • Kuo Chia-Ming
  • Kyungeon CHOI,
  • Lambert Hu
  • Laura Cardani
  • Lehui Guo
  • Lei Zhang
  • Li Min
  • LIANG XIAO
  • Liangjian Wen
  • Lichao Tian
  • Lorenzo Cassina
  • Lorenzo Paolozzi
  • Louis Helary
  • Luigia Elisabetta Barberio
  • Magdalena Munker
  • Makoto Tabata
  • Marcel Demarteau
  • Marco Meschini
  • Masanobu Yonenaga
  • Mateus Vicente
  • Mathieu Benoit
  • Matthew Buckland
  • Maximilian Hils
  • mei xiao
  • Meng Wang
  • Miao He
  • Michele Bianco
  • Michele Cascella
  • Michele Piero Blago
  • Mikhail Danilov
  • min ran
  • Ming Zeng
  • Mingkai Yun
  • Mircea Bogdan
  • Mirela Angela Saizu
  • Miroslav Gabriel
  • Mitsutaka Nakao
  • Mohammad AlAnazi
  • Muhammad Farooq Ali
  • Mustafa Schmidt
  • Nan Li
  • Nicola Casali
  • Nicolaus Kratochwil
  • Ning Zhou
  • Nural Akchurin
  • Oleg Solovyanov
  • Paolo Durante
  • Paolo Fresch
  • Patrick Connor
  • Patrizia Barria
  • Paul Schuetze
  • Pawel Marciniewski
  • pin LV
  • Ping Chen
  • Qiang Wang
  • Qiang Wang
  • qiuju liqj@ihep.ac.cn
  • Qun OUYANG
  • Raffaele Giordano
  • Rainer Bartoldus
  • Ralf SPIWOKS
  • Ray Larsen
  • Ren Xiangxiang
  • Ren-Yuan Zhu
  • Riccardo Farinelli
  • Richard Bosmans
  • Rikutaro Yoshida
  • Roberto Guida
  • Roger Forty
  • Roman Dzhygadlo
  • Ryo Hashimoto
  • Ryo Yonamine
  • Ryoto Iwai
  • Ryutaro Nishimura
  • Salvatore Costa
  • Satoru Yamada
  • Satoshi Hasegawa
  • Satyanarayana Bheesette
  • Seema Bahinipati
  • Selma Conforti
  • Sen Qian
  • Sergey Ryzhikov
  • Shengli Liu
  • Shikma Bressler
  • Shinhong Kim
  • Shinji Ogawa
  • Shiyu LOU
  • Shoushan Zhang
  • Shuai Wang
  • Shuangxi Shen
  • Shun Ono
  • Shunichi Akatsuka
  • Shunji Kishimoto
  • Siyuan Ma
  • Stepan Vereschagin
  • Stergios Tsigaridas
  • Taikan Suehara
  • Tamas Almos Vami
  • Tamer Tolba
  • Thomas James
  • Ting Miao
  • Tobias Bode
  • Tomomi Kawaguchi
  • Tomoyuki Konno
  • Ulrich Uwer
  • Valerio Vagelli
  • Victor Andrei
  • Vincenzo Battista
  • Wang WANG Gang
  • Wang Yi
  • Wei Wang
  • Weigang yin
  • Weiguo Li
  • Wenli Zheng
  • Xianchao Huang
  • Xianyi Zhang
  • Xiaohui Li
  • Xiaojuan ZHOU Xiaojuan
  • xiaopan 姜小盼
  • Xiaoxue Han
  • Xiaoyan SHEN
  • Xilei Sun
  • Xinchou Lou
  • xiubo qin
  • Xiuku WANG
  • Yajing XING
  • yanchun wang
  • Yang LI
  • yang yu
  • YANG ZHOU
  • Yangfan ZHOU
  • Yasuo Arai
  • Yifang Wang
  • Yiming LI
  • Yinghua JIA Yinghua
  • Yinhong ZHANG
  • Yinong LIU
  • Yong Liu
  • Yongqiang Wang
  • Yota Kawamura
  • YU WANG
  • Yuguang Xie
  • Yuji Hotta
  • Yunpeng LU
  • Yuzhen Yang
  • Zhao Liu
  • Zhe Cao
  • Zhe Ning
  • Zhe Wang
  • Zhen-an Liu
  • ZHENG WANG Zheng
  • Zhenjie Li
  • Zhigang WANG
  • Zhonghua Qin
  • Zhou He
  • ZHU YUWEI
  • Ziyi Guo
  • 云龙 张
  • 光宇 张
  • 兰馨 马
  • 加丽 江
  • 子佳(Justin Lee) 李
  • 守智 席
  • 彦丽 陈
  • 心成 齐
  • 恒双 刘
  • 柯 韩
  • 树旺 崔
  • 毅超 马
  • 永鹏 张
  • 沁宇 吴
  • 海琼 张
  • 磊 张
  • 磊 郭
  • 莉 于
    • 2:00 PM 8:00 PM
      Registration 1st floor

      1st floor

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101

      Registration on site

    • 8:00 AM 9:00 AM
      Registration

      Registration on site

    • 9:00 AM 9:20 AM
      Opening Convenion hall No.2

      Convenion hall No.2

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Convener: Prof. Zhen-an LIU (IHEP, CAS)
      • 9:00 AM
        IHEP status 20m
        Speaker: Prof. Yifang WANG Yifang (IHEP)
        Slides
    • 9:20 AM 10:50 AM
      Plenary 1 Convention hall No.2

      Convention hall No.2

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Convener: Prof. Zhen-an LIU (IHEP, CAS)
      • 9:20 AM
        Detector challenges for high-energy e+e- colliders 45m Convention hall No.2

        Convention hall No.2

        Beijing International Convention Center

        No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
        Future high-energy e+e- colliders have the potential to perform high precision measurements, for example on the Higgs boson and the top quark. They will provide very accurate information that will complement LHC data, thereby offering significantly more insight into the open questions in particle physics. These scientific objectives put strong demands on the performance of the detectors under study for future e+e- colliders, comprising linear colliders (ILC, CLIC) as well as circular colliders (CEPC, FCC-ee). There is a long tradition of detector development for future linear colliders, which has focused on highly granular calorimetry, silicon-based vertex and tracking detectors or TPC. The presentation will comprise an overview and current status of these detector technology developments. The presentation will also assess the differences in experimental conditions between linear and circular colliders in the few-hundred GeV energy range, targeting Higgs and top physics, and the potential impact on the corresponding detector designs.
        Speaker: Eva Sicking (CERN)
        Slides
      • 10:05 AM
        Direct cosmic-ray measurements & Dark Matter search 45m
        An impressive wealth of results has been released in the last decade by space borne experiments based on state-of-the-art particle physics detector technologies. Direct cosmic ray measurements are finally entering in a “precision era” highlighting new and unexpected phenomena, which challenge the current understanding of cosmic ray acceleration and propagation in galaxy while looking towards new exotic sources, as Dark Matter. We will review the experimental approach in the last generation of direct CR experiments and discuss the latest results on charged cosmic rays with the main focus on the measurements more sensitive to Dark Matter signals.
        Speaker: Prof. Bruna Bertucci (University of Perugia)
        Slides
    • 10:50 AM 11:20 AM
      Tea Break 30m Corridor on the second floor

      Corridor on the second floor

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
    • 11:20 AM 12:20 PM
      Plenary 2 Convention hall No.2

      Convention hall No.2

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Convener: Prof. Christian BOHM (Stockholm U./PC)
      • 11:20 AM
        Detectors for electron ion colliders 30m
        Several plans for Electron-Ion Colliders (EIC) have been advanced around the world. In the US, the Nuclear Physics community, in its long range plan, has endorsed a US based EIC as its highest priority new construction after FRIB completion; R&D funds both for the accelerator and the detector are becoming available. I will discuss the considerations for an EIC detector and how they differ from other collider detectors and describe some of the existing detector concepts.
        Speaker: Dr Rikutaro Yoshida (JLAB)
        Slides
      • 11:50 AM
        Future applications in medical imaging 30m
        Medical physics, particle physics, astrophysics, and other major branches of physics share a very broad technology common platform in their research and development of the respective instrumentation in these fields. Medical imaging often benefits greatly from advances made in particle physics, especially in the area of radiation detection technologies. For example, silicon photomultiplier (SiPM), developed first by and for high energy physics, has enabled revolutionary changes and created new potentials for novel medical imaging system designs unattainable previously. Fast electronics and data sciences advances in particle physics have also facilitated many quantum leaps in new medical imaging systems development, their innovative uses and breakthrough applications. Medical imaging also provides an ideal prototype platform for the very-large scale system planning, design, construction, testing and validation. These interactive and synergistic advances present unique opportunities for innovative developments of novel systems and future applications in medical imaging, such as modular, compact, application-specific, transformable and other innovative system designs for multi-modality, quantitative, and combined structural and molecular imaging applications, especially those in positron emission tomography (PET), single-photon emission computed tomography (SPECT), X-ray computed tomography (CT), digital X-ray, etc.
        Speaker: Prof. Chin-Tu Chen (Chicago Univ.)
        Slides
    • 12:20 PM 2:00 PM
      Lunch 1h 40m Banquet Hall on the second floor (Beijing North Star Continental Grand Hotel)

      Banquet Hall on the second floor

      Beijing North Star Continental Grand Hotel

    • 2:00 PM 3:30 PM
      R1-Calorimeters(1) Room 305A

      Room 305A

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Gianantonio Pezzullo (INFN-PI) , Prof. Nural Akchurin (Texas Tech University)
      • 2:00 PM
        Design, status and perspectives for the Mu2e crystal calorimeter 18m
        The Mu2e experiment at Fermilab searches for the charged-lepton flavor violating neutrino-less conversion of a negative muon into an electron in the field of a aluminum nucleus. The dynamics of such a process is well modelled by a two-body decay, resulting in a mono-energetic electron with an energy slightly below the muon rest mass (104.967 MeV). If no events are observed in three years of running, Mu2e will set a limit on the ratio between the conversion rate and the capture rate Rμe of ≤ 6 × 10$^{−17}$ (@ 90% C.L.). This will improve the current limit by four orders of magnitude [1]. A very intense pulsed muon beam (∼ 10$^{10}$μ/ sec) is stopped on a target inside a very long solenoid where the detector is located. The Mu2e detector is composed of a tracker and an electromagnetic calorimeter and an external veto for cosmic rays surrounding the solenoid. The calorimeter plays an important role in providing excellent particle identification capabilities, a fast online trigger filter while aiding the track reconstruction capabilities. It should be able to keep functionality in an environment where the n, p and photon background from muon capture processes and beam flash events deliver a dose of 120 Gy/year in the hottest area. It will also need to work in 1 T axial magnetic field and a 10−4 torr vacuum. The calorimeter requirements are to provide a large acceptance for 100 MeV electrons and reach • a time resolution better than 0.5 ns @ 100 MeV; • an energy resolution O(10%) @ 100 MeV; • a position resolution of 1 cm. The calorimeter consists of two disks, each one made of 674 pure CsI crystals read out by two large area array 2×3 of UV-extended SiPM 6×6 mm2. A dedicated beam test has been performed at the Beam Test Facility (BTF) in Frascati (Italy) where a small calorimeter prototype, based on a 3×3 matrix of undoped CsI crystals 3×3×20 cm3 coupled with large area UV-extended MPPC from Hamamatsu, has been exposed to an electron beam in the energy range between 80 and 130 MeV. The analog signals have been acquired with a CAEN waveform digitization at 250 Ms/s. Time and energy resolution measurements have been performed using a low energy electron beam, in the range [80,120] MeV, and cosmic rays. We present result of the beam test analyses for the timing and energy resolution. For normal incidence, a time resolu- tion of ∼ 110 ps (250 ps) has been measured in the energy range around 100 MeV (20 MeV). The energy response has also been studied achieving an energy resolution of the order of about 7% @ 100 MeV as limited by energy leakage (due to the small calorimeter dimension) and by beam energy spread. Reasonable data and MC agreement is observed. Dependence of response a resolution as a function of the impinging angle are also presented. References [1] Mu2e Collaboration, Mu2e Technical Design Report, http://arxiv.org/abs/1501.05241, 2015
        Speaker: Gianantonio Pezzullo (I)
        Slides
      • 2:18 PM
        Applications of Very Fast Inorganic Crystal Scintillators in Future HEP Experiments 18m
        Future HEP experiments at the energy and intensity frontiers require fast inorganic crystal scintillators with excellent radiation hardness to face the challenges of unprecedented event rate and severe radiation environment. This paper reports recent progress in application of fast inorganic scintillators for future HEP experiments, such as thin LYSO crystals for a shashlik sampling calorimeter proposed for the CMS upgrade at HL-LHC, undoped CsI crystals for the Mu2e experiment at Fermilab and a rare earth doped BaF2 crystals for Mu2e-II. Applications of very fast crystal scintillators for Gigahertz hard X-ray imaging for the proposed Marie project at LANL will also be discussed.
        Speaker: Dr Ren-Yuan Zhu (Caltech)
        Slides
      • 2:36 PM
        Cerium-doped Fused-silica Fibers 18m
        We report on current research and development activities on cerium-doped fused-silica optical fibers intended for use in high-energy calorimetry, particle tracking, beam monitoring, dosimetry, and myriad other applications outside particle physics. We have partnered with the specialty fibers industry leader Polymicro Technologies and produced several scintillating and wavelength shifting fibers with an eye towards achieving exceptional radiation-hardness above and beyond what is available today. We present results from beam tests on light yield, pulse shape, attenuation length, and light propagation speeds. We also discuss the results from extensive gamma irradiation tests and the lessons learned.
        Speaker: Prof. Nural Akchurin (Texas Tech University)
        Slides
      • 2:54 PM
        Liquid xenon detector with VUV-sensitive MPPCs for MEG II experiment 18m
        The MEG II experiment is an upgrade of the MEG experiment to search for the charged lepton flavor violating decay of muon, $\mu^+ \rightarrow e^+ \gamma$. The MEG II experiment is expected to reach a branching ratio sensitivity of $4 \times 10^{-14}$ , which is one order of magnitude better than the sensitivity of the current MEG experiment. The resolutions of the all detectors will be improved by a factor of 2, to cope with the increased beam rate in MEG II. The performance of the liquid xenon (LXe) γ-ray detector will be greatly improved with a highly granular scintillation readout realized by replacing 216 photomultiplier tubes (PMTs) on the γ-ray entrance face with 4092 Multi-Pixel Photon Counters (MPPCs). For this purpose, we have developed a new type of MPPC which is sensitive to the LXe scintillation light in vacuum ultraviolet (VUV) range, in collaboration with Hamamatsu Photonics K.K. The MPPC has been tested, and an excellent performance has been confirmed including high photon detection efficiency (> 15%) for LXe scintillation light. Based on the measured properties of the MPPC, an excellent performance of the LXe detector has been confirmed by Monte Carlo simulation. The construction and the commissioning of the detector is in progress. The performance of the VUV-sensitive MPPC will be reported, as well as the preliminary results during the detector commissioning.
        Speaker: Shinji Ogawa (T)
        Slides
      • 3:12 PM
        Development of Radiation-Hard Scintillators and Wavelength Shifting Fibers 18m
        We have been performing research on the radiation-hard active media for calorimetry by exploring intrinsically radiation-hard materials and their mixtures. The first samples we probed were Polyethylene Naphthalate (PEN), Polyethylene Terephthalate (PET) and thin sheets of HEM. These materials have been reported to have promising performance under high radiation conditions. Recently, we developed a new scintillator material doping Peroxide-cured polysiloxane bases with the primary fluors p-terphenyl (pTP), p-quarterphenyl (pQP), or 2.5-Diphenyloxazole (PPO) and/or the secondary fluors 3-HF or bis-MSB. The scintillation yield of the pTP/bis-MSB sample was compared to a BGO crystal and was measured to yield roughly 50% better light production compared to the BGO crystal. Various scintillator tiles were exposed to the gammas from a 137Cs source at the University of Iowa Hospitals and Clinics up to 1 and 10 MRad. The results are within expectations and exhibit sufficiently high performance for implementations in the future/upgrade hadron/lepton collider detectors. We have also identified materials with proven radiation resistance, long Stokes shifts to enable long self-absorption lengths, with decay constants ~10 ns or less for development of radiation-hard wavelength shifting fibers. Here we report on the recent advancements in the development and testing of radiation-hard scintillators and wavelength shifting fibers and discuss possible future implementations.
        Speaker: Burak Bilki (U)
        Slides
    • 2:00 PM 3:30 PM
      R2-Neutrino Detectors(1) Room 305C

      Room 305C

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Jingbo Wang (University of California, Davis) , Michele Cascella (University College London)
      • 2:00 PM
        Design of the Single Phase Liquid ArgonTPC for ProtoDUNE 18m
        The Deep Underground Neutrino Experiment (DUNE) will use a large liquid argon (LAr) detector to measure the CP violating phase, determine the neutrino mass hierarchy and perform precision tests of the three-flavor paradigm in long-baseline neutrino oscillations. It will also allow sensitive searches for proton decay and the detection and measurement of electron neutrinos from core collapse supernovae. In the DUNE far detector, four modules with fiducial mass of 10kton each are planned. Since each module represents a large leap from the current LArTPCs of 102 ton mass, DUNE is constructing kiloton scale engineering prototypes at CERN to validate the design, fabrication, installation and operation of the full scale detector components. In addition to the engineering studies, charged particle beam tests will also be conducted in these prototypes to provide precision measurements of the detector response to different particle species and energies. ProtoDUNE-SP is the prototype of the single phase liquid argon TPC. It has an active volume of approximately 7.2x7x6m3, constructed with components intended for the larger far detector. Due to the large scale, and underground siting of the far detector, great emphasis was placed on the detector cost, reliability and ease of installation. A modular TPC design is the key to achieve these goals. The DUNE-SP TPC is constructed from hundreds of pre-fabricated and tested TPC modules with unique features: - The anode plane assemblies (APAs) can be tiled on 3 sides with virtually no dead space; - The cathode plane assemblies (CPAs) use all resistive material to improve high voltage safety; - The field cage modules are designed to both mechanically and electrically modular. Details of the design, fabrication and testing will be presented.
        Speaker: Bo Yu (B)
        Slides
      • 2:18 PM
        Design and Construction of the Short-Baseline Near Detector (SBND) at Fermilab 18m
        The Short-Baseline Near Detector (SBND) is one of the three detectors in Fermilab's short-baseline neutrino physics program which is projected to start collecting data in 2019. SBND is to measure the un-oscillated beam flavor composition to enable precision searches for neutrino oscillations via both electron neutrino appearance and muon neutrino disappearance in the far detectors. The core component of SBND detector is based on the Liquid Argon TPC (LArTPC) technology. The design and construction of SBND serves also an important role in the on-going R&D efforts within neutrino physics to develop the LArTPC technology toward many-kiloton-scale detectors for next generation long-baseline neutrino oscillation experiments. In this talk, we will present SBND design and construction progress and challenges together with the project schedule.
        Speaker: Dr Ting Miao (Fermilab)
        Slides
      • 2:36 PM
        Latest results from the NEMO-3 and SuperNEMO experiments 18m
        Neutrinoless double-beta decay, if observed, would be proof that the neutrino is its own antiparticle, would be evidence for total lepton number violation, and could allow a measurement of the absolute neutrino mass. Tracking calorimeter experiments have particular strengths, including the ability to search for neutrinoless double-beta decay amongst several different isotopes hosted in source foils. Full event reconstruction provides powerful background rejection capability, and, in the event of a discovery, topological measurements are a powerful handle to determine the nature of the lepton number violating process. I will present the latest results from the NEMO-3 experiment together with the current status and future prospects for its successor: SuperNEMO.
        Speaker: Michele Cascella (U)
        Slides
      • 2:54 PM
        PROSPECT - A Precision Reactor Oscillation and Spectrum Experiment 18m
        PROSPECT, the Precision Reactor Oscillation and SPECTrum Experiment, is a multi-phased short baseline reactor antineutrino experiment aims to precisely measure the antineutrino spectrum of Highly Enriched U-235 (HEU) reactor and probe the possible neutrino oscillation that involves ∆m2 1 eV scale sterile neutrino. In PROSPECT phase-I, an 14 × 11 optically segmented Li-6 loaded liquid scintillator (LiLS) detector will be deployed at 7-12m from the High Flux Isotope Reactor (HFIR) at Oak Ridge National Lab (ORNL). PROSPECT is able to measure the spectrum of U-235 to aid the inconsistent between predictive spectral models and latest experimental measurements of reactor antineutrino spectrum within 2 reactor cycles. The oscillation measurement will search the best fit region of sterile neutrino in 1-year data taking. This talk will detail the design of PROSPECT's novel lithium-loaded liquid scintillator-based detector, performance of existing PROSPECT prototypes, and the status of the production detector's construction.
        Speakers: Littlejohn Bryce (Illinois Institute of Technology) , Mr Xianyi Zhang (IIT)
        Slides
      • 3:12 PM
        Discussion time 18m
    • 2:00 PM 3:30 PM
      R3-Trigger and data acquisition systems(1) Room 305E

      Room 305E

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Louis Helary (CERN) , Ralf SPIWOKS (CERN)
      • 2:00 PM
        Commissioning and integration testing of the DAQ system for the CMS GEM upgrade 18m
        The CMS muon system will undergo a series of upgrades in the coming years to preserve and extend its muon detection capabilities during the High Luminosity LHC. The first of these will be the installation of triple-foil GEM detectors in the CMS forward region with the goal of maintaining trigger rates and preserving good muon reconstruction, even in the expected harsh environment. In 2017 the CMS GEM project is looking to achieve a major milestone in the project with the installation of 5 super-chambers in CMS; this exercise will allow for the study of services installation and commissioning, and integration with the rest of the subsystems for the first time. An overview of the DAQ system will be given with emphasis on the usage during chamber quality control testing, commissioning in CMS, and integration with the central CMS system.
        Speaker: Alfredo Castaneda (T)
        Slides
      • 2:18 PM
        MiniDAQ1: a compact data acquisition system for GBT readout over 10G Ethernet 18m
        The LHCb experiment at CERN is undergoing a significant upgrade in anticipation of the increased luminosity that will be delivered by the LHC during Run 3 (starting in 2021). In order to allow efficient event selection in the new operating regime, the upgraded LHCb experiment will have to operate in continuous readout mode and deliver all 40MHz of particle collisions directly to the software trigger. In addition to a completely new readout system, the front-end electronics for most sub-detectors are also to be redesigned in order to meet the required performance. All front-end communication is based on a common ~5Gbps radiation-hard protocol developed at CERN, called GBT. MiniDAQ1 is a complete data-acquisition platform developed by the LHCb collaboration for reduced-scale tests of the new front-end electronics. The hardware includes 36 bidirectional optical links and a powerful FPGA in a small AMC form-factor. The FPGA implements data acquisition and synchronization, slow control and fast commands on all available GBT links, using a very flexible architecture allowing front-end designers to experiment with various configurations. The FPGA also implements a bidirectional 10G Ethernet network stack, in order to deliver the data produced by the front-ends to a computer network for final storage and analysis. An integrated single-board-computer runs the new control system that is also being developed for the upgrade, this allows MiniDAQ1 users to interactively configure and monitor the status of the entire readout chain, from the front-end up to the final output. MiniDAQ1 hardware is currently finalized and successfully used by several sub-detector groups within the collaboration, work is currently well underway on MiniDAQ2, which will feature a high-throughput readout protocol based on PCI Express in place of Ethernet. Firmware and software have already been designed so as to minimize the effort required to transition from MiniDAQ1 to its successor, which implements the final design that will be commissioned in 2019.
        Speaker: Paolo Durante (CERN)
        Slides
      • 2:35 PM
        The Intelligent FPGA Data Acquisition Framework 18m
        The Intelligent FPGA Data Acquisition Framework (IFDAQ) is used for the development of the data acquisition systems. It provides a collection of IPcores needed to built entire data acquisition systems starting from a very simple stand-alone Time-to-Digital-Converter module to a large-scale DAQ including time distribution, slow control, data concentrators and event builders. The IPcore library consists of SERDES-based TDC with a resolution depending on the FPGA type (229 ps for the Artix7-1 speedgrade, 100 ps for the Virtex6-2 speedgrade), an ADC interface including data processing ([pedestal] determination, signal detection and time extraction using digital contstant fraction discrimination), a Unified Communication Framework (UCF), an event builder, and a slow control core. The UCF is an inter-FPGA communication protocol for high-speed serial interfaces. It provides up to 64 different communication channels via a single serial link. One channel is reserved for timing and trigger information, the other channels can be used for slow control interfaces and data transmission. All channels are bidirectional and share link bandwidth according to assigned priority. The timing channel distributes messages with fixed and deterministic latency in one direction. From this point of view the protocol implementation is asymmetrical. The framework supports point-to-point and star-like 1:n topologies. The star-like topology can be used for front-ends with low data rates and pure time-distribution systems. In this topology, the master broadcasts information according to assigned priority, the slaves communicate in a time-sharing manner to the master. The first applications of the IFDAQ is the upgrade of the drift detectors of the COMPASS experiment at CERN, the straw detectors of the dirft chambers of the NA64 experiment at CERN, and the read-out for the Belle II pixel detector at KEK in Japan.
        Speaker: Mr Dominic Gaisbauer (TU Muenchen)
        Slides
      • 2:54 PM
        Integration of data acquisition systems of Belle II outer-detectors for cosmic ray test 18m
        The Belle II experiment is scheduled to start in 2018 and the development of data acquisition (DAQ) system as well as its detector is ongoing. The target luminosity of SuperKEKB, an asymmetric electron-positron collider, is 8x10^35 cm-2s-1, which is 40 times larger than its predecessor, KEKB, and the construction of the DAQ system is challenging. The Belle II detector consists of seven sub-detectors. Frontend electronics for each sub-detector digitizes signals and sends the data to back-end readout boards. To reduce the cost of the development and achieve easier operation, these readout boards are common for all sub-detectors except for the innermost pixel detector. After the readout boards, the data then go through PC farms, where event building and online data-reduction by software trigger are performed, and are stored in a storage system. Currently, most of Belle II outer sub-detectors, including outer tracking detectors, calorimeters and a barrel particle identification detector, have been already installed in the Belle II detector and the integration of DAQ systems for the sub-detectors is in progress. Since the Belle II DAQ system is designed so that we can quickly change operation modes with a standalone sub-detector or combined ones, the DAQ system for is first tested with each sub-detector and then integrated to the combined DAQ system. Towards the global cosmic-ray commissioning with magnetic field in June 2017, we started data-taking of cosmic ray events with central drift chamber and electromagnetic calorimeter separately and the combined data-taking for those two detectors was also tested. We present the status of integration of the DAQ system for the installed sub-detectors.
        Speaker: Satoru Yamada (KEK)
        Slides
      • 3:12 PM
        Discussion time 18m
    • 2:00 PM 3:30 PM
      R4-Photon detectors(1) Room 307

      Room 307

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Prof. Gerald Eigen (University of Bergen) , Prof. Harry van der Graaf (Nikhef)
      • 2:00 PM
        Development of planar microchannel plate photomultiplier with full range response and pixelated readout 18m
        Planar microchannel plate photomultipliers (MCP-PMTs) with bialkali photocathodes are able to achieve single photon detection with excellent time (picosecond) and spatial (millimeter) resolution. They have recently drawn great interests in experiments requiring time of flight (TOF) measurement and/or Cherenkov imaging. Current MCP-PMTs have a response range of 300 nm – 600 nm, limited by the window transmission and cathode materials. By replacing the glass window with fused silica, the detection range can be dramatically extended from 300 nm to 170 nm, providing much more efficient Cherenkov radiation detection. The Argonne MCP-PMT detector group has recently designed and fabricated 6 cm x 6 cm MCP-PMTs with fused silica window. Initial characterization indicates that the fused silica window photomultipier exhibits a transit-time spread of 57 psec at single photoelectron detection mode and of 27 psec at multi photoelectron mode (100 photoelectrons). The MCP-PMTs was also tested at Fermilab test beam facility for its particle detection performance and rate capability, showing high rate capability up to 75 kHz/cm2, higher than the requirement for future electron-ion collider (EIC) experiment. Currently, the group is exploring the new MCP-PMT with pixelated readout. With a pixelated readout, the new MCP-PMT will provide better position resolution for various applications in different experiments such as Belle II and EIC. The progress on pixelated readout MCP-PMT production and characterization will also be presented and discussed in the presentation.
        Speaker: Dr Xie Junqi (Argonne National Laboratory)
        Slides
      • 2:18 PM
        Improvement of the MCP-PMT performance under a high count rate 18m
        We developed a square-shaped micro-channel-plate photomultiplier tube (MCP-PMT) for the TOP counter in the Belle II experiment in collaboration with Hamamatsu Photonics K.K. It has a time resolution about 30 ps for single photon detection, a large photocoverage of 23 mm square photocathode and a peak quantum efficiency greater than 28% at a wavelength around 360 nm. Those excellent time resolution and efficiency are essential for the TOP counter to reconstruct the Cherenkov image for particle identification. However a major concern of the MCP-PMT is deterioration of the photocathode, and thus drop of the quantum efficiency. That is caused by outgassing from the MCP, of which amount depends on the output charge from the MCP. The quantum efficiency of the initial prototype of the MCP-PMT dropped down to 80% of the beginning at an integrated output charge per photocathode area of only less than 0.1 C/cm$^2$. On the other hand, several C/cm$^2$ is expected for the MCP-PMTs on the TOP counter at 50 ab$^{-1}$ integrated luminosity even when the operation gain of the MCP-PMT is as low as $5\times10^5$. That is because the MCP-PMTs suffer from intensive photon hits of several MHz/PMT due to the beam background. Therefore extending the lifetime of the MCP-PMT was absolutely imperative. We took three steps of approaches to extend the lifetime: blocking the gas and ions from reaching the photocathode by a ceramic cap and an aluminum layer; adopting atomic layer deposition (ALD) technique to coat the MCP surface to prevent outgassing; applying some processes in production to reduce the residual gas on the MCP. By each step, we succeeded in extending the lifetime to about 1 C/cm$^2$, about 10 C/cm$^2$, and more than 13 C/cm$^2$, respectively. The detail of the measurement of the lifetime will also be shown in this presentation. There is another issue to use the MCP-PMT under such a high count rate: The time resolution of the MCP-PMT becomes worse above several MHz/PMT. The origin of the worse resolution is considered as a local distortion of the electric field in the MCP where the electrons are depleted. The fraction of the depleted region increases as the count rate because it takes $O$(10 ms) to recharge the fired micro channels of high resistance by the strip current. This presentation will cover test results of the time resolution under LED backgrounds as well as possible mitigation measures against the deterioration of the time resolution.
        Speaker: Kodai Matsuoka (KMI, Nagoya University)
        Slides
      • 2:36 PM
        The VSiPMT project: characterization of the second generation of prototypes 18m
        VSiPMT (Vacuum Silicon PhotoMultiplier Tube) is an innovative photodetector that matches the excellent photon counting performances of SiPMs with the large sensitive surfaces of standard PMTs. 
In such device, the photoelectrons generated by a large surface photocathode are accelerated and driven by an electrostatic focusing system towards a small focal area covered by a SiPM. This solution is expected to offer several important advantages with respect to standard PMTs technology (improved photon counting, faster time response, higher stability and a decreased power consumption), while keeping comparable values of gain and quantum efficiency.
 The project stands on a huge preliminary phase, mainly aimed at investigating the performances of SiPMs as electron detectors. The promising results of this work provided the proof of feasibility of the device and encouraged Hamamatsu Photonics at realizing a first generation of VSiPMT prototypes, based on the combination of a circular GaAsP photocathode (3 mm diameter) and a custom SiPM without optical entrance window. The extensive characterization of these devices provided results going far beyond the most optimistic expectations: excellent SPE resolution, easy low-voltage-based stability, very good time performances, high gain and good PDE are among the most outstanding achievements, counter-balanced by some drawbacks like a still high dark noise and lack of linearity. The success of this phase have boosted a further design effort, which resulted in the realization of a second generation of a VSiPMT prototypes with a 1-inch photocathode surface. The outstanding performances of such device make it an attractive solution for a potentially limitless field of applications, ranging from fundamental physics research to medical applications. In this work, the characterization of the second generation of VSiPMT prototypes will be described in detail, with a special focus on the adopted technological solutions and on the guidelines for a further engineering phase aimed at the realization of a next version of prototypes with an even larger photocathode surface.
        Speaker: daniele vivolo (I)
        Slides
      • 2:54 PM
        The cathode quantum efficiency(QE) Testing System 18m
        Photomultiplier tubes (PMTs), as a kind of light detector with high sensitivity and super fast time response, are widely used in physics experiment, industrial production, medical equipment and other fields. And With the increasingly common use of large area PMTs for nuclear and particle physics experiments, information on the uniformity of photocathode is important to accurate particle identification. Especially in the non-transfer cathode system during the cathode preparation, the antimony ball arrangement and cathode preparation technology always contribute non-uniformity of large area PMTs. A system studying the cathode performance of PMT has been built in our lab. These performance parameters such as quantum efficiency (QE) at specific wavelength, QE spectral response from 200 nm to1000 nm and cathode uniformity could be measured in this system. Because the size and shape of cathode vary with PMTs, three cathode uniformity scanning setups, one for 2-in PMTs ,another for 8-in PMTs, a third for 20-in PMTs were respectively built.
        Speaker: GAO Feng (IHEP)
        Paper
        Slides
      • 3:12 PM
        Discussion time 18m
    • 3:30 PM 4:00 PM
      Tea Break 30m Floor

      Floor

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
    • 4:00 PM 5:30 PM
      R1-Dark Matter Detectors Room 305A

      Room 305A

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Prof. Jin Li (IHEP/THU) , Murat Guler (METU)
      • 4:00 PM
        Development of a novel detector system for the keV sterile neutrino search with KATRIN 18m
        Sterile neutrinos are a well-motivated extension of the Standard Model of Particle Physics. They are experimentally accessible via the mixing with the known active neutrinos. A sterile neutrino with a mass of $\mathcal{O}$(keV) is a promising dark matter candidate possibly solving the too big to fail and the cusp vs core problem. In addition to astrophysical searches by X-ray telescopes, several laboratory measurement have been proposed. One is the TRISTAN project pursued in the framework of KATRIN. The KATRIN (KArsrluhe TRItium Neutrino Experiment) investigates the energy endpoint of the tritium beta-decay to determine the effective mass of the electron anti-neutrino with a precision of 200 meV (90$\,$% C.L.) after an effective data taking time of three years. The signature of a sterile neutrino would be a kink-like structure in the tritium beta-decay spectrum originating from the mixing with the active neutrino states. The TRISTAN project will proceed in two phases. Phase-0 will use the standard KATRIN setup. Whereas Phase-I will use a greatly improved detector system which will reduce systematics and allow a high count rate ($\mathcal{O}$(Mcps)) on the detector, increasing available statistics. This novel detector system will consist of $\mathcal{O}$(5000) silicon drift detectors (SDDs) with separate read-out and digitisation of each channel. To minimise the impact of electron backscattering on the spectrum the unavoidable inactive entrance window has to be thinned to below 30 nm. First measurements with a down-scaled prototype will be shown. In addition an overview of the two measurement phases and their respective experimental sensitivities will be given.
        Speaker: Tobias Bode (M)
        Slides
      • 4:18 PM
        XENON1T: Searching for WIMPs at the Ton Scale 18m
        The XENON collaboration seeks to measure WIMP-nucleon interactions using liquid xenon time projection chambers (TPCs). The experiment is a staged process, with the most recent iteration, XENON1T, currently in operation at the Gran Sasso National Laboratory in Italy. This TPC uses 3.5 tons of liquid xenon total and will achieve an unprecedented sensitivity to the WIMP-nucleon cross section with 2.0 tons of liquid xenon in the target. XENON1T has been in operation collecting science data since Fall 2016. This talk will present the latest updates from the first dark matter exposure.
        Speaker: Daniel Coderre (University of Bern)
        Slides
      • 4:36 PM
        Nuclear Emulsion Based Detector for Directional Dark Mater Search 18m
        Direct dark matter searches are promising techniques to identify the nature of dark matter particles. A variety of experiments have been developed over the past decades, aiming at detecting Weakly Interactive Massive Particles (WIMPs) via their scattering in a detector medium. Exploiting directionality would give a proof of the galactic origin of dark matter making it possible to provide a clear and unambiguous signal to background separation. In particular, the directionality appears as the only way to overcome the neutrino background that is expected to finally prevent standard techniques to further lower cross-section limits. The directional detection of Dark Matter requires very sensitive experiment combined with highly performing technology. The NEWSdm experiment, based on nuclear emulsions, is proposed to measure the direction of WIMP-induced nuclear recoils and it is expected to produce a prototype in 2017. We discuss the discovery potential of a directional experiment based on the use of a solid target made by newly developed nuclear emulsions and read-out systems reaching sub-micrometric resolution.
        Speaker: Prof. Murat GULER (METU)
        Slides
      • 4:54 PM
        Dark matter search with superconducting detector 18m
        WIMP dark matter search in GeV order mass range is led by xenon detectors. Moreover, searches for light (sub-GeV and MeV) dark matter are planning or ongoing with lighter target like silicon nucleus. We are planning an experiment to search dark matter up to keV mass region. To lower energy threshold, electrons in superconductor will be used as target. Energy gap of cooper-pair is enough small to observe keV dark matter recoils. Superconducting detector LEKID(Lumped Element Kinetic Inductance Detector) will be used for readout. Detector design, setup and commissioning will be performed. In this talk, experimental concept and status will be reported.
        Speaker: Keishi Hosokawa (Tohoku university)
        Slides
      • 5:12 PM
        PandaX-4ton liquid xenon detector for rare physics search 18m
        PandaX collaboration proposed a 4-ton liquid xenon detector to search for rare physics like dark matter and neutrino. The PandaX-4ton detector contains a TPC with a diameter of 1.2 m and a height of 1.2m. The TPC size is approximately doubled in every dimension from PandaX-II (500kg liquid xenon), presenting several technological challenges. With 6 ton-year exposure, the sensitivity to spin-independent WIMP-nucleon cross section is expected to reach 10^-47 cm2.
        Speaker: Ning Zhou (Shanghai Jiao Tong University)
        Slides
    • 4:00 PM 5:30 PM
      R2-Experimental detector systems(1) Room 305C

      Room 305C

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Gary Varner (University of Hawaii) , Dr qiang wang (ihep)
      • 4:00 PM
        Alignment of the CMS Tracker at LHC Run-II 18m
        The inner tracking detector of the Cosmic Muon Solenoid (CMS) at the CERN Large Hadron Collider (LHC) is $2.6\text{m}$ wide and $5.2\text{m}$ long, and is made of $1440$ silicon pixel and $15 148$ silicon strip modules in the inner and outer part, respectively. Its high granularity has provided an excellent hit resolution of the order of $10\mu\text{m}$ during LHC Run-I and II. In order to achieve such a precision despite the finite fabrication tolerances of the large structures and despite the changes of temperature and magnetic field, the tracking system needs to be aligned, i.e. a correction on the position, orientation and curvature needs to be computed for every single sensor. This challenging problem of $O(10^6)$ parameters can be solved using collision and cosmic-ray data by the MillePede II and HipPy algorithms, where the alignment parameters are determined by minimising the track-hit residuals of large samples of tracks. In this talk, we present the final alignment for 2016 data to illustrate the basic principles of those algorithms and to discuss some data-driven methods that are used to validate the performance of the alignment.
        Speaker: Patrick Connor (U)
        Slides
      • 4:18 PM
        Operational Experience with Radioactive Source Calibration of the CMS Hadron Endcap Calorimeter Wedges with Phase I Upgrade Electronics 18m
        The Phase I Upgrade of the CMS Hadron Endcap Calorimeters consist of new photodetectors (Silicon Photomultipliers in place of Hybrid Photo-Diodes ) and front-end electronics (QIE11). The upgrade will allow the elimination of the high amplitude noise and drifting response of the Hybrid Photo-Diodes, at the same time enabling the mitigation of the radiation damage of the scintillators and the wavelength shifting fibers with a larger spectral acceptance of the Silicon Photomultipliers. The upgrade will also allow to increase the longitudinal segmentation of the readout to be beneficial for pile-up mitigation and recalibration due to depth-dependent radiation damage. As a realistic operational exercise, the responses of the Hadron Endcap Calorimeter wedges are being calibrated with a 60Co radioactive source both with current and upgrade electronics. The exercise will provide a manifestation of the benefits of the upgrade. Here we describe the instrumentation details and the operational experiences related to the sourcing exercise.
        Speaker: Burak Bilki (U)
        Slides
      • 4:36 PM
        Thermal mockup studies of BelleII vertex detector 18m
        The Belle II experiment is currently under construction at the e+e- collider SuperKEKB in Japan. Its vertex detector (VXD), comprising a two layer DEPFET pixel detector (PXD) surrounded by four layers of double sided silicon strip detector (SVD), is indispensable for the accurate determination of the decay point of B or D mesons as well as track reconstruction of low momentum particles. In order to guarantee acceptable operation conditions for the VXD, the cooling system must be capable of removing a total heat load of about 1 kW from the very confined VXD volume. Evaporative two-phase CO2 cooling in combination with forced air flow has been chosen for the VXD cooling system. To verify and optimize the vertex detector cooling concept, a full-size VXD mockup is constructed at DESY. In this talk, thermal and mechanical studies of Belle II VXD mockup are presented.
        Speaker: Dr Hua Ye (DESY)
        Slides
      • 4:54 PM
        Developments on a Microchannel CO2 cooling system for the LHCb VELO Upgrade. 18m
        The LHCb Vertex Detector (VELO) will be upgraded in 2018 to a lightweight, pixel detector capable of 40 MHz readout and operation in very close proximity to the LHC beams. The thermal management of the system will be provided by evaporative CO2 circulating in micro channels embedded within thin silicon plates. This solution has been selected due to the excellent thermal efficiency, the absence of thermal expansion mismatch with silicon ASIC’s and sensors, the radiation hardness of CO2, and very low contribution to the material budget. Although micro channel cooling is gaining considerable attention for applications related to microelectronics, it is still a novel technology for particle physics experiments, in particular when combined with evaporative CO2 cooling. The R&D effort for LHCb is focusing on the design and layout of the channels together with a fluidic connector and its attachment which must withstand pressures up to 200 bars. This talk will describe the design and optimization of the cooling system for LHCb together with latest prototyping results. Even distribution of the coolant is ensured by means of the use of restrictions implemented before the entrance to a race-track layout of the main cooling channels. The coolant flow and pressure drop has been simulated together with the thermal performance of the device. The design of a suitable low mass connector, together with the soldering technique to the cooling plate will be described. Long term reliability as well as resistance to extremes of pressure and temperature is of prime importance. The setup and operation of a cyclic stress test of the prototype cooling channel designs will be described. In parallel to the development of the micro-channel substrate, the VELO group is also working on the development of an alternative cooling substrate. This design foresees a network of parallel stainless steel capillaries embedded within an aluminimum nitride cooling plate which forms the backbone of the module. A dedicated manifold supplies the CO2 via tiny orifices of 0.16 mm diameter which serve as an expansion point and control the resistance of the parallel channels. The design of the manifold and pipes and the thermal performance of full scale prototypes will be described. The efficiency of CO2 cooling in extracting the heat from the module will be shown for both implementations, as well as the potential integration into the module construction.
        Speaker: Kazuyoshi Akiba (IF-UFRJ)
      • 5:12 PM
        Discussion time 18m
    • 4:00 PM 5:30 PM
      R3-Backend readout structures and embedded systems Room 305E

      Room 305E

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Christian Bohm (Stockholm University) , christophe de La Taille (OMEGA)
      • 4:00 PM
        Phase-I Trigger Readout Electronics Upgrade for the ATLAS Liquid-Argon Calorimeters 18m
        The upgrade of the Large Hadron Collider (LHC) scheduled for shut-down period of 2018-2019, referred to as Phase-I upgrade, will increase the instantaneous luminosity to about three times the design value. Since the current ATLAS trigger system does not allow sufficient increase of the trigger rate, an improvement of the trigger system is required. The Liquid Argon (LAr) Calorimeter read-out will therefore be modified to use digital trigger signals with a higher spatial granularity in order to improve the identification efficiencies of electrons, photons, tau, jets and missing energy, at high background rejection rates at the Level-1 trigger. The new trigger signals will be arranged in 34000 so-called Super Cells which achieves 5-10 times better granularity than the trigger towers currently used and allows an improved background rejection. The readout of the trigger signals will process the signal of the Super Cells at every LHC bunch-crossing at 12-bit precision and a frequency of 40 MHz. The data will be transmitted to the back-end using a custom serializer and optical converter and 5.12 Gb/s optical links. In order to verify the full functionality of the future Liquid Argon trigger system, a demonstrator set-up has been installed on the ATLAS detector and is operated in parallel to the regular ATLAS data taking during the LHC Run-2. Noise level and linearity on the energy measurement have been verified to be within our requirements. In addition, we have collected data from 13 TeV proton collisions during the LHC 2015 run, and have observed real pulse from the detector through the demonstrator system. The talk will give an overview of the Phase-I Upgrade of the ATLAS Liquid Argon Calorimeter readout and present the custom developed hardware including their role in real-time data processing and fast data transfer. This contribution will also report on the performance of the newly developed ASICs including their radiation tolerance and on the performance of the prototype boards in the demonstrator system based on various measurements with the 13 TeV collision data. Results of the high-speed link test with the prototypes of the final electronic boards will be also reported.
        Speaker: Camplani Alessandra (Università degli Studi e INFN Milano)
        Paper
        Slides
      • 4:18 PM
        A Service-Oriented Platform for embedded monitoring systems in the Belle II experiment. 18m
        uSOP is a general purpose single board computer designed for deep embedded applications in control and monitoring of detectors, sensors, and complex laboratory equipment. In this paper, we present its deployment in the monitoring system framework of the ECL endcap calorimeter of the Belle2 experiment, presently under construction at the KEK Laboratory (Tsukuba, J). We discuss the main aspects of the hardware and software architectures tailored on the needs of a detector designed around CsI scintillators.
        Speaker: Dr Francesco Di Capua (Università Federico II di Napoli and INFN)
        Slides
      • 4:36 PM
        Integration of readout of the vertex detector in the Belle II DAQ system 18m
        The Belle II data acquisition system is one of the biggest challenges in the Belle II, a next generation of B factory, experiment, which is designed to collect data streams from the seven sub detectors with much higher trigger rate and larger data size up to 30 kHz and 30 GB/s at the level-1 trigger due to the 40 times higher luminosity of the Belle experiment. The Belle2Link, a common detector readout scheme using COPPER (common pipeline electronics readout) and HSLB (high speed link board) boards, was developed to handle data from the all sub detectors except for the PXD (pixel vertex detector) and then merge them to the HLT (high level trigger) PC farm while The DHH (Data Handling Hybrid), a dedicated readout system for the PXD with FPGA based data processing electronics has newly developed to handle with huge event size from the DEPFET ultra-fine pixel sensors. A reduction scheme of the pixel event size by selectin of RoIs (regions of interests) on the pixel surfaces is also developed based on online track reconstruction in the HLT farm using data from the SVD (silicon vertex detector) and the CDC (central drift chamber). Integration of readouts of the SVD and PXD, the inner vertex detectors, is ongoing for the phase II detector commissioning run using the first beam collisions from the SuperKEKB accelerator in parallel to the DAQ system operations for the outer sub detectors in the phase I cosmic ray run. The outer sub detectors are fully installed in the phase II run while the inner detectors are partially installed with dedicated background sensors to measure the beam background and confirm the radiation resistance in the phase III physics run with the full Belle II detector. In addition to the beam data taking, we will also operate several slow control systems; configuration of the detector readout electronics, the high voltage / low voltage power supplies, environment monitors, and cooperation with the SuperKEKB accelerator. Toward the phase II and III runs, we have been accumulating operation experiences of the inner vertex detector during three times of beam tests in the DESY electron test beam facility. There were a mount of issues to be tested; the establishment of the data links, the readout performances in the SVD-COPPERs and the PXD-DHHs, the online tracking for the RoI extraction and the slow control including the detector power supplies, and demonstration of the data taking shift by non-experts. The final beam test will be carried out in Feb. 2017 to finalize the sensor / readout systems and confirm our achievements. In this presentation, we will report the achievements in the integration of the Belle II DAQ system into the readouts of the vertex detectors based on the results in the final beam test. And then we will discuss prospects of the coming physics run in 2018.
        Speaker: Tomoyuki Konno (High energy accelerator research organization (KEK))
        Slides
      • 4:54 PM
        An analog processor for real time data filtering in large detectors 18m
        A decision making process requires to evaluate the saliency of data in a time scale short enough for the decision, to be useful in the ecosystem that generated the data. Experimental High Energy Physics pioneered in facing the problem of managing smartly and in real time big data, produced by detectors in the ns scale, and was always on the cutting edge in developing fast and complex electronic trigger systems exploiting the expected data model to perform the selection. Very large volume experiment searching for rare events such as DUNE (Deep Underground Neutrino Experiment) may produce an extremely high data flow, with a very reduced possibility of setting up an effective trigger, in particular when searching for cosmological events typically having a faint signature. Removing this bottleneck is a crucial challenge to extend the discovery potential of such experiments. We propose to overcome this limitation by introducing a novel technology, the WRM (Weighting Resistive Matrix) to perform a topological data driven selection. The WRM technique was originally invented as a fast topological trigger for hadron colliders experiment, and recently implemented as a fast engine for demanding computer vision applications. By treating DUNE data as projected grays-cale image we can exploit the WRM technology to provide a fast data driven trigger-less selection allowing a smart noise suppression on raw data in real time.
        Speaker: Giulio Aielli (U)
        Slides
      • 5:12 PM
        The SLAC Instrumentation and Control Platform 18m
        The SLAC Technology Innovation Directorate has developed a new electronics platform for instrumentation and control of particle accelerators and experiments. This “Common Platform” system is based on the Advanced Telecommunication Computing Architecture , and uses the ATCA shelf backplane for data, management, precision timing and machine interlocking. Local interface and data processing is provided by FPGAs on each ATCA card, each interfaced to ADCs, DACs, network and front end electronics. This “Common Platform” will be used as the primary accelerator control and instrumentation system for future SLAC accelerators including LCLS-II X-ray FEL, as well as for many experiment sub-systems. It is also being developed for use for superconducting sensors for a CMB telescope and a variety of other projects.
        Speaker: Josef Frisch (S)
        Slides
    • 4:00 PM 5:30 PM
      R4-Semiconductor detectors(1) Room 307

      Room 307

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Carlos Garcia Argos (University of Freiburg) , Prof. Kazuhiko Hara (University of Tsukuba)
      • 4:00 PM
        Construction of the Phase I upgrade of the CMS pixel detector 18m
        The innermost layers of the CMS tracker are built out of pixel detectors arranged in three barrel layers (BPIX) and two forward disks in each endcap (FPIX). The original CMS detector was designed for the nominal instantaneous LHC luminosity of 1 x 10^34 cm^-2 s^-1. Under the conditions expected in the coming years, which will see an increase of a factor two of the instantaneous luminosity, the CMS pixel detector will see a dynamic inefficiency caused by data losses due to buffer overflows. For this reason the CMS Collaboration has installed during the recent extended end of year shutdown a replacement pixel detector. The Phase I upgrade of the CMS pixel detector will operate at full efficiency at an instantaneous luminosity of 2 x 10^34 cm^-2 s^-1 with increased detector acceptance and additional redundancy for the tracking, while at the same time reducing the material budget. These goals are achieved using a new readout chip and modified powering and readout schemes, one additional tracking layer both in the barrel and in the disks, and new detector supports including a CO2 based evaporative cooling system, that contribute to the reduction of the material in the tracking volume. This contribution will review the design and technological choices of the Phase I detector, with a focus on the challenges and difficulties encountered, as well as the lessons learned for future upgrades.
        Speaker: Benedikt Vormwald
        Slides
      • 4:18 PM
        Commissioning of the Phase I upgrade of the CMS pixel detector 18m
        The Phase I upgrade of the CMS pixel detector is built out of four barrel layers (BPIX) and three forward disks in each endcap (FPIX). It comprises a total of 124M pixel channels, in 1,856 modules and it is designed to withstand instantaneous luminosities of up to 2 x 10^34 cm^-2 s^-1. Different parts of the detector have been assembled over the last year and later brought to CERN for installation inside the CMS tracker. At various stages during the assembly tests have been performed to ensure that the readout and power electronics, and the cooling system meet the design specifications. After tests of the individual components, system tests have been performed before the installation inside CMS. In addition to reviewing these tests, we also present results from the final commissioning of the detector in-situ using the central CMS DAQ system, as well as results from cosmic rays data, in preparation for the data taking in pp collisions.
        Speaker: Benedikt Vormwald (U)
        Slides
      • 4:36 PM
        Operational Experience with the ATLAS Pixel Detector 18m
        Run-2 of the LHC is providing new challenges to track and vertex reconstruction imposed by the higher collision energy, pileup and luminosity that are being delivered. The ATLAS tracking performance relies critically on the Pixel Detector, therefore, in view of Run-2 of LHC, the ATLAS experiment has constructed the first 4-layer Pixel detector in HEP, installing a new Pixel layer, also called Insertable B-Layer (IBL). Pixel detector was refurbished with a new service quarter panel to recover about 3% of defective modules lost during run-1 and an additional optical link per module was added to overcome in some layers the readout bandwidth limitation when LHC will exceed the nominal peak luminosity by almost a factor of 3. The key features and challenges met during the IBL project will be presented, as well as its operational experience and Pixel Detector performance in LHC.
        Speaker: Djama Fares (I)
        Slides
      • 4:54 PM
        TRACKING AND VERTEXING WITH THE ATLAS INNER DETECTOR IN THE LHC RUN2 AND BEYOND 18m
        Run-2 of the LHC has provided new challenges to track and vertex reconstruction with higher centre-of-mass energies and luminosity leading to increasingly high-multiplicity environments, boosted, and highly-collimated physics objects. To achieve this goal, ATLAS is equipped with the Inner Detector tracking system built using different technologies, silicon planar sensors (pixel and micro-strip) and gaseous drift- tubes, all embedded in a 2T solenoidal magnetic field.  In addition, the Insertable B-layer (IBL) is a fourth pixel layer, which was inserted at the centre of ATLAS during the first long shutdown of the LHC. An overview of the use of each of these subdetectors in track and vertex reconstruction, as well as the algorithmic approaches taken to the specific tasks of pattern recognition and track fitting, is given. The performance of the Inner Detector tracking and vertexing will be summarised. These include a factor of three reduction in the reconstruction time, optimisation for the expected conditions, novel techniques to enhance the performance in dense jet cores, time-dependent alignment of sub-detectors and special reconstruction of charged particle produced at large distance from interaction points. Moreover, data-driven methods to evaluate vertex resolution, fake rates, track reconstruction inefficiencies in dense environments, and track parameter resolution and biases will be shown. Luminosity increases in 2017 and beyond will also provide challenges for the detector systems and offline reconstruction, and strategies for mitigating the effects of increasing occupancy will be discussed.
        Speaker: Kyungeon CHOI, (ATLAS)
        Slides
      • 5:12 PM
        Operation of the LHCb silicon tracking and vertexing systems in LHC Run-2 18m
        The primary goal of the LHCb experiment at the LHC is to search for indirect evidence of new physics via measurements of CP violation and rare decays of beauty and charm hadrons. The LHCb detector is a single-arm forward spectrometer with precise silicon-strip detectors in the regions with highest particle occupancies. Around the interaction region, the VErtex LOcator (VELO) has active sensing elements as close as 8 mm from the LHC beams. The Silicon Tracker (ST) consists of a large-area detector located upstream of a dipole magnet, and three stations placed downstream of the magnet. Both detectors share the same front-end electronics, the Beetle chip. The detectors performed very well throughout LHC Run-1 but new operating conditions for Run-2 pose new challenges. In particular, the bunch separation has been reduced to 25 ns, which is the same order of magnitude as the shaping time of the front-end read-out amplifiers. Signal spill-over from adjacent bunch crossings has to be considered in the reconstruction of clusters and tracks. The centre-of-mass energy has also been increased leading to much higher particle multiplicities and increased radiation damage to the silicon sensors. The non-uniform exposure of the LHCb sensors makes it an ideal laboratory to study radiation damage effects in silicon detectors. The VELO sensors are exposed to fluences of the order of $5\times10^{13}$ 1-MeV neq/cm$^2$ per $fb^{-1}$ while the ST sensor are exposed to more moderate fluences of the order of $10^{12}$ 1 MeV neq/cm$^2$ per $fb^{-1}$. Several different methods are used to monitor the radiation damage. In particular, regular High Voltage scans are taken which allow a precise measurement of the charge collection efficiency (CCE) as function of the voltage. This analysis is used to determine the operational voltages, and allows to monitor any degradation in the detector performance. The overall performance of the VELO and ST during Run-2 will be presented. The results of the latest high voltage scans will be shown, and measurements of the effective depletion voltage will be compared with the expected values that are calculated using the Hamburg model. Several fits to the model will be shown that illustrate different annealing scenarios, related to maintenance activities of the cooling system that are evisaged in Run-2, and their impact on the operation of the detector during the remaining Run-2 data taking.
        Speaker: Vincenzo Battista
        Slides
    • 6:00 PM 8:00 PM
      Reception Lawn area

      Lawn area

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
    • 9:00 AM 10:30 AM
      R1-Calorimeters(2) Room 305A

      Room 305A

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Prof. Nural Akchurin (Texas Tech University) , Dr Ren-Yuan Zhu (Caltech)
      • 9:00 AM
        Digital Electromagnetic Calorimetry with Extremely Fine Spatial Segmentation 18m
        The CALICE Digital Hadron Calorimeter, the DHCAL, utilizes Resistive Plate Chambers, RPCs, as active media. The readout is provided by 1 cm x 1 cm pads with the front-end electronics directly coupled to the RPCs. The chambers including the readout are housed within a cassette structure with steel and copper front and back planes. The cassettes are interleaved with iron or tungsten absorber plates to incite hadronic and electromagnetic interactions. In special tests, the active layers of the DHCAL were exposed to low energy particle beams, without being interleaved by absorber plates. The thickness of each layer corresponded approximately to 0.29 radiation lengths or 0.034 nuclear interaction lengths. Here we report on the measurements performed with this device in the Fermilab test beam with positrons in the energy range of 1 to 10 GeV. The measurements provide unprecedented spatial detail of low energy electromagnetic interactions with a factor of approximately 5000 finer granularity compared to conventional electromagnetic calorimeters. The results are compared to simulations based on GEANT4 and a standalone program to emulate the detailed response of the active elements.
        Speaker: Burak Bilki (U)
        Slides
      • 9:18 AM
        Precision Timing Detectors with Cadmium Telluride Sensors 18m
        Precision timing detectors for high energy physics experiments with temporal resolutions of a few 10 ps are of pivotal importance to master the challenges posed by the highest energy particle accelerators. Calorimetric timing measurements have been a focus of recent research, enabled by exploiting the temporal coherence of electromagnetic showers. Scintillating crystals with high light yield as well as silicon sensors are viable sensitive materials for sampling calorimeters. Silicon sensors have very high effciency for charged particles. However, their sensitivity to photons, which comprise a large fraction of the electromagnetic shower, is limited. A large fraction of the energy in an electromagnetic shower is carried by photons. To enhance the efficiency of detecting photons, materials with higher atomic numbers than silicon are preferable. In this paper we present test beam measurements with a Cadmium-Telluride sensor as the active element of a secondary emission calorimeter with focus on the timing performance of the detector. A Schottky type Cadmium-Telluride sensor with an active area of 1 cm$^2$ and a thickness of 1 mm is used in an arrangement with tungsten and lead absorbers. Measurements are performed with electron beams in the energy range from 2 GeV to 200 GeV. A timing resolution of 20 ps is achieved under the best conditions.
        Speaker: Adi Bornheim (Caltech)
        Slides
      • 9:36 AM
        Prototype tests for a highly granular scintillator-based hadron calorimeter 18m
        Within the CALICE collaboration, several concepts for the hadronic calorimeter of a future linear collider detector are studied. After having demonstrated the capabilities of the measurement methods in "physics prototypes", the focus now lies on improving their implementation in "engineering prototypes", that are scalable to the full linear collider detector. The Analog Hadron Calorimeter (AHCAL) concept is a sampling calorimeter of tungsten or steel absorber plates and plastic scintillator tiles read out by silicon photomultipliers (SiPMs) as active material. The front-end chips are integrated into the active layers of the calorimeter and are designed for minimal power consumption (power pulsing). The versatile electronics allows the prototype to be equipped with different types of scintillator tiles and SiPMs. In recent beam tests, a prototype with ~3700 channels, equipped with several types of scintillator tiles and SiPMs, was exposed to electron, muon and hadron beams. The experience of these beam tests as well as the availability of new generation SiPMs with much reduced noise and better device-to-device uniformity resulted in an improved detector design with surface-mount SiPMs allowing for easier mass assembly. The presentation will discuss the testbeam measurements with AHCAL engineering prototype, the improved detector design and the ongoing construction of a large prototype for hadronic showers.
        Speaker: Yong Liu (D)
        Slides
      • 9:54 AM
        The CMS High-Granularity Calorimeter (HGCAL) for Operation at the High-Luminosity LHC 18m
        The High Luminosity LHC (HL-LHC) will integrate 10 times more luminosity than the LHC, posing significant challenges for radiation tolerance and event pileup on detectors, especially for forward calorimetry, and hallmarks the issue for future colliders. As part of its HL-LHC upgrade program, the CMS collaboration is designing a High Granularity Calorimeter to replace the existing endcap calorimeters. It features unprecedented transverse and longitudinal segmentation for both electromagnetic (ECAL) and hadronic (HCAL) compartments. This will facilitate particle-flow calorimetry, where the fine structure of showers can be measured and used to enhance pileup rejection and particle identification, whilst still achieving good energy resolution. The ECAL and a large fraction of HCAL will be based on hexagonal silicon sensors of 0.5 - 1 cm^2 cell size, with the remainder of the HCAL based on highly-segmented scintillators with SiPM readout. The intrinsic high-precision timing capabilities of the silicon sensors will add an extra dimension to event reconstruction, especially in terms of pileup rejection. An overview of the HGCAL project is presented, covering motivation, engineering design, readout and trigger concepts, and expected performance.
        Speaker: Florian Pitters (C)
        Slides
      • 10:12 AM
        Electromagnetic calorimeter prototype for the SoLID project at Jefferson Lab 18m
        SoLID (Solenoidal Large Intensity Device) is a new, general-purpose, large acceptance spectrometer being planned for experimental Hall A at Jefferson Lab, Newport News, Virginia, USA. The shashlik-type sampling technique will be used for the electromagnetic calorimeter for SoLID. This calorimeter is 20 radiation-lengths long with 194 layers each of 1.5mm-thickness plastic scintillators alternating with 0.5mm-thickness lead plates. A few calorimeter prototype modules have been built at Shandong University. The light yield of these modules has been test with cosmic ray. Preliminary beam tests were carried out as well. The building process of these calorimeter prototype modules, cosmic ray and beam test results will be presented.
        Speaker: Prof. Cunfeng Feng (Shandong university)
        Slides
    • 9:00 AM 10:30 AM
      R2-Neutrino Detectors(2) Room 305C

      Room 305C

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Prof. Gerald Eigen (University of Bergen) , daniele vivolo (INFN-NA)
      • 9:00 AM
        Slow liquid scintillator for scintillation and Cherenkov light separation 18m
        Slow liquid scintillator (water-based or oil-based) is proposed as the detection material of a few future neutrino experiments. It can be used to distinguish between scintillation and Cherenkov light. Thus neutrino detectors with it will have the directionality and particle identification for charged particles, so that a better sensitivity is expected for low energy (MeV-scale) neutrino physics, solar physics, geo-science and supernova relic neutrino search. Linear alkylbenzene (LAB) is the primary component or ingredient of these liquid scintillators. We studied all the relevant physical aspects of different combinations of LAB, 2,5-diphenyloxazole (PPO) and p-bis-(o-methylstyryl)-benzene (bis-MSB), including the light yield, time profile, emission spectrum, attenuation length of scintillation emission and visiable light yield of Cherenkov emission. We also measured the attenuation spectrum of some relevant neutrino detector material, like acrylic. Some formulations allow a good separation between Cherenkov and scintillation light, and a reasonable high light yield can also be achieved. The expected improvement on physics with such type of liquid scintillator will also be discussed.
        Speaker: Mr Ziyi Guo (Tsinghua University)
        Slides
      • 9:18 AM
        The R&D progress of the Jinping Neutrino Experiment 18m
        The Jinping Neutrino Experiment will perform an in-depth research on solar neutrinos, geo-neutrinos and supernova relic neutrinos. Many efforts were devoted to the R&D of the experimental proposal. The assay and selection of low radioactive stainless-steel (SST) was carried out. The U and Th concentration is less than 1e-8 g/g for selected SST samples. A wide field-of-view and high-efficiency light concentrator is developed. Previous designs of light concentrators were optimized to attain a wide field view, 90 degree and a high efficiency, above 98%. At the same time a 1-ton prototype is constructed and placed underground at Jinping laboratory to 1) test the performance of several key detector components, like acrylic, pure water, using of ultra-high molecular weight polyethylene rope, 2) understand the neutrino detection technology with liquid scintillator and slow liquid scintillator and 3) measure the in-situ Jinping underground background, like fast neutron. The design, construction and initial operation of the 1-ton prototype will be discussed. A simulation framework is also developed to facilitate the experimental study of the 1-ton prototype and future detector design.
        Speaker: Dr Lei Guo (Tsinghua University)
        Slides
      • 9:36 AM
        Light Detection with Large Area DUV Sensitive SiPMs in nEXO 18m
        The Enriched Xenon Observatory (EXO) is aiming to search for 0νββ decays of Xe-136 by using liquid xenon TPC detector. nEXO is the second phase of EXO with 5 tons of liquid xenon TPC, requiring ~4m2 of photo-detectors which have to be very efficient at 175nm and very radio-pure. SiPMs are ideally suitable for this application, however they have never been used in large area and detection efficiency at DUV region is relatively low. In the past a few years, lots of efforts have been made to develop photo-detector system for nEXO. In this talk, we will report on the requirements of photo-detector in nEXO, characterization of SiPMs manufactured by Fondazione Bruno Kessler (FBK), Hamamatsu Photonics and KETEK, analog readout technology for large area SiPMs, inter-connections, etc.
        Speaker: Dr Guofu Cao (IHEP)
        Slides
      • 9:54 AM
        Double Calorimetry System in JUNO Experiment 18m
        The Jiangmen Underground Neutrino Observatory (JUNO) is a multipurpose neutrino-oscillation experiment, with a 20 kiloton liquid scintillator detector of unprecedented 3% energy resolution (at 1 MeV) at 700-meter deep underground. There are ~18,000 20-inch photomultiplier tubes (PMTs) in the central detector with an optical coverage greater than 75%. Control of the systematics of the energy response is crucial to archive the designed energy resolution as well as to reach 1% precision of the absolute energy scale. The detected number of photoelectrons in each PMT differs by two orders of magnitude in the reactor antineutrino energy range in such a large detector, which is a challenge to the single channel charge measurement. JUNO has approved a new Small-PMT system, including up to 36,000 3-inch PMTs, installed alternately with 20-inch PMTs. The individual 3-inch PMT receives mostly single photoelectrons, which provides a unique way to calibrate the energy response of the 20-inch PMT system by a photon-counting technology. Besides, the Small-PMT system naturally extends the dynamic range of the energy measurement to help the high-energy physics, such as cosmic muons and atmospheric neutrinos. We will present the physics concept of this double calorimetry, the design and implementation of the 3-inch PMT and its readout electronics system.
        Speaker: Dr Miao He (高能所)
        Slides
      • 10:12 AM
        Discussion time 18m
    • 9:00 AM 10:30 AM
      R3-Medical Imaging, security and other applications Room 305E

      Room 305E

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Igal Jaegle (University of Florida) , Dr qiang wang (ihep)
      • 9:00 AM
        Multi-layer ionization chamber for quality assurance and stopping power measurements 18m
        The Center for Proton Therapy (CPT) of the Paul Scherrer Institute has a long history of technical innovation and development in the field of proton therapy and related quality assurance (QA). The second proton pencil beam scanning gantry built at the CPT, Gantry2, is a state-of-the-art system. The unique integration of QA equipment and detectors within the control system of the gantry allows for fast and detailed measurements. Here we present our latest developments in detection systems, their performance for QA and research capabilities in comparison with their commercial equivalent. The QA equipment developed for proton range measurement at Gantry2 consists of a multi-layer ionization chamber (MLIC). We compare three unique MLIC systems, including a commercially available device, against a water-based range measurement device as reference. The range measurement with the MLIC shows a deviation of less than 0.5 mm water equivalent thickness for 115 energies between 70 MeV and 230 MeV on a daily basis, since November 2013. The extensive integration of our detectors with the control system allows fast spot-based measurement. Including the energy change, we can achieve a proton range evaluation within 125ms. Consequently, our device can measure the proton range alteration caused by material samples for hundreds of energies within less than a minute. This method provides a fast and direct way to measure the stopping power of compounds with a σ < 0.1mm. The results show the strong points of the equipment developed in-house, such as the consistency, the reliability and the innovation possibilities.
        Speaker: Francis Gagnon-Moisan (Paul Scherrer Institute)
        Slides
      • 9:18 AM
        XEMIS: liquid xenon Compton camera for 3γ imaging 18m
        We report on an innovative liquid xenon Compton camera project, XEMIS (XEnon Medical Imaging System), for a new functional medical imaging technique based on the detection in coincidence of 3 $\gamma$-rays. The purpose of this 3$\gamma$ imaging modality is to obtain a 3D image using 100 times less activity than in current PET systems. The combination of a liquid xenon time projection chamber (LXe-TPC) and a specific ($\beta^{+}$,$\gamma$) radionuclide emitter $^{44}$ Sc is investigated in this concept. In order to provide an experimental demonstration for the use of a LXe Compton camera for 3$\gamma$ imaging, a succession of R&D programs, XEMIS1 and XEMIS2, have been developed using innovative technologies. Nevertheless, the ultimate goal consists in a large camera XEMIS3 for whole human body imaging building. The first prototype XEMIS1 has been successfully validated showing very promising results for energy, spatial and angular resolutions with an ultra-low noise front-end electronics (below 100 electrons fluctuation) operating at liquid xenon temperature of 101 $^{\circ}$C at 1.2 bar. A timing resolution of 44.3$\pm$3.0 ns for 511 keV photoelectric events has been estimated from the drift time distribution, equivalent to a spatial resolution along z-axis of roughly 100 $\mu$m. The second phase dedicated to a 3D images of small animals, XEMIS2, is now under qualification. XEMIS2 is a monolithic liquid xenon cylindrical TPC that holds around 200 kg of liquid xenon, totally surrounding the small animal. The active volume of detector is covered by 64 Hamamatsu PMTs and two end segmented anodes with a total amount of 20000 pixels, to detect simultaneously the UV scintillation photons and ionization signals produced after interaction of ionizing radiation. Characterizations of ionization signal using Monte Carlo simulation and data analysis have shown good performances for energy measurement. Besides, in order to maintain the normal operation liquid xenon at the desired temperature and pressure, or to recover as fast as possible in urgent case, an innovative compact liquid xenon cryogenics subsystem (called ReStoX) has been successfully developed and validated. The XEMIS2 camera will be operational this year for preclinical research at the Center for Applied Multi-modality Imaging (CIMA) in the Nantes Hospital, while the detector performance has been evaluated through a dedicated simulation analysis.
        Speaker: Yajing XING (SUBATECH, CNRS/IN2P3, Université de Nantes, Ecole des Mines de Nantes)
        Slides
      • 9:36 AM
        Feasibility study of track-based multiple scattering tomography 18m
        Tomographic methods for the imaging and visualization of complex structures are widely used not only in medical applications but also for scientific use in numerous fields. The CT-Imaging technique, which is commonly used for imaging in industry and the medical sector, exploits the difference of attenuation length for photons in different materials. Complete absorption of the photon beam for materials of higher atomic numbers poses a limit on the technique. We propose a new imaging method based on the tracking of electrons in the GeV range traversing a sample under investigation. By measuring the distribution of the deflection angle at the sample, an estimate on the material budget is extracted for a given 2D-cell in the sample. This allows for the 3D-reconstruction of the material budget making use of an inverse Radon transform. For the validation of this method, the AllPix Detector Simulation Framework including the Geant4 Framework was used to simulate a realistic setup. This simulation includes the DATURA Beam Telescope for high-precision particle tracking and an electron beam in the range of several GeV as can be found at the DESY Test Beam Facility, for which first tests are planned. A structured aluminum phantom was used as sample under study. The proposed imaging method represents a candidate for an alternative high-resolution tomographic technique. We will present a feasibility study on the track-based multiple scattering tomography including the simulation setup and reconstruction algorithms. It is shown that this method is able to resolve structures in the range of a few hundreds of micrometers for aluminum targets. The limits of this tomographic technique are discussed in terms of spatial resolution, cell-to-cell variance and discrimination power on material budget.
        Speaker: Paul Schuetze (Deutsches Elektronen-Synchrotron DESY)
        Slides
      • 9:54 AM
        A fast monolithic pixel detector in a SiGe Bi-CMOS process 18m
        The TT-PET collaboration is developing a new generation of fast, low noise and low power-consumption monolithic silicon detector in SiGe Bi-CMOS technology. The target of this R&D is to produce a 100µm thick monolithic detector, with a time resolution better than 100ps for minimum ionizing particles, 1mm^2 readout pads and a time digitization at 20ps level. This performance will be achieved with an overall power consumption of less than 20 mW/cm^2. A first application of this detector will be the development of a silicon-based TOF-PET scanner with 30ps time resolution for 511 keV photons. The results of testbeam measurements using discrete component electronics, as well as the preliminary lab measurements on a monolithic chip realised with the SG13S IHP process will be presented.
        Speaker: Lorenzo Paolozzi (University of Geneva)
        Slides
      • 10:12 AM
        PETIROC2A : New measurement results on fast ToF SiPM read-out chip 18m
        Petiroc2A is a 32-channel ASIC designed conjointly by Omega laboratory and Weeroc company. It is aimed for SiPM read-out for time-of-flight application prototyping. It is a complete read-out ASIC embedding a fast trigger line with a 10GHz gain-bandwidth product and a precise energy measurement based on a shaper. Following the very front-end chain, a time-to-amplitude converter allows to interpolate the time of arrival of an event between two master clock tick. A Wilkinson ADC ensures the analogue to digital conversion of both energy and timing. Digital data are outed through a serial link. Petiroc2A can also be used in different operation mode. Digital back-end can be disabled to allow full-analogue mode. In that case, analogue data and channel triggers are outed directly and can be exploited at the user needs. A photon counting operating mode can also be set up. In photon counting mode, the 32 triggers are available and photon counting up to 120MHz has been measured. ![enter image description here][1] Latest measurement on Petiroc2A will be presented in all of the three operating mode of the ASIC. In full digital mode, linearity and intrinsic timing resolution will be exposed. In analogue mode, maximum event rate will be shown with associated timing and energy resolution. In photon counting mode, maximum frequency will be shown. Beyond electrical measurements, nuclear measurement will be exposed such as CRT and energy resolution from measurement done at CERN and at several of Petiroc2A user facilities. [1]: http://www.weeroc.com/images/Products/blockscheme/petiroc2.png
        Speaker: Julien Fleury (W)
        Slides
    • 9:00 AM 10:30 AM
      R4-Photon detectors(2) Room 307

      Room 307

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Hugo Delannoy (Interuniversity Institute for High Energies (ULB-VUB)) , Valerio Vagelli (INFN-PG)
      • 9:00 AM
        Characterisation of the Hamamatsu silicon photomultiplier arrays for the LHCb Scintillating Fibre Tracker Upgrade 18m
        In the context of the LHCb detector upgrade, during the long shutdown of LHC (2019/2020), the complete tracking system will be replaced to cope with the increased luminosity and trigger less readout scheme. A large area (300m^2) scintillating fibre tracker (SciFi) with more than 500K channels and 250um readout pitch is under construction. The silicon photomultiplier used for the read-out provide high photon detection efficiency, low correlated noise (optical cross-talk and after-pulse), short recovery time and withstand a high neutron fluence. The Hamamatsu photo-detectors selected in November 2016 have been characterised before and after irradiation with neutrons and protons. We will focus in this talk on the study of the performance of these devices in the context of the LHCb SciFi application regarding the single photon detection capability after irradiation.
        Speaker: Axel Kuonen (Ã)
        Paper
        Slides
      • 9:18 AM
        The Status of the R&D of the 20 inch MCP-PMT in China 18m
        The JUNO (Jiangmen Underground Neutrino Observatory) to be built in JiangMen, Guangdong province in south China is a generic underground national lab for neutrino physics and other research fields. Its neutrino program requires a high perfor-mance large detector, which needs approximately 16,000 Photomultiplier Tubes (PMTs), that have large sensitive area, high quantum efficiency, high gain and large peak-to-valley ratio (P/V) for good single photoelectron detection. Researchers at IHEP, Beijing have conceived a new concept of MCP-PMT several years ago. The small MCP (Microchannel Plate) units replace the bulky Dynode chain in the tranditional large PMTs. In addition transmission photocathode on the front hemisphere and reflection photocathode on the rare hemisphere are fabricated in the same glass bulb to form nearly 4π effective photocathode in order to enhance the efficiency of photoelectron conversion. A number of experienced researchers and engi-neers in research institutes and companies related to PMT fabrication in China jointly worked on the large area MCP-PMT project. After three years R&D, a number of 8 inch prototypes were produced and their performance was carefully tested at IHEP in 2013 by using the MCP-PMT evaluation system built at IHEP. The 20 inch prototypes were fol-lowed in 2014, and its’ per-formance were improving a lot in 2015. The characteristics of the transmission photo-cathode (Trans. PC) was carefully studied by meas-uring the I-V curves, the quantum efficiency (QE) vs. wavelength, and by mapping the QE for both the 8 and 20 inch photocathodes. Charge spectra of sin-gle photoelectrons, timing properties of anode sig-nals and anode linearity were measured. Noise characteristics and after pulse properties were stud-ied at gain ~1.0×107. We are continuing simulation and experimental work to further improve our 8 and 20 inch MCP-PMT prototypes, in particular to improve the QE of the transmission photocathode and the photoelec-tron collection efficiency (CE) of the MCP unit. We believe for 20 inch prototypes, QE greater than 30% and CE better than 90% CE is possible. With the large area about the photocathode, the QE and DE will be improved, but the TTS and dark noise will be worse. So, the users need to get the balance between these above parameters for differ-ent physics aims. Especially, the glass used for 20 inch MCP-PMT has extra low potassium, low uranium and the con-tents resulting extra low radiation background. The PMT purchase of JUNO The JUNO Bidding started on Oct.23th 2015, and completed on Nov.17th 2015. Compensating the PMT performance with fiducially volume con-vert all specifications to cost, radioactivity, dark noise, TTS, the JUNO ordered 15000 pic 20 inch MCP-PMT from the NNVT.
        Speaker: Dr Sen Qian (高能所)
        Paper
        Slides
      • 9:36 AM
        The 20-inch PMT system for the JUNO experiment 18m
        The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose neutrino experiment currently under the stage of civil construction. The primary goal is to determine the neutrino mass hierarchy and precisely measure the oscillation parameters by detecting reactor anti-neutrinos. There will be around 20000 PMTs with a large photo-cathode of 20-inch equipped for the JUNO experiment, which include 15000 MCP PMTs from a Chinese vendor and 5000 Dynode PMTs from Hamamatsu. To achieve the designed 3% energy resolution, the PMTs are required to have very high detection efficiency as well as very compact layout in the central detector. The PMT system for JUNO includes PMT characterization, waterproof sealing, chain implosion protection, earth-magnetic field shielding, and finally their installation to the detector. Characterization of the PMTs will use a test stand developed in a container for mass testing and a scanning station for sampling test. Since the PMTs are required to work for 20 years in high purity water with a depth up to 45 m, and the front-end electronics including base, high voltage and the ADC chips will be put on PMT, it is very important to design a highly reliable waterproofed sealing. And in a situation that the PMTs will be closest possible arranged with the spacing only a few mm to achieve a coverage larger than 75% in the central detector, their protection from chain implosion and also their installation is very challenging. In this talk, all the aspects of building the large PMT system for the JUNO experiment will be addressed, with a focus on the most challenging parts mentioned above.
        Speaker: Dr Zhonghua Qin (高能所)
        Slides
      • 9:54 AM
        Characterization of the large area photocathode PMTs for the JUNO Detector 18m
        The primary physics goal of the Jiangmen Underground Neutrino Observatory (JUNO) is to resolve neutrino mass hierarchy taking the advantage of the copious antineutrinos from two powerful nuclear power plants at distances of ~53 km in Guangdong Province, China. To meet this goal, JUNO has designed a 20 kt underground liquid scintillator (LS) detector that deploys 20 k high quantum efficiency (HQE) photomultipliers (PMTs) to reach an energy resolution of 3%/$\sqrt{(E/MeV)}$ and an energy scale uncertainty better than 1%. The required performance on such a massive LS detector is unprecedented, which places stringent requirements on the two types of PMTs used by JUNO, the Hamamatsu HQE PMT and the newly developed micro-channel plate (MCP) PMT. To select qualified PMTs and, more importantly, to supply the detector simulation with precise PMT performance data, the JUNO collaboration has developed two PMT performance evaluation systems, an industrial container based multi-PMT testing system and PMT photocathode uniformity scanning station. This talk will explain the requirements on the two types of JUNO PMTs in connection to its physical goals, the technical designs of the two PMT evaluation systems and the strategy to carry out the PMT evaluation.
        Speaker: Prof. Wei Wang (Sun Yat-Sen University)
    • 10:30 AM 11:00 AM
      Tea Break 30m Corridor on the third floor

      Corridor on the third floor

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
    • 11:00 AM 12:30 PM
      R1-Astrophysics and space instrumentation(1) Room 305A

      Room 305A

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Gary Varner (University of Hawaii) , Miroslav Gabriel (Max Planck Institute for Physics)
      • 11:00 AM
        SiPM-based Camera for Image Air Cherenkov Telescope of LHAASO 18m
        The SiPM-based camera technology is designed and developed for the Wide Field of View Cherenkov Telescope Array (WFCTA) of the Large High Altitude Air Shower Observatory (LHAASO) in the paper. WFCTA consists of 18 Cherenkov telescopes. Each Cherenkov telescope consists of an array of 32×32 SiPM array which cover a field of view 14°×16°with a pixel size of 0.5 °. The main scientific goal of WFCTA is to measure the ultra high energy cosmic ray composition and energy spectrum from 30 TeV to a couple of EeV. Because SiPM cannot be aging under strong light exposure, SiPM-based camera can be operated in half moon conditions, thus achieve a longer duty cycle than PMT-based camera, e.g. the duty cycle of SiPM-based camera is about 30%, while the PMT-based camera is about 10%. In addition to no aging due to strong light exposure, SiPM has more advantages like single photon counting response, high detection efficiency, high gain at low bias voltage and no sensitive to magnetic fields.
        Speaker: Dr Shoushan Zhang (Institute of High Energy Physics)
        Slides
      • 11:18 AM
        A comprehensive analysis of polarised $\gamma$-ray beam data with a HARPO demonstrator 18m
        The HARPO is a design concept of the gaseous TPC aiming for a high precision telescope and polarimeter for cosmic $\gamma$-rays especially in the energy range from the pair-production threshold up to the order of 1 GeV, where current $\gamma$-ray telescope has a sensitivity drop and no polarimetry exists due to the multiple scattering. In order to investigate the feasibility, we built a HARPO demonstrator and performed a beam test campaign with a polarised $\gamma$-ray at the NewSUBARU accelerator in Japan in 2014. Our earlier studies showed promising results as a polarimeter even before performing analysis optimization. We are finalizing the polarimetry study by optimizing analysis and also extending our study to the angular resolution as its telescope performance.
        Speaker: Ryo Yonamine (CEA/Saclay)
        Slides
      • 11:36 AM
        TAIGA experiment – a new instrument for high energy gamma-ray astronomy and cosmic ray studies. 18m
        The gamma-ray observatory TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) is being developed to study gamma rays and fluxes of charged cosmic rays in the energy range of 10^13 eV – 10^18 eV. The array will include a network of wide-angle (Field-of-view (FOV) - 0.6 sr) Cherenkov stations and up to 16 Imaging Atmospheric Cherenkov Telescopes (IACTs) with FOV~10×10 degrees each covering an area of 5 km² and muon detectors with a total area of 2000 m^2 distributed over an area of 1 km2. The expected sensitivity of the observatory to search for local sources of gamma-rays in the energy range of 30-200 TeV is about 10-13 erg/cm^2 sec. In the paper we give a detailed description of photon detectors developed for the experiment. This paper presents also results of operation of the first 28 wide-angle Cherenkov stations.
        Speaker: Dr Bayarto Lubsandorzhiev (Institute for Nuclear Research of the Russian Academy of Sciences)
      • 11:54 AM
        Design and performances of the ED and the prototype array for LHAASO-KM2A 18m
        This paper describes the design optimization and performances of Electromagnetic particle Detector (ED) used in one km square extensive air shower array (KM2A) in LHAASO project. A 42-ED prototype array was set up at the Yangbajing cosmic ray observatory and has been in stable operation for two years. The performances of the prototype array are studied through hybrid observation of cosmic ray showers with the ARGO-YBJ experiment. The long term stability of the ED and the array are also presented.
        Speaker: Mr jia liu (IHEP)
        Slides
      • 12:12 PM
        Calibration of the LHAASO-KM2A electromagnetic particle detectors 18m
        The Large High Altitude Air Shower Observatory (LHAASO) is a multipurpose project focusing on the study of high energy gamma ray astronomy and cosmic ray physics. The one square kilometer array (KM2A) of the observatory will consists of more than 5000 electromagnetic particle detectors (EDs). The large number of detectors demands on a robust, automatic self-calibration method. In this paper, the hardware and software-level methods used to calibrate the output charge and relative time-offset of EDs are described. These two independent calibration techniques have been applied in the KM2A prototype array to provide an estimation of uncertainties. As a result of this work, we have achieved a precision which can meet the requirements of KM2A EDs.
        Speaker: Mr Hongkui Lv (Institute of High Energy Physics)
        Slides
    • 11:00 AM 12:30 PM
      R2-Experimental detector systems(2) Room 305C

      Room 305C

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Murat Guler (METU) , Prof. Yinong LIU (Tsinghua University)
      • 11:00 AM
        The gas systems for the detectors at the LHC experiments: overview of the performances and upgrade strategy in view of the High Luminosity LHC phase. 18m
        Over the five experiments (ALICE, ATLAS, CMS, LHCb and TOTEM) taking data at the CERN Large Hadron Collider (LHC) 27 gas systems are delivering the proper gas mixture to the corresponding detectors. Each gas system is made of different functional modules which are distributed on average into about 10 Universal Euroracks. If we imagine to put one on the top of the other the 270 Euroracks used for the LHC gas systems, we reach a height (about 500 meters) higher than the tour Eiffel height. The gas systems for the LHC experiments were built according to a common standard allowing minimizing manpower and costs for maintenance and operation. A typical gas system is made of several modules: mixer, pre-distribution, distribution, circulation pump, purifier, gas analysis, etc. Gas systems extend from the surface building where the primary gas supply point is located to the service balcony on the experiment following a route few hundred meters long. Even if all functional modules are basically equal between different gas systems, they can be configured to satisfy the specific needs of every gaseous particle detector. The statistic accumulated over the last years of LHC operation demonstrates how stable and reliable the gas systems for the LHC experiments are: on average a system was in stop for less than 1 hour per year, corresponding to an efficiency greater than 99.98%. Despite the excellent result, the activities are addressed to a careful planning of maintenance and consolidation/upgrade work to maintain and, possibly, improve the performances in the years to come. Clear examples concern the gas system’s flow regulators, the needs for an increase in the gas flow circulation in the detectors and the effort for reducing the consumption of expensive or greenhouse gases. After several years of operation, the performance of specific flow regulators is currently under investigation. An extensive calibration/verification campaign is ongoing. It will allow optimizing the flow range for future operation and to understand the performance in relation with the specific gas used. The circulation flow increase is needed to safely operate the detectors at the higher LHC luminosity foreseen in the years to come and/or to integrate new detectors installed during present or imminent upgrades. In addition, also the gas system needs reinforcements in order to maintain a certain redundancy ensuring a fast recovery in case of unexpected failures. Given the large detector volume served by the gas systems and the use of relatively expensive or greenhouse gases components, for technical and economical reasons most of the detectors are operated in gas re-circulation mode. In addition, new systems, making use of different principles, have been developed for the recuperation of the gas mixture present inside the detectors. This operation is of particular relevance especially in preparation of the future LHC shutdowns. Some examples will be described in the present contribution.
        Speaker: Roberto Guida (C)
        Slides
      • 11:18 AM
        Design of a high count rate photomultiplier base board for the sodium iodide detector on PGNAA 18m
        Prompt gamma neutron activation analysis (PGNAA) is a measurement technique for nondestructive elemental analysis. The method is used intensively for on-line and in situ analysis in various fields. It has a short measurement time, usually only about 120s. In order to ensure the measurement accuracy and get better statistics, the measurement system requires a high count rate, which is an important indicator of PGNAA. Industrial field applications must have large detector sizes to increase the detection efficiency. A sodium iodide (NaI) detector which size is 6×7 inch is used. Resistor divider structure is used in conventional PMT base board. At high count rate condition, the drive current would be insufficient and the output signal would be distorted, which leaded to the destruction of the linear relationship between the PMT output signal amplitude and the incident particle energy. The upper limit of energy spectrum is only 5MeV at 100k count rate. In this paper, a PMT base board with current amplification design has been developed. The PNP transistor is used to amplify the drive current. It can avoid the AC coupling and can achieve small size. The test results show that the design satisfies the drive current demand at high count rate. The design increases the upper limit of energy spectrum to 10MeV at 250k count rate, which improves the resolution of elements.
        Speaker: Mr Baochen Wang (University of Science and Technology of China)
        Slides
      • 11:36 AM
        A stand alone muon tracking detector based on the use of Silicon Photomultipliers 18m
        We present the characterization and performances of a muon tracking detector developed by New York University Abu Dhabi and Gran Sasso National Laboratory (Italy). The tracker consists of 200 channels, organized in 10 separate levels. Each level is composed of two independent 40 cm X 40 cm planes, each one equipped with 10 plastic scintillator bars read out through Silicon Photomultipliers. To increase the light collection, wavelength shifter fibers have been embedded in the scintillator bars. The instrument can be controlled and remotely operated acting on trigger level, detection thresholds and on the acquisition making possible routinely checking (noise spots, efficiency maps, event cluster length) especially if deployed in locations with limited access. The detector and its data acquisition system have been designed and built with the aim at providing 3D particle reconstruction within 2 cm precision allowing for the determination of the direction. We will discuss its main applications: the possibility of precise measurements of the muon angular distribution, its possible use in Cultural Heritage studies allowing for the discovery of hidden chambers in pyramids for example and its capabilities of making building tomography.
        Speaker: Adriano Di Giovanni (N)
        Slides
      • 11:54 AM
        The Barrel DIRC Detector for the PANDA Experiment at FAIR 18m
        The PANDA experiment at the international accelerator Facility for Antiproton and Ion Research in Europe (FAIR) near GSI, Darmstadt, Germany will address fundamental questions of hadron physics. Excellent Particle Identification (PID) over a large range of solid angles and particle momenta will be essential to meet the objectives of the rich physics program. Charged PID for the barrel region of the PANDA target spectrometer will be provided by a DIRC (Detection of Internally Reflected Cherenkov light) detector. The PANDA Barrel DIRC will cover the polar angle range of 22-140 degrees and separate charged pions from kaons for momenta between 0.5 GeV/c and 3.5 GeV/c with a separation power of at least 3 standard deviations. The design is based on the successful BABAR DIRC and the SuperB FDIRC R&D with several important improvements to optimize the performance for PANDA, such as a focusing lens system, fast timing, a compact fused silica prism as expansion region, and lifetime-enhanced Microchannel-Plate PMTs for photon detection. We will discuss the baseline design of the PANDA Barrel DIRC, based on narrow bars made of synthetic fused silica and a complex multi-layer spherical lens system, and the potentially cost-saving design option using wide fused silica plates, and present the result of tests of a large system prototype with a mixed hadron beam at CERN.
        Speaker: Roman Dzhygadlo (GSI Helmholtzzentrum für Schwerionenforschung GmbH)
        Slides
      • 12:12 PM
        Discussion time 18m
    • 11:00 AM 12:30 PM
      R3-Trigger and data acquisition systems(2) Room 305E

      Room 305E

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Louis Helary (CERN) , Ralf SPIWOKS (CERN)
      • 11:00 AM
        The Phase-1 Upgrade of the ATLAS Level-1 Endcap Muon Trigger 18m
        The LHC is expected to increase its instantaneous luminosity to $3\times10^{34} \rm{cm^{-2}s^{-1}}$ after the 'Phase-1' upgrade, to take place from 2018-2020. In order to cope with the high luminosity, an upgrade of the ATLAS trigger system will be required. The first-level Endcap Muon system identifies muons with high transverse momentum by combining data from fast a muon trigger detector, TGC, and some inner station detectors. In the Phase-1 upgrade a new detector, called the New-Small-Wheel (NSW), will be installed at the inner station region. Finer track information from the NSW can be used as part of the muon trigger logic to enhance performance significantly. In order to handle data from both TGC and NSW some new electronics have been developed, including the trigger processor board known as 'Sector Logic'. The Sector Logic board has a modern FPGA to make use of Multi-Gigabit transceiver technology, which will be used to receive data from the NSW. The readout system for trigger data has also been re-designed, with data transmission planned to be implemented with TCP/IP instead of a dedicated ASIC. This makes it possible to minimise the use of custom readout electronics and instead use some commercial PCs and network switches to collect, format and send the data. This presentation will describe the aforementioned upgrades of the first-level Endcap Muon trigger system. Particular emphasis will be placed on the electronics and its firmware. The performance of the system and the trigger performance will be also discussed.
        Speaker: Akatsuka Shunichi (Kyoto University)
        Slides
      • 11:18 AM
        The Phase-1 Upgrade of the ATLAS First Level Calorimeter Trigger 18m
        The ATLAS Level-1 calorimeter trigger is planning a series of upgrades in order to face the challenges posed by the upcoming increase of the LHC luminosity. The hardware built for the Phase-1 upgrade will be installed during the long shutdown of the LHC starting in 2019, with the aim of being fully commissioned before the restart in 2021. The upgrade will benefit from new front end electronics for parts of the calorimeter which provide the trigger system with digital data with a tenfold increase in granularity. This makes possible the use of more complex algorithms than currently used and while maintaining low trigger thresholds under much harsher collision conditions. Of principal significance among these harsher conditions will be the increased number interactions per bunch crossing, known as pile-up. The Level-1 calorimeter system upgrade consists of an active and a passive system for digital data distribution and three different Feature EXtraction systems (FEXs) which run complex algorithms to identify electromagnetic energy deposits, taus, hadronic jets, large area jets as well as total and missing transverse momentum. These algorithms feature isolation criteria and pile-up subtraction techniques as well as multiplicity determination for large area jets. The algorithms are implemented in firmware on custom electronics boards with up to four high speed processing FPGAs. The identified trigger objects are transmitted to the topological trigger system, which counts the objects with energies above configurable thresholds and performs various topological trigger algorithms combining the properties of different objects. The main characteristics of the electronic boards are a high input bandwidth up to several TB/s per module implemented through optical receivers and a large number of tracks (up to several hundred) providing high speed (up to 12.8 Gb/s ) connections on the modules between the receivers and the FPGAs as well as between the FPGAs for data sharing. The PCB design uses modern materials and signal routing is supported by modern design tools to ensure a high level of data integrity. The used electrical power is estimated to be up to 400 W per module, which necessitates careful design of the power distribution and heat dissipation system. Extensive simulation studies are carried out to understand and optimise the characteristics of the modules. Prototypes have been built and extensively tested to prepare for the final design steps and the production of the modules. The contribution will give an overview of the system and discuss the module design challenges. Extensive tests of the boards, including tests of the data transmission between modules, will be reported.
        Speaker: Victor ANDREI (Kirchhoff Institute for Physics, Heidelberg University)
        Slides
      • 11:36 AM
        The CMS Level-1 Calorimeter Trigger Upgrade for LHC Run II 18m
        An upgrade of the CMS Level-1 calorimeter trigger has been completed, fully commissioned and was used by CMS to collect data starting with the 2016 run. The new trigger has been designed to improve performance at high luminosity and large number of simultaneous inelastic collisions per crossing (pile-up). For this purpose it uses a novel design, the Time Multiplexed (TM) design, which enables all the data from an event to be processed by a single trigger processor at full granularity over several bunch crossings. The TM design is a modular design based on the uTCA standard. The trigger processors are instrumented with Xilinx Virtex-7 690 FPGAs and 10 Gbps optical links. The TM architecture is flexible and the number of trigger processors can be expanded according to the physics needs of CMS. Intelligent, sophisticated and innovative algorithms are now the core of the first decision layer of CMS: the upgraded trigger system implements pattern recognition and MVA (Boosted Decision Tree) regression techniques in the trigger processors for momentum assignment, pile up subtraction, and isolation requirements for electrons, and tau leptons. The resolution of the jet pseudorapidity and azimuthal angle have dramatically improved, allowing the implementation of di-jet mass triggers. The performance of the TM design and latency measurements are presented, alongside algorithm performance measured using the 2016 data and a summary of the running experience from 2016.
        Speaker: Alessandro Thea (R)
        Slides
      • 11:54 AM
        The ATLAS Muon-to-Central Trigger Processor Interface (MUCTPI) Upgrade 18m
        The Muon-to-Central Trigger Processor Interface (MUCTPI) is part of the Level-1 trigger system of the ATLAS experiment at the Large Hadron Collider (LHC) at CERN. We will describe an upgrade of the MUCTPI which will use optical input and provide full precision region-of-interest information on muon candidates to the topological trigger processor of the Level-1 trigger system. The new MUCTPI will be implemented as an ATCA blade receiving 208 optical serial links from the ATLAS muon trigger detectors. Two high-end processing FPGAs will eliminate double counting of identical muon candidates in overlapping regions and send candidate information to the topological trigger. A third FPGA will combine the candidate information, send muon multiplicities to the Central Trigger Processor (CTP) and provide readout data to the ATLAS data acquisition system. A System-on-Chip (SoC) module will provide communication with the ATLAS run control system for control, configuration and monitoring of the new MUCTPI.
        Speaker: Spiwoks Ralf (Rutherford Appleton Laboratory)
        Paper
        Slides
      • 12:12 PM
        Discussion time 18m
    • 11:00 AM 12:30 PM
      R4-Semiconductor detectors(2) Room 307

      Room 307

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: K.K. Gan (The Ohio State University) , Prof. Kazuhiko Hara (University of Tsukuba)
      • 11:00 AM
        Belle-II Silicon Vertex Detector 18m
        The Belle II experiment at the SuperKEKB collider in Japan will operate at an unprecedented luminosity of $8\times10^{35}$ cm$^{-2}$ s$^{-1}$, about 40 times larger than its predecessor, Belle. Its vertex detector is composed on two-layer DEPFET pixel detector (PXD) and four layers double-sided silicon microstrip detector (SVD). To achieve a precise decay-vertex position determination and excellent low-momentum tracking under a harsh background condition and high trigger rate of 10 kHz, the SVD employs several innovative techniques. In order to minimise the parasitic capacitance in the signal path, 1748 APV25 ASIC chips, which read out signal from 224k strip channels, are directly mounted on the modules with the novel Origami concept. The analog signal from APV25 are digitised by a flash ADC system, and sent to the central DAQ as well as to online tracking system based on SVD hits to provide region of interests to the PXD for reducing the latter's data size to achieve the required bandwidth and data storage space. Furthermore, the state-of-the-art dual phase CO$_2$ cooling solution has been chosen for a combined thermal management of the PXD and SVD system. In this talk, we present the key design principles, module construction and integration status of the Belle II SVD.
        Speaker: Bahinipati Seema (TIFR Mumbai)
        Slides
      • 11:18 AM
        Silicon Tracker for the J-PARC muon g-2/EDM experiment 18m
        The J-PARC muon g-2/EDM experiment is a planned experiment to measure the anomalous magnetic moment (g-2) and the electric dipole moment (EDM) of muons. In contrast to the experiment at Fermilab, which uses "magic momentum" (~3.09 GeV/c) of muons to exclude the electric field dependent term on the spin precession frequency, our experiment uses ultra-cold slow muon beam which requires no focusing electric field to be free from the term. Since the beam is slow (~300 MeV/c), we can store the muons to a relatively small magnetic bottle, equipped with a positron tracker to observe the muon decay very precisely. Since the two experiments have different sources of systematic effects, we can complimentarily probe the g-2 deviation from the Standard Model, which may lead to confirm the effect of new physics. The positron tracker consists of 48 vanes (96 sides) of detector layers. Each vane consists of 2 times 8 silicon strip sensors, incorporated with flexible printed circuit (FPC) and embedded front-end electronics, their cooling system and support structure. Design of the sensor has been finalized and the mass production is underway. We have also developed a dedicated front-end ASIC, called SliT128A, directly wire-bonded to the circuit. In this talk, the design and the status of the preparation of the tracker system is presented, including the characterization of the sensors, the operation of SliT128A with the sensors wire-bonded and the FPC development. Consideration of the backend electronics, DAQ strategy and reconstruction software are also presented.
        Speaker: Taikan Suehara (Kyushu University)
        Slides
      • 11:36 AM
        Modules and Front-End Electronics Developments for the ATLAS ITk Strips Upgrade 18m
        The ATLAS experiment is currently preparing for an upgrade of the tracking system in the course of the High Luminosity LHC, scheduled for 2024. The existing Inner Detector will be replaced by an all-silicon Inner Tracker (ITk) with a pixel detector surrounded by a strip detector. The ITk strip detector consists of a four layer barrel and a forward region composed of six discs on each side of the barrel. The basic unit of the detector is the silicon-strip module, consisting of a sensor and one or more hybrid circuits that hold the read-out electronics. The geometries of the barrel and end-cap modules take into account the regions that they have to cover. In the central region, the detectors are rectangular with straight strips, whereas on the forward region the modules require wedge shaped sensors with varying strip length and pitch. The current prototyping phase has resulted in the ITk Strip Detector Technical Design Report (TDR), which kicks-off the pre-production readiness phase at the involved institutes. In this contribution we present the current status of R&D of the ITk Strip Detector modules and read-out electronics.
        Speaker: Garcia-Argos Carlos (C)
        Slides
      • 11:54 AM
        Staves and Petals: Multi-module local support structures of the ATLAS ITk Strips Upgrade 18m
        The ATLAS Inner Tracker (ITk) is an all-silicon tracker that will replace the existing inner detector at the Phase-II Upgrade of ATLAS. The outermost part of the tracker consists of the strips tracker, in which the sensors elements consist of silicon micro-strip sensors with strip lengths varying from 1.7 to up to 10 cm. The current design, at the moment under internal review in the Strips part of the Technical Design Report (TDR), envisions a four-layer barrel and two six-disk endcap regions. The sensor and readout units (“modules”) are directly glued onto multi-module, low-mass, high thermal performance carbon fiber structures, called “staves” for the barrel and “petals” for the endcap. They provide cooling, power, data and control lines to the modules with a minimal amount of external services. An extensive prototyping program was put in place over the last years to fully characterize these structures mechanically, thermally, and electrically. Thermo-mechanical stave and petal prototypes have recently been built and are currently under intensive study. This contribution will focus on describing the stave and petal structures and the prototyping work carried out so far. In addition, some details of the work carried out on the global supports which will hold the staves and petals in place will also be presented.
        Speaker: Carlos Garcia-Argos (University of Freiburg)
        Slides
      • 12:12 PM
        The Silicon Micro-strip Upstream Tracker for the LHCb Upgrade 18m
        A comprehensive upgrade of the LHCb detector is foreseen for the long shutdown of the LHC in 2019/20 (LSII). The upgrade has two main goals: enabling the experiment to operate at an up to five times higher instantaneous luminosity and increasing trigger efficiencies by substituting the current hardware trigger by a software one. As part of the upgrade, the existing TT tracking station in front of the LHCb dipole magnet will be replaced by a new silicon micro-strip detector, the Upstream Tracker (UT). Similar to the TT, the UT will consist of four planar detection layers covering the full acceptance of the experiment. In total, the detector will use about 1000 silicon sensors and 5000 ASICs. Sensor R&D concentrates on three advanced features that are being considered: a quadrantile cut-out for the innermost sensors to optimize the detector coverage around the LHC beam pipe, an embedded pitch adapter implemented as a double metal layer, and strip-side contacts for connecting the bias voltage through the silicon bulk to the backplane. A new radiation-hard front end readout chip for the UT is being developed in 130 nm TSCM technology. It incorporates 128 input channels with the complete DAQ chain integrated: preamplifier, shaper and a 6-bit ADC, pedestal and common-mode subtraction, and zero-suppression as well as data serialization. Measurements on a full-featured prototype chip are well advanced and results from these tests will be shown. Detector modules host 4 or 8 ASICs and are mounted onto the front and back of 130 cm long staves that cover the full height of the detector acceptance. The staves consist of light-weight foam embedded between two sheets of carbon fibre. The cooling of the silicon sensors and the front-end chips is done via embedded titanium cooling pipes, through which innovative bi-phase C02 is circulated as coolant. The progress of this system will also be discussed. Output signals and control signals, low-voltage power for the front-end chips and bias voltage for the silicon sensors are transported along the staves via kapton flex cables that are glued onto both at sides of the stave. Each of these cables carry up to 120 high speed differential pairs with a total of 38.4Gbps and 8A of current to power up to 24 ASICs while maintaining a minimal material budget and being easy to manufacture. The design solutions and results of prototype iterations will be presented. The detector design presents several practical challenges. These include a retractable detector frame, a light-weight detector box that will seal directly around the LHC beam pipe, and custom-made electronics for signal processing and detector control that are mounted against the detector frame as well as practical implementation issues. These will be discussed too.
        Speaker: Carlos Abellan (U)
        Slides
    • 12:30 PM 2:00 PM
      LUNCH (Bento box) 1h 30m Corridor on the third floor

      Corridor on the third floor

    • 2:00 PM 3:30 PM
      R1-Calorimeters(3) Room 305A

      Room 305A

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Adi Bornheim (Caltech) , Burak Bilki (U)
      • 2:00 PM
        High granularity digital Si-W electromagnetic calorimeter for forward direct photon measurements at LHC 18m
        It is widely expected that the non-linear growth of parton densities at low x predicted from linear QCD evolution will lead to gluon saturation. As a decisive probe of gluon saturation, the measurement of forward (3.5 < y < 5) direct photons in a new region of low x ($10^{−5}$ ∼ $10^{−6}$ ) in proton-nucleus collisions at the LHC is proposed. An extremely high-granularity electromagnetic calorimeter is proposed as a detector upgrade to the ALICE experiment. This Forward Calorimeter (FoCal), is required to discriminate direct photons from decay photons with very small opening angle from neutral pions. To facilitate the design of the upgrade and to perform generic R&D necessary for such a novel calorimeter, a compact digital Si/W sampling electromagnetic calorimeter prototype using Monolithic Active Pixel Sensors(MAPS) with a granularity of 30 × 30 μm and 28 $X_{0}$ has been built and tested with beams. The test beam results have shown the good energy linearity and very small Moliere radius (∼ 11 mm). We will discuss new results of the R&D with electromagnetic showers, in particular a position resolution of better than 30 μm. This precise position determination and the detailed knowledge of the electromagnetic shower shape obtained will provide the crucial capability for two photon separation down to a few mm. The results also show the successful proof of principle of particle counting calorimetry technology for future calorimeter development.
        Speaker: Hongkai Wang (Utrecht University)
        Slides
      • 2:18 PM
        Construction and first beam-tests of silicon-tungsten prototype modules for the CMS High Granularity Calorimeter for HL-LHC 18m
        The High Granularity Calorimeter (HGCAL) is the technology choice of the CMS collaboration for the endcap calorimetry upgrade planned to cope with the harsh radiation and pileup environment at the High Luminosity-LHC. The HGCAL is realized as a sampling calorimeter, including an electromagnetic compartment comprising 28 layers of silicon pad detectors with pad areas of 0.5 — 1.0 cm^2 interspersed with absorbers. Prototype modules, based on hexagonal silicon pad sensors, with 128 channels, have been constructed and tested in beams at FNAL and at CERN. The modules include many of the features required for this challenging detector, including a PCB glued directly to the sensor, using through-hole wire-bonding for signal readout and ~5mm spacing between layers – including the front-end electronics and all services. Tests in 2016 have used an existing front-end chip - Skiroc2 (designed for the CALICE experiment for ILC). We present results from first tests of these modules both in the laboratory and with beams of electrons, pions and protons, including noise performance, calibration with mips, electron energy resolution and precision-timing measurements.
        Speaker: Dr Francesco Romeo (IHEP of Beijing)
        Slides
      • 2:36 PM
        A Si-PAD and Tungsten based electromagnetic calorimeter for the forward direct photon measurement at LHC 18m
        In central heavy ion collisions at very high energy such as at LHC at CERN, one can create a matter of high energy density and high temperature in which quarks and gluon can move freely beyond the boundary of hadrons, called Quark Gluon Plasma (QGP). One of the unanswered questions for on the creation process of QGP is the initial state of nuleons. According to the QCD, the gluon density in small-x region ($𝑥 = 10^{-3}\sim 10^{-5}$) saturates, and such state, referred to Color Glass Condensate (CGC), is consider to be an initial condition of heavy ion collisions. Despite the extensive experimental studies, there is no clear evidence of the creation of CGC so far. By the measurements of direct photon in the forward direction, one can access the CGC picture more clearly compared to hadrons, and obtain a clear picture of initial condition of heavy ion collisions at high energies. In the ALICE experiment at LHC, there is an upgrade plan to construct a Forward Calorimeter (FoCal). The FoCal-E is an electromagnetic calorimeter of FoCal for the direct photon measurement at LHC in the small-x, which covers $3.3<\eta<5.3$. FoCal-E consists of a low granularity layers (LGL) and a high granularity layers (HGL). A LGL module is composed by tungsten layers and silicon PAD (Photo Avalanche Diode) layers, which has 8×8 PADs ($1\times 1\;\mathrm{cm}^2$ per PAD). this measures the energy of electromagnetic showers. A HGL module is composed by MAPS (Monolithic Active Pixel Sensors, $30\times 30\;\mathrm{\mu m}^2$ per pixel) layers which have high position resolution to discriminate between decay photons and direct photons. In this presentation, we discuss the results on LGL from the 2015/2016 test beam experiment at CERN PS and SPS. The energy resolution, linearity, and shower profiles are shown, and those are compared to the simulation results. We also show the performance of the integrate system, i.e. combined LGL and HGL detectors, as a straw-man design of FoCal- E prototype from 2016 test beam data.
        Speaker: Yota Kawamura (U)
        Paper
        proceedings tex file
        Slides
      • 2:54 PM
        Software compensation and particle flow 18m
        The Particle Flow approach to calorimetry requires highly granular calorimeters and sophisticated software in order to reconstruct and identify individual particles in complex event topologies. Within the CALICE collaboration, several concepts for highly granular calorimeters are studied. The Analog Hadron Calorimeter (AHCAL) concept is a sampling calorimeter of tungsten or steel absorber plates and plastic scintillator tiles read out by silicon photomultipliers (SiPMs) as active material. The high calorimeter granularity can also provide a discrimination of the electromagnetic sub-showers in hadron showers. This discrimination can be utilised in an offline weighting scheme, the so-called software compensation technique, to improve the energy resolution for single particles. This presentation will discuss results obtained with the AHCAL physics prototype in several testbeam campaigns with steel and tungsten absorber. It will concentrate on software compensation, its implications for the detector design as well as the use of software compensation techniques in the PandoraPFA particle flow algorithm.
        Speaker: Boruo Xu (D)
        Slides
      • 3:12 PM
        Development of High Precision Polarimeter for the charged particle EDM Experiment 18m
        The **JEDI** (Jülich Electric Dipole moment Investigations) collaboration performs a set of experiments at the COSY storage ring in Jülich, within the R&D phase to search for the Electric Dipole Moments (EDM) of charged particles. A measurement of proton and deuteron EDMs is a sensitive probe of yet unknown CP violation. The method of charged particle EDM search will exploit stored polarized beams and observe a minuscule rotation of the polarization axis as a function of time due to the interaction of a finite EDM with large electric fields. The key challenge is the provision of a sensitive and efficient method to determine the tiny change of the beam polarization. The elastic scattering of the polarized beam particles off target with highest analyzing power will provide the polarimetry reaction. The current status of a dedicated high precision polarimeter concepts will be overviewed. To fulfill specifications, a fast, dense, high resolution (energy and time), and the radioactive hard novel scintillating material is chosen. The LYSO crystals are supposed to be the best candidate for this type of detector system. Also, we have designed a new kind of LYSO coupled to the Silicon PM, very compact modular system, which is under intensive tests right now. In this contribution, results from last experiments with the deuteron and proton (polarized and unpolarized) beams of five different energies up to 300 $MeV$ will be presented.
        Speaker: Irakli Keshelashvili (Forschungszentrum Jülich Gmbh Central Institute of Engineering Electronics and Analytics ZEA-2 - Electronic Systems)
        Slides
    • 2:00 PM 3:30 PM
      R2-Gaseous detectors(1) Room 305C

      Room 305C

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Antonio Amoroso (University of Turin and INFN) , Bo Yu (Brookhaven National Lab)
      • 2:00 PM
        Innovative design and construction technique for the Cylindrical GEM detector for the BESIII experiment 18m
        Gas detector are very light instrument used in high energy physics to measure the particle properties: position and momentum. Through high electric field is possible to use the Gas Electron Multiplier (GEM) technology to detect the particles and to exploit the its properties to construct a large area detector, such as the new IT for BESIII. The state of the art in the GEM production allow to create very large area GEM foils (up to 50x100 cm2) and thanks to the small thickness of these foil is it possible to shape it to the desired form: a Cylindrical Gas Electron Multiplier (CGEM) is then proposed. The innovative construction technique based on Rohacell, a PMI foam, will give solidity to cathode and anode with a very low impact on material budget. The entire detector is sustained by permaglass rings glued at the edges. These rings are use to assembly the CGEM together with a dedicated Vertical Insertion System and moreover there is placed the On-Detector electronic. The anode has been improved w.r.t. the state of the art through a jagged readout that minimize the inter-strip capacitance. The mechanical challenge of this detector requires a precision of the entire geometry within few hundreds of microns in the whole area. In this presentation will be presented an overview of the construction technique and the validation of this technique through the realization of a CGEM and its first tests. These activities are performed within the framework of the BESIIICGEM Project (645664), funded by the European Commission in the action H2020-RISE-MSCA-2014.
        Speaker: Antonio Amoroso (University of Turin and INFN)
        Paper
        Slides
      • 2:18 PM
        A Cylindrical GEM Inner Tracker for the BESIII experiment at IHEP 18m
        The Beijing Electron Spectrometer III (BESIII) is a multi-purpose detector that collects data provided by the collision in the Beijing Electron Positron Collider II (BEPCII), hosted at the Institute of High Energy Physics of Beijing. Since the start of its operation, BESIII has collected the world's largest sample of J/psi and psi(2s). Due to the unprecedent luminosity of the BEPCII, the most inner part of the Multilayer Drift Chamber (MDC) is showing aging effects. It has been proposed an replacement based on the new technology of Cylindrical Gas Electron Multipliers (CGEM). The CGEM-IT project will deploy several new features and innovation with respect the other state-of-art GEM detector: the µTPC and analog readout, with time and charge measurements will allow to reach the 130 µm spatial resolution in 1 Tesla magnetic field requested by the BESIII collaboration; the Rohacell, a PMI foam, will give solidity to cathode and anode, with very low impact on material budget; the jagged anode will allow to reduce the interstrip capacitance. In this presentation, an update of the status of the project will be presented, with a particular focus on the results with planar and cylindrical prototypes with cosmic rays and test beams data. These results are beyond the state of the art for GEM technology in magnetic field.The CGEM-IT project has been founded by the European Commission in the action H2020-RISE-MSCA-2014.
        Speaker: Mr Riccardo Farinelli (INFN Sezione di Ferrara)
        Slides
      • 2:36 PM
        Upgrade of the CMS Muon Spectrometer in the forward region with the GEM technology 18m
        The Large Hadron Collider (LHC) will be upgraded in several phases that will allow to significantly expanding its physics program. After the expected long shutdown in 2018 (LS2) the accelerator luminosity will be increased to 2 − 3 × 1034 cm^−2s^−1 exceeding the design value of 1 × 1034 cm^−2s^−1 allowing the CMS experiment to collect approximately 100 fb^−1/year. A subsequent upgrade in 2022-23 will increase the luminosity up to 5 × 1034 cm^−2s^−1. The CMS muon system must be able to sustain a physics program after the LS2 shutdown that 
maintains sensitivity for electroweak scale physics and for TeV scale searches similar to what 
was achieved up to now. To cope with the corresponding increase in background rates and trigger requirements the installation of additional sets of muon detectors, referred to as GE1/1, GE2/1 and ME0 
 that use Gas Electron Multiplier (GEM) technology has been planned. While the installation of the GE1/1 chambers has been already approved and scheduled by 2019/20, the GE2/1 and ME0 project are now in the final phase of review. We present an overview of the Muon Spectrometer upgrade using the GEM technology, the details of the ongoing GE1/1 chambers production with the first results of the Quality Assurance tests performed on a such a chambers as well as the design and the technical solution adopted for the foreseen GE2/1 and ME0 chambers.
        Speaker: Michele Bianco (C)
        Slides
      • 2:54 PM
        Performance of Triple GEM Detector in X-Rays and Beta Particles Imaging 18m
        A triple gas electron multiplier (GEM) detector with an active area of 10x10 cm2 was constructed and tested for x-rays imaging using a 256 channel 2D x-y strips readout. The study includes optimization of GEM operating high voltage, x-ray tube distance, x-ray tube high voltage, the best x-ray filter, best ratio of Ar/CO2 gas mixture. A 90Sr beta source also was used. The result of the study shows a good ability of GEM detector for x-ray 2D imaging and beta particles tracking.
        Speaker: Mr Mohammad AlAnazi (King Abdulaziz City for Science and Technology (KACST))
      • 3:12 PM
        An improved self-stretching GEM assembly technique 18m
        We have improved the self-stretching GEM assembly technique that was initially developed at CERN for the CMS GEM upgrade project. With this improved technique, we can build GEM detectors at a scale of > 1m that still preserve very good gain uniformity. The technique results in high-quality stretching of GEM foils and good gas tightness in GEM detectors. This report presents details of the improved self-stretching technique for large-size GEM assembly and some test results of a large-size GEM prototypes built with this technique.
        Speaker: Prof. Jianbei Liu (University of Science and Technology of China)
        Slides
    • 2:00 PM 3:30 PM
      R3-Trigger and data acquisition systems(3) Room 305E

      Room 305E

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Louis Helary (CERN) , Ralf SPIWOKS (CERN)
      • 2:00 PM
        A multi-chip data acquisition system based on a heterogeneous system-on-chip platform. 18m
        The development of pixel detectors for future high-energy physics experiments requires flexible high-performance readout systems supporting a wide range of current and future device generations. The versatile readout system of the Control and Readout Inner tracking Board (CaRIBou) targets laboratory and high-rate test-beam measurements with a multitude of detector prototypes. Under the project umbrella, application-specific chipboards and a common interface card have been developed for a variety of pixel detector readout ASICs and active sensors. The boards are hosted by a commercial evaluation kit (ZC706). This talk focuses on the data acquisition system (DAQ) based on a heterogeneous Xilinx Zynq All Programmable System-on-Chip (AP SoC). The device integrates the software programmability of an ARM-based processor with the hardware programmability of an FPGA, enabling acceleration of the design, verification, test and commissioning processes. The CPU handles the slow control of the system, while the FPGA fabric performs data processing and data encapsulation in UDP datagrams moved by a Direct Memory Access (DMA) device through the High Performance Advanced Extensible Interface (AXI) port directly to the shared Random Access Memory (RAM). Further, data in RAM is accessed by the CPU for prompt analysis (data-quality monitoring, calibration, etc.) or is transferred eventually to a storage server over the Ethernet link using a standard Linux network stack and the DMA. Thanks to the fully capable dual-core processor running a Linux operating system, the DAQ board provides the unique user experience of a regular fully-functional remote terminal able to execute high level code (such as Python scripts). Moreover, as the code runs locally on the CPU integrated directly or indirectly (through the FPGA fabric) with the given ASIC, operations involving high input/output (I/O) activity (e.g. chip equalization) are not affected by network delays. The logic modules implemented in the FPGA fabric are available to the end user through the open source Linux device drivers maintained by the Xilinx community. In order to facilitate the creation of an embedded Linux distribution, CaRIBou provides a layer to the Yocto build framework supported by a large community of open-source and industrial developers. The talk presents the design of the SoC-based DAQ system, its building blocks and shows examples of the achieved functionality and performance for the CLICpix2 readout ASIC and the C3PD active CMOS sensor.
        Speaker: Adrian Fiergolski (CERN)
        Slides
      • 2:18 PM
        Upgrade of the ATLAS Monitored Drift Tube Electronics for the HL-LHC 18m
        To cope with large amount of data and high event rate expected from the planned High-Luminosity LHC (HL-LHC) upgrade, the ATLAS monitored drift tube (MDT) readout electronics will be replaced. In addition, the MDT detector will be used at the first-level trigger to improve the muon transverse momentum resolution and reduce the trigger rate. A new trigger and readout system has been proposed. Prototypes for two frontend ASICs and a data transmission board have been designed and tested, detailed simulation of the trigger latency has been performed, and segment-finding and track fitting algorithms have been developed. We will present the overall design of the trigger and readout system and show latest results from various prototype studies.
        Speaker: Junjie Zhu (University of Michigan)
        Slides
      • 2:36 PM
        Challenges and performance of frontier technology applied to an ATLAS Phase-I calorimeter trigger board dedicated to jet identification 18m
        The 'Phase-I' upgrade of the Large Hadron Collider (LHC), scheduled to be completed in 2021, will lead to an enhanced collision luminosity of 2.5x10e34cm-2s-1. To cope with the new and challenging accelerator conditions, all the CERN experiments have planned a major detector upgrade to be installed during the associated experimental shutdown period. One of the physics goals of the ATLAS experiment is to maintain sensitivity to electroweak processes despite the increased number of interactions per LHC bunch crossing. To this end, the component of the first level hardware trigger based on calorimeter data will be upgraded to exploit fine-granularity readout using a new system of Feature EXtractors (FEXs), which each uses different physics objects for trigger selection. There will be three FEX systems in total, with this contribution focusing on the first prototype of the jet FEX (jFEX). This system identifies jets and large area tau candidates while also calculating global variables such as transverse energy sums and missing transverse energy. The jFEX prototype is characterised by four large Xilinx Ultrascale Field Programmable Gate Arrays (FPGAs), XCVU190FLGA2577, so far the largest available on the market, capable of handling a data volume of more than 3 TB/s of input bandwidth. The choice of such large devices was driven by the requirement for large input bandwidth and processing power. This comes from the need to exploit high granularity calorimeter information and also run several jet identification algorithms within the few hundred nanoseconds latency budget (~350 ns). This presentation will report on the hardware design challenges and adopted solutions to preserve signal integrity within a densely populated high signal speed ATCA board. The parallel simulation activity that supported and validated the board design will also be presented. Particular emphasis will be given to the large FPGA power consumption effects on the boards. This was assessed via dedicated thermal simulation and cross-checked with a campaign of measurements. Preliminary results will also be presented from tests both at CERN and Mainz, based on the first jFEX prototype from December 2016.
        Speaker: Christian Kahra
        Slides
      • 2:54 PM
        RDMA optimizations on top of 100 Gbps Ethernet for the upgraded data acquisition system of LHCb 18m
        The LHCb experiment will be upgraded in 2018-2019 to change its operation to a triggerless full-software readout scheme from Run3. This results in increasing the load of the event building and filtering farm by a factor of 40. The farm will need to be able to handle all the 40 MHz rate of the particle collisions. The network of the data acquisition system is facing with a target speed of 40 Tb/s, aggregated by 500 nodes. It requires the links to be capable of delivering the data with at least 100 Gbps speeds per direction. Three solutions are being evaluated: Intel® Omni-Path Architecture, 100G Ethernet and EDR InfiniBand. Intel® OPA and EDR IB runs by Remote Direct Memory Access. Ethernet uses TCP/IP or UDP/IP by default, which involves significant CPU load. However, there are solutions to implement RDMA-enabled data transfer via Ethernet as well. These technologies are called RoCE (RDMA over Converged Ethernet) and iWARP. We present first measurements with such technologies on 100 Gbps equipment in respect of the data acquisition use-case.
        Speaker: Mr Balazs Voneki (CERN)
        Slides
      • 3:12 PM
        Data transmission system for 2D-SND at CSNS 18m
        China Spallation Neutron Source (CSNS) is the first high-performance pulsed neutron source in China, which will meet the increasing fundamental research and technique applications demands domestically and overseas. Scintillator neutron detector (2D-SND) is the detector on the General Purpose Powder diffractometer (GPPD) of CSNS. It consists of 36 banks. Every bank has 192 channels. 2D-SND is planned to go into service in 2018. At present, 2D-SND have been made and relative systems including electronics system, data acquisition (DAQ) system, data transmission system and data analysis system have been constructed essentially. Electronics system is used to get signals from the detector, amplify these signals, convert them to digital data, construct data to events and finally send events to DAQ system. Electronics system consists of 36 modules corresponding 36 banks of detector and every module consists of 192 electronic channels corresponding 192 channels on relative bank of detector. Every electronic channel gets signals, disposes signals and sends events independently. Electronics system is based on SiTCP to send events. DAQ system is used to read events from electronics system, save events in local files and Network File System (NFS). The user interface of DAQ system is based on QT and the bottom program of it is adopted multithreading technology to read events from each electronic module and save them to each file. Data analysis system is used to receive events from data transmission system, reconstruct events in the form of Nexus, analyze reconstructed events and display results in the form of charts. The functions of analysis and display in data analysis system are realized by Python. The functions of receive events, reconstruction in it are realized by C++ Dynamic Link Library (DLL) which is called by the program of Python. Multithreading technology is adopted in the program of C++ DLL. There are three threads in it. One is used to receive events. The second is used to reconstruct. The third is used to send reconstructed events to back end program of analysis and display. The data transmission system is used to get events from DAQ system, pick good events and send these good events to data analysis system. The whole system is written in C which as a process oriented language offers an easy way to dispose data with flexibility and high efficiency. The program of data transmission system is designed to multithreading in C. It means that events of each electronic module are disposed independently in respective thread. The disposal includes reading file to get its events, picking these events and sending good events being picked. Multithreading technology makes system of multi-tasking and parallel processing work more efficiently. For the convenience of event reconstruction in data analysis system, a pubic buffer is used in data transmission system to collect good events from each electronic module and it is called in every disposal thread for the purpose of sending events of every electronic module together to data analysis system. A public buffer offers an environment of resource sharing and integration in a simple way. The mutex lock implements the mutually exclusive access to shared resource. The application of the mutex lock accompanying with the use of public buffer ensures that every event stored in public buffer is complete and correct. The interface between DAQ system and data transmission system in it is adopted NFS which provides an environment with capability of mutual interference. It means that DAQ system saves events sent to data transmission system in NFS and data transmission system reads events from NFS. Distributed Information Management System (DIM) developed by European Organization for Nuclear Research (CERN) is adopted to be the interface between data transmission system and data analysis system. It provides a method to realize loose coupling, meanwhile it is very efficient in data transmission. More concretely, the mechanism of DIM is based on C/S pattern. DIM server is in charge of sending data which is put in the data transmission system. DIM client is in charge of receiving data which is put in the data analysis system. DIM server can keep sending data no matter DIM client is active or dead to realize loose coupling. The data transmission system together with 2D-SND and other relative systems has been applied in neutron beam experiment successfully. With the common framework, it can easily be expanded and improved to fit for applications of other detectors at CSNS or other place. In late development, the interface between DAQ system and data transmission system should be improved to fulfil real-time on data transmission.
        Speaker: Ms Dongxu Zhao (China Spallation Neutron Source)
        Slides
    • 2:00 PM 3:30 PM
      R4-Semiconductor detectors(3) Room 307

      Room 307

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: K.K. Gan (The Ohio State University) , Prof. Kazuhiko Hara (University of Tsukuba)
      • 2:00 PM
        The LHCb Vertex Locator Upgrade 18m
        The Large Hadron Collider Beauty detector is a flavour physics detector, designed to detect decays of b- and c-hadrons for the study of CP violation and rare decays. At the end of Run-II, many of the LHCb measurements will remain statistically dominated. In order to increase the trigger yield for purely hadronic channels, the hardware trigger will be removed and the detector will operate at 40 MHz. This, in combination with the five-fold increase in luminosity necessitates radical changes to LHCb’s electronics with entire subdetector replacements required in some cases. The Vertex Locator (VELO) surrounding the interaction region is used to reconstruct the collision points (primary vertices) and decay vertices of long-lived particles (secondary vertices). The upgraded VELO modules will each be equipped with 4 silicon hybrid pixel tiles, each read out with by 3 VeloPix ASICs. The highest occupancy ASICs will have pixel hit rates of 900 Mhit/s and produce an output data rate of over 15 Gbit/s, with a total rate of 1.6 Tbit/s anticipated for the whole detector. The VELO upgrade modules are composed of the detector assemblies and electronics hybrid circuits mounted onto a cooling substrate. The modules are located in vacuum, separated from the beam vacuum by a thin custom made foil. The foil will be manufactured through a novel milling process and possibly thinned further by chemical etching. The front-end hybrid hosts the VeloPix ASICs and a GBTx ASIC for control and communication. They hybrid is linked to the the the opto-and-power board (OPB) by 60 cm electrical data tapes running at 5 Gb/s. The tapes must be vacuum compatible and radiation hard and are required to have enough flexibility to allow the VELO to retract during LHC beam injection. The OPB is situated immediately outside the VELO vacuum tank and performs the opto-electrical conversion of control signals going to the front-end and of serial data going off-detector. The board is designed around the Versatile Link components developed for high-luminosity LHC applications. From the OPB the detector data are sent through 300 m of optical fibre to LHCb's common readout board (PCIe40). The PCIe40 is an Altera Arria10-based PCI-express control and readout card capable of 100 Gb/s data throughput. The PCIe40 firmware is designed as a series of common components with the option for user-specific data processing. The common components deal with accepting the input data from the detector over the GBT protocol, error-checking, dealing with reset signals, and preparing the data for the computing farm. The VELO-specific code would, for example, perform clustering of hits and time reordering of the events scrambled during the readout. An additional challenge is the non uniform nature of the radiation damage, which results in requiring a guard ring design with excellent high voltage control. In addition, the n-in-p design requires the guard ring to be on the chip side making the high voltage reach the vicinity of the ground plane (about 30 $\mu$m apart). This requires a high voltage tolerant setup for irradiated assemblies which can be achieved using a vacuum chamber. The performance of the prototype sensors has been investigated in a test beam in which a dedicated telescope system was created read out by Timepix3 ASICs. Several different tests of the of the sensor prototypes were performed before and after irradiation. A collection of preliminary results will be presented, as well as a comparison of the performance of the different sensor prototypes. The design of the complete VELO upgrade system will be presented with the latest results from the R\&D. The LHCb upgrade detector will be the first detector to read out at full LHC rate of 40 MHz. The VELO upgrade will utilise the latest detector technologies to read out at this rate using while maintaining the necessary radiation hard profile and minimising the detector material.
        Speaker: Kazuyoshi Akiba (IF-UFRJ)
      • 2:18 PM
        3D diamond detectors for tracking and dosimetry 18m
        Advances in the laser assisted transformation of diamond into amorphous-carbon has enabled the production of a new type of particle detector - 3D diamond. When compared to conventional planar technologies, previous work has proven a 3D geometry to improve the radiation tolerance of detectors fabricated in silicon. This work demonstrates the same principle in diamond, with the aim of producing an accurate particle detector tolerant to extreme radiation fields. We present the latest fabrication methods, including the use of a spatial light modulator to produce a 3D array of ~1um diameter low resistivity electrodes, and discuss the fabrication of several devices in both single-crystal and polycrystalline CVD diamond. In order to optimise the 3D geometry, devices were fabricated with various cell geometries, and measurements obtained from various beams, all of which shall be presented. Outside the field of high energy particle physics, a potential application for this technology includes medical dosimetry; where the high resilience to radiation damage, operation at low bias voltage with well defined active volume, in addition to high compatibility to human tissue, makes their use desirable. We shall present results obtained with 3D diamond detectors for dosimetry applications.
        Speaker: Dr Iain Haughton (The University of Manchester)
        Slides
      • 2:36 PM
        Radiation Monitoring with Diamond Sensors for the Belle-II Vertex Detector 18m
        The Belle II detector is currently under construction at the SuperKEKB electron-positron high-luminosity collider that will provide an instantaneous luminosity 40 times higher than that of KEKB. Therefore the Belle-II VerteX Detector (VXD) will operate in a very harsh environment. A radiation monitoring and beam abort system is needed to safely operate the VXD detector in these conditions.  The Belle II radiation monitoring system will be based on 20 single crystal diamond sensors placed in 20 key positions in the vicinity of the interaction region. In this contribution we describe the system design and we present the procedures followed for the characterisation and calibration of the diamond sensors. We discuss also the performance of the prototype system during the first SuperKEKB commissioning phase in February-June 2016.
        Speaker: Chiara La Licata (for the BEAST II Collaboration)
        Slides
      • 2:54 PM
        Discussion time 36m
    • 3:30 PM 4:30 PM
      POSTER & Break 1h Corridor on the third floor

      Corridor on the third floor

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
    • 4:30 PM 6:18 PM
      R1-Particle identification(1) Room 305A

      Room 305A

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Miroslav Gabriel (Max Planck Institute for Physics) , Prof. Wang Yi (Tsinghua University)
      • 4:30 PM
        Assembly of a Silica Aerogel Radiator Module for the Belle II ARICH System 18m
        We have been in the process of developing the ARICH detector for identifying charged $\pi $ and $K$ mesons in a super-B factory experiment (Belle II) to be performed at the High Energy Accelerator Research Organization (KEK), Japan. The ARICH detector is a ring-imaging Cherenkov counter that uses silica aerogel as a radiator and hybrid avalanche photo-detectors as position-sensitive photo-sensors which are installed at the endcap of the Belle II spectrometer. The particle identification performance of the ARICH detector is basically measured by the Cherenkov angular resolution and the number of detected photoelectrons. At momenta below 4 GeV/$c$, to achieve high angular resolution, the refractive index of the aerogel must be approximately 1.05. A scheme for focusing the propagation pass of emitted Cherenkov photons on the photo-detectors is introduced by using multiple layers of aerogel tiles with different refractive indices. To increase the number of detected photoelectrons, the aerogel is expected to be highly transparent. A support module to install the aerogel tiles is comprised of a cylindrical shape with a diameter of approximately 2.3 m. It is important to reduce adjacent boundaries between the aerogel tiles where particles cannot be clearly identified. Accordingly, larger-sized, crack-free aerogel tiles are therefore preferred. Installing the tiles to the module by trimming them with a water jet cutter and avoiding optical degradation of the aerogel by moisture adsorption during long-term experiments should ultimately result in highly hydrophobic conditions. By 2013, our group established a method for producing, with high yield, large-area aerogel tiles (18 cm $\times $ 18 cm $\times $ 2 cm; approximately tripled) that fulfilled optical performance level requirements (transmission length ~40 mm at 400-nm wavelength; almost doubled). This enabled us to divide the module into 124 segments to install the trimmed aerogel tiles. Two aerogel tiles with refractive indices of 1.045 and 1.055 were installed to each segment (total of 248 tiles), thus resulting in a radiator thickness of 4 cm. By 2014, 450 aerogel tiles were mass-produced and optically characterized. After water jet machining, the optical parameters were re-investigated. Ultimately, selected aerogel tiles were successfully installed to the module by the end of 2016.
        Speaker: Makoto Tabata (Chiba University)
        Slides
      • 4:48 PM
        The Aerogel Ring Image Cherenkov counter for particle identification in the Belle II experiment 18m
        The Belle II spectrometer, an upgrade of the Belle detector, is under construction together with the SuperKEKB electron-positron accelerator at KEK in Japan to search for the New Physics beyond the Standard Model using 50 times higher statistics of $e^+-e^-$ collisions of the Belle experiment. An aerogel ring imaging Cherenkov (ARICH) counter will be installed into the end cap region of the new spectrometer as a particle identification device to secure $4\sigma$ separation of charged kaons and pions up to momentum of 3.5 GeV. We developed several techniques to maximize the pion-kaon separation performance in 1.5 T magnetic field and a limited space available between the tracker and the calorimeter. Two layers of silica aerogel radiators with different refraction indices are used to focus the Cherenkov lights. We have established a method to process the aerogel radiators with flexible refraction index and high transparency. Hybrid Avalanche Photo Detector (HAPD), which has 144 pixels with 5 mm pitch, was developed to detect the positions of incoming photons in the high magnetic field. Two steps of readout electronics of the HAPDs was introduced in order to process the signals and to merge data and reduce numbers of cables to the outside of the detector. A frontend board attached to the HAPD reads out signals to digitize photon hit patterns; a merger board collects digitized data from several of the frontend boards (up to 6) to send them to the Belle II global data acquisition system. In total, 248 segments of the silica aerogel radiators cover a plane of the end cap, while 420 HAPDs are located in another plane 20 cm behind the plane. Developments and productions of these detector components were already finished in 2016 and the ARICH counter is under construction, scheduled to be installed into the Belle II detector in summer of 2017. All the segments of the aerogel tiles are fully installed while installation of the HAPDs and the readout electronics are ongoing in parallel with detector test operation using cosmic rays. Cherenkov ring images of cosmic rays were collected using the framework of the Belle II global data acquisition system to study detector response and readout performance. A LED light injection system to monitor the photo detectors was also developed and installed. In addition to the construction. We have also developed slow control software systems of the ARICH detector and the readout system including power supply for high voltages and low voltages. In this presentation, we will overview the details of the ARICH counter and its construction with results of the cosmic ray test and then show the expected performance after installation to the Belle II detector.
        Speaker: Tomoyuki Konno (KEK)
        Slides
      • 5:06 PM
        High rate time of flight system for FAIR-CBM 18m
        The Compressed Baryonic Matter experiment (CBM) is one of the big experiments of the international Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany. CBM aims to investigate rare probes such as charmed hadrons, multiple strange baryons, di-electrons and di-muons as messengers of the dense phase of strongly interacting matter with unprecedented accuracy. This is achieved by designing all components of the experiment for an interaction rate of 10MHz for the largest reaction systems. Charged hadron identification in the system is realized via the Time-of-Flight (TOF) method. For this purpose the CBM-TOF collaboration designed a TOF wall composed of Multi-gap Resistive Plate Chambers (MRPC). Due to the high interaction rate the key challenge is the development of high rate MRPCs above 25 kHz/cm2 which becomes possible due to the development of low resistive glass with extremely good quality. Based on the low resistive glass, we designed several high rate MRPCs of different structure and readout electronics. A couple of beam test have been performed and excellent results were obtained. The TDR of TOF has been approved and the production of low resistive glass, MRPC modules and electronics proceeds smoothly. In this article we present the actual design of the TOF-wall. The design of high rate MRPC, thin glass MRPC, readout chain and beam test results are also discussed in detail.
        Speaker: Prof. Yi Wang (Tsinghua University)
        Slides
      • 5:24 PM
        Endcap Disc DIRC for PANDA at FAIR 18m
        The PANDA detector at the future FAIR facility at GSI is planned as a fixed-target experiment for proton-antiproton collisions at momenta between 1.5 and 15\,GeV/c. It will be used to address open questions in hadronic physics. In order to achieve excellent particle identification, two different DIRC detector concepts have been developed. This talk describes the Endcap Disc DIRC detector, which will cover the forward endcap region of the PANDA target spectrometer and to provide a $4\sigma$ separation of pions and kaons up to a momentum of 4\,GeV/c for polar angles from $5^\circ$ to $22^\circ$. The main advantage of the actual design is the compact modular structure. It consists of a synthetic fused silica radiator disk, which is divided into 4 identical quadrants. The readout system consists of 108 focusing elements with attached MCP-PMTs, which have the task to collect, focus and register the Cherenkov photons produced by the particle traversing the radiator. This new detector concept requires the development of dedicated reconstruction and PID algorithms, which permit an efficient analysis of the measured time-correlated photon patterns. The performance of a possible online reconstruction system is under investigation with a design for a single Virtex 4 FPGA card calculating the Cherenkov angle from the measured hit pattern and related tracking information for each event with a rate of up to 20\,MHz. Time- and event-based Monte-Carlo simulations within the PandaRoot framework have been used to analyse and evaluate the PID performance for high momentum particles. In order to determine the future overall performance of PANDA at realistic conditions, the benchmark channel $p\bar p \rightarrow f_0\pi^0 \rightarrow K^+K^-$ with suitable background events has been studied by including all tracking information and likelihood values from surrounding detectors. Results from various testbeams during the last years were used to validate the PID performance for the desired momentum range.
        Speaker: Mustafa Schmidt (Justus Liebig University Giessen)
        Slides
      • 5:42 PM
        Barrel time-of-flight detector for the PANDA experiment at FAIR 18m
        The PANDA experiment at the new FAIR facility at GSI will perform high precision experiments in the strange and charm quark sector using cooled beams of antiprotons at high luminosity, in the momentum range of 1.5 GeV/c to 15 GeV/c. For the identification of low momentum charged particles with extreme accuracy, the barrel time-of-flight (TOF) detector is one of the key components of PANDA. Its main requirement is to achieve a time resolution of σ<100ps as well as a large solid angle coverage at high collision rates. The final Barrel ToF consists of 16 independent segments, located azimuthally at 50cm radial distance from the beam pipe. Every segment contains a sensitive area, that is covered by 2x60 single Scintillator Tile (SciTil). Each SciTil (90 x 30 x 5 mm³) is read out by 4 Silicon Photomultipliers (SiPM) on both ends. In 2016, a beam test at CERN exposed the SciTil with 6 GeV/c secondary beam where σ<60 ps time resolution was reached. In this talk we will present the further optimization of operational conditions and time resolution.
        Speaker: Nicolaus Kratochwil (Österreichische Akademie der Wissenschaften, Stefan Meyer Institut für Subatomare Physik, Wien, Austria)
        Slides
      • 6:00 PM
        Commissioning and Initial Performance of the Belle II iTOP PID Subdetector 18m
        High precision flavor physics measurements are an essential complement to the direct searches for new physics at the LHC. Such measurements will be performed using the upgraded Belle II detector that will take data at the SuperKEKB accelerator. With an anticipated 40-fold increase in the integrated luminosity of KEKB, the detector systems must operate efficiently at much higher rates than the original Belle detector. A central element of the detector upgrade is the barrel particle identification system. Belle II has built and installed an imaging-Time-of-Propagation (iTOP) detector. The iTOP uses quartz as the Cherenkov radiator and the photons are transported down the quartz bars via total internal reflection with a spherical mirror at the forward end to reflect forward-going photons to the backward end, where they are imaged onto an array of segmented Micro-Channel Plate Photo-Multiplier Tubes. The system is readout using Giga-sample per second waveform sampling Application-Specific Integrated Circuits that provide precise photon timing. The combined timing and spatial distribution of the photons for each event are used to determine particle species. A summary of commissioning and current status will be provided.
        Speaker: Gary Varner (University of Hawaii)
        Slides
    • 4:30 PM 6:18 PM
      R2-Experimental detector systems(3) Room 305C

      Room 305C

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Christian Bohm (Stockholm University) , Prof. Jin Li (IHEP/THU)
      • 4:30 PM
        SciFi - A large Scintillating Fibre Tracker for LHCb 18m
        The LHCb detector will be upgraded during the Long Shutdown 2 (LS2) of the LHC in order to cope with higher instantaneous luminosities and to read out the data at 40MHz using a trigger-less read-out system. The current LHCb main tracking system, composed of an inner and outer tracking detector, will not be able to cope with the increased particle multiplicities and will be replaced by a single homogenous detector based on scintillating fibres. The new Scintillating Fibre (SciFi) Tracker covers a total detector area of 340 m2 and should provide a spatial resolution for charged particles better than 100 µm in the bending direction of the LHCb spectrometer. The detector will be built from individual modules (0.5 m × 4.8 m), each comprising 8 fibre mats with a length of 2.4 m as active detector material. The fibre mats consist of 6 layers of densely packed blue emitting scintillating fibres with a diameter of 250 µm. The scintillation light is recorded with arrays of state-of-the-art multi-channel silicon photomultipliers (SiPMs). A custom ASIC will be used to digitize the SiPM signals. Subsequent digital electronics performs clustering and data-compression before the data is sent via optical links to the DAQ system. To reduce the thermal noise of the SiPM in particular after being exposed to a neutron fluence of up to 10$^{12}$ $n_{eq}$ /cm$^2$, expected for the lifetime of the detector, the SiPMs arrays are mounted in so called cold-boxes and cooled down by 3D-printed titanium cold-bars to -40$^o$ C. The production of fibre mats and modules is in full swing: fibre mats are being produced in four production centers and being assembled at two sites. In parallel the readout electronics is finalized and its series production is prepared. The detector installation is foreseen to start end of 2019. The talk will give an overview of the detector concept and will present the experience from the series production complemented by most recent test-beam and laboratory results.
        Speaker: Ulrich Uwer (H)
        Slides
      • 4:48 PM
        The tracking system at LHCb in run-2: hardware alignment systems, online calibration, radiation tolerance and 4D tracking with timing 18m
        The LHCb experiment is designed to study B and D decays at the LHC, and as such is constructed as a forward spectrometer. The large particle density in the forward region poses extreme challenges to the subdetectors, in terms of hit occupancies and radiation tolerance. Two methods and their results will be presented that show no radiation damage of the gaseous straw tube detector after having received a dose of about 0.2 C/cm2 in the hottest area. The precision measurements at LHCb require accurate alignment of their elements. In run-2 of the LHC the full potential of the state-of-the-art alignment system "RASNIK" is being exploited. Relative movements down to 1 um are being monitored and will be shown for the first time at this conference. High accuracy of the RASNIK data allow to track deformations connected with changing magnetic field configurations, operational interventions and environmental conditions. The RASNIK system also provides crucial input to the software alignment by constraining the so-called "weak-modes", like movements in the longitudinal direction z. The Outer Tracker subdetector is a gaseous straw tube tracker that measures the drift time with a resolution of 2.4 ns. This accuracy implies an improvement of 20% with respect to the run-1 performance, thanks to a new strategy used for the drift time calibration including real-time calibration during data taking deployed in run-2. Interestingly, recent studies show that this superb timing resolution can be combined to measure the time-of-flight of single particles with an accuracy of 0.55 ns. We will show that low momentum protons can be cleanly distinguished from pions. In addition, these pilot studies show the potential of distinguishing primary vertices which occur at different times, which will be crucial for LHCb when operating in the high-luminosity regime as is being proposed after the phase-II upgrade. The possibility is being investigated to use the vertex timing for the measurement of the longitudinal distribution of the unintentional beam population in the nominally empty slots, which requires a timing precision better than about 2.5 ns.
        Speaker: Dr Artur Ukleja (National Centre for Nuclear Research Warsaw)
        Slides
      • 5:06 PM
        CMS Tracker performance in 2016 18m
        In 2016, the CERN Large Hadron Collider (LHC) reached a peak instantaneous luminosity of 1.5x10^34 cm^-2 s^-1, going above the original design and reaching up to 40 interactions per bunch crossing. Under those conditions the CMS tracker managed to have a ~98% efficiency for the data taking period of 2016. This talk will present the performance of the CMS tracker in 2016, for both the Pixel and Strip sub-detectors.
        Speaker: Hugo Delannoy (I)
        Slides
      • 5:24 PM
        The CMS ECAL Upgrade for Precision Crystal Calorimetry at the HL-LHC 18m
        The electromagnetic calorimeter (ECAL) of the Compact Muon Solenoid Experiment (CMS) is operating at the Large Hadron Collider (LHC) in 2016 with proton-proton collisions at 13 TeV center-of-mass energy and at a bunch spacing of 25 ns. Challenging running conditions for CMS are expected after the High-Luminosity upgrade of the LHC (HL-LHC). We review the design and R&D studies for the CMS ECAL crystal calorimeter upgrade and present first test beam studies. Particular challenges at HL-LHC are the harsh radiation environment, the increasing data rates and the extreme level of pile-up events, with up to 200 simultaneous proton-proton collisions. We present test beam results of hadron irradiated PbWO crystals up to fluences expected at the HL-LHC. We also report on the R&D for the new readout and trigger electronics, which must be upgraded due to the increased trigger and latency requirements at the HL-LHC.
        Speaker: Patrizia Barria (University of Virginia, on behalf of the CMS Collaboration)
        Slides
      • 5:42 PM
        Design of the new ATLAS Inner Tracker for the High Luminosity LHC era 18m
        In the high luminosity era of the Large Hadron Collider (HL-LHC), the instantaneous luminosity is expected to reach unprecedented values, resulting in about 200 proton-proton interactions in a typical bunch crossing. To cope with this high rate, the ATLAS Inner Detector is being completely redesigned, and will be replaced by an all-silicon system, the Inner Tracker (ITk). This new tracker will have both silicon pixel and silicon strip sub-systems. The components of the Inner Tracker will have to be resistant to the large radiation dose from the particles produced in HL-LHC collisions, and have low mass and sufficient sensor granularity to ensure a good tracking performance over the pseudorapidity range |η|<4. In this talk, first the challenges and second possible solutions to these challenges will be discussed, i.e. designs under consideration for the pixel and strip modules, and the mechanics of local supports in the barrel and endcaps.
        Speaker: Jike Wang
        Slides
      • 6:00 PM
        Discussion time 18m
    • 4:30 PM 6:18 PM
      R3-Front-end electronics and fast data transmission(1) Room 305E

      Room 305E

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Fukun Tang (The University of Chicago) , Johan Borg (Imperial College London)
      • 4:30 PM
        A readout ASIC for the LHCb Scintillating Fibre (SciFi) tracker 18m
        The LHCb detector will be upgraded during the Long Shutdown 2 (LS2) of the LHC in order to cope with higher instantaneous luminosities and to read out the data at 40MHz using a trigger-less read-out system. The current LHCb main tracking system will be replaced by a single homogenous detector based on scintillating fibres. The detector will be built from 2.5 m long plastic fibres with a diameter of 250um. The scintillation light is recorded with arrays of state-of-the-art multi-channel silicon photomultipliers (SiPMs). Each SIPM sensor provides 128 channels grouped in two silicon dies and packaged together. The electrical SiPM signals are collected and processed by the low Power ASIC for the sCIntillating FIbres traCker (PACIFIC). The 64 channel ASIC comprises for every channel analog processing, digitization, slow control and digital output at a rate of 40MHz. The analog processing includes preamplifier, shaping and integration. The integrator is formed by an interleaved double gated integrator and a track and hold to avoid dead time (one integrator is in reset while the other collects the signal). The output of the integrator is digitized using 3 comparators (non-linear flash ADC). The three bits output is then encoded into two bits and serialized to be transmitted to a readout FPGA used for clustering and data-compression. Some auxiliary blocks are also needed to produce a fully functional device and include voltage references, current references, control DACs, power on reset (POR) circuitry and serializers. PACIFIC has been designed using deep sub-micron technologies and actual implementation uses TSMC130nm process. PACIFICr3 was the first full size prototype providing real measurements of signals from 64 channels and including the analog processing, digital control and serialization. PACIFICr4 corrects some issues found in the r3-prototype and updates some parameters to improve signal collection from the detector. The talk will present the ASIC design concept and provide results from laboratory tests and test-beam measurements. These studies include the characterization of prototypes, measurements with electrical signal and light injection and measurement with a radioactive source (Sr90) using full fibre modules. The test-beam results are in particular important to understand the expected physics performance of the full chain from the fibre to the digital PACIFIC output.
        Speaker: Xiaoxue Han (H)
        Slides
      • 4:48 PM
        CATIROC, a multichannel front-end ASIC to read out the Small PMTs (SPMT) system of the JUNO experiment 18m
        CATIROC (Charge And Time Integrated Read Out Chip) is a complete read-out chip designed to read arrays of 16 photomultipliers (PMTs). It finds a valuable application in the content of the JUNO experiment, the largest Liquid Scintillator Antineutrino Detector ever built, currently under construction in the south of China. A double calorimetry system will be used for the first time ever combining about 18k 20” PMTs and around 36k small PMTs (3”). The CATIROC will be used to read out the small PMTs system and provide the charge measurement up to 400 photoelectrons (70 pC) on two scales of 10 bits and a timing information with an accuracy of 200 ps rms. It is composed of 16 independent channels that work in triggerless mode, auto-triggering on the single photo-electron (p.e.). It is a SoC (System on Chip) that processes analog signals up to the digitization and sparsification to reduce the cost and number of cables. The ASIC performances will be detailed in the paper.
        Speaker: Selma Conforti (OMEGA/IN2P3/CNRS)
        Slides
      • 5:06 PM
        Development of Radiation-Hard ASICs for the ATLAS Phase-1 Liquid Argon Calorimeter Readout Electronics Upgrade 18m
        The new trigger readout electronics system for ATLAS Liquid Argon (LAr) Calorimeter aims to improve granularity of the calorimeter information for the L1 trigger, essential for physics research goals after the phase-1 upgrade. The major R&D activities for front-end readout electronics upgrade include designing a new radiation-hard ADC and a data multiplexing and serialization ASIC to send the data off-detector via optical links. The NevisADC is a radiation-hard four-channel 12-bit 40 MS/s pipeline ADC, which consists of four 1.5-bit Multiplying Digital-to-Analog Converters, with nominal 12-bit resolution, followed by an 8-bit Successive-Approximation-Register analog-to-digital converter to reach an optimization on performance and power consumption. The LArTDS ASIC multiplexes 16 channels of ADC data, then scrambles and serializes the data for transmission over two optical links each with a data transfer rate of 4.8 Gbps. The custom design chips, fabricated in the GF 130 nm CMOS 8RF process, are extensively evaluated and tested. The NevisADC achieves an ENOB of 11 at 40 MS/s target sampling rate, with a latency of 112.5 ns while consuming 45 mW/channel and exhibits no performance degradation after irradiation. The LArTDS has passed the entire design function test with test pattern data and real ADC data. A 48-hours long term stability test shows the bit error rate is bellow 1.2x10^-15 for both high speed serial channels. The ASIC chips architectures and detailed performance results will be presented.
        Speaker: Dr Qiang Wang (Nevis Laboratories, Columbia University)
        Slides
      • 5:24 PM
        TDC based on FPGA of Boron-coated MWPC for Thermal Neutron Detection 18m
        Li Yu, Ping Cao, WeiJia Sun, ManYu Zheng, Ying Zhang and Qi An
        Speaker: Dr li yu (University of Science and Technology of China)
        Slides
      • 5:42 PM
        Radiation-Hard/High-Speed Optical Engine for HL-LHC 18m
        The LHC has recently been upgraded to operate at higher energy and luminosity. In addition, there are plans for further upgrades. These upgrades require the optical links of the experiments to transmit data at much higher speed in a more intense radiation environment. We have designed a new optical transceiver for transmitting data at 10 Gb/s. The device consists of a 4-channel ASIC driving a VCSEL (Vertical Cavity Surface Emitting Laser) array in an optical package. The ASIC is designed using only core transistors in a 65 nm CMOS process to enhance the radiation-hardness. The ASIC contains an 8-bit DAC to control the bias and modulation currents of the individual channels in the VCSEL array. The DAC settings are stored in SEU (single event upset) tolerant registers. Several optical transceivers were irradiated with 24 GeV/c protons up to a dosage of 74 Mrad to study the radiation hardness of the high-speed optical links. The irradiated devices have been extensively characterized. The performance of the devices is satisfactory after the irradiation. We will present a comparison of the performance of the devices before and after the irradiation.
        Speaker: K.K. Gan (T)
        Slides
      • 6:00 PM
        Discussion time 18m
    • 4:30 PM 6:18 PM
      R4-Photon detectors(3) Room 307

      Room 307

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Prof. Gerald Eigen (University of Bergen) , Valerio Vagelli (INFN-PG)
      • 4:30 PM
        The TORCH PMT, a close packing, long life MCP-PMT for Cherenkov applications with a novel high granularity multi-anode 18m
        Photek are in a development program with CERN and the Universities of Oxford and Bristol to produce a novel square PMT for the proposed TORCH detector which is being developed within an ERC project, with potential application in a future upgrade of the LHCb experiment around 2023. The PMT development takes the known performance of Photek microchannel plate (MCP) based detectors of a potential spatial resolution of < 0.1 mm and potential time resolution of < 40 ps rms and aims for a balance of these performance objectives (that often work in opposition) to meet the technical PMT requirements of the proposed TORCH upgrade at LHCb. To achieve high resolution in both time and position and maintain a good level of parallelism in photon detection, a multi-anode approach has to be used. From a detector manufacturing perspective there are three main challenges in this PMT development: long lifetime, multi-anode output and close packing (requiring a square tube envelope). 1. Long Lifetime Previous work published by Photek and several other parties have now established the method of atomic layer deposition (ALD) coating of the MCP as being the most effective method of demonstrated a significant lifetime improvement in an MCP-PMT. We will present further evidence of a PMT capable of producing over 5 C / cm2 of anode charge without any detectable reduction in photocathode sensitivity. 2. Multi-Anode Output The technical requirements of the TORCH PMT include an effective spatial resolution of 128 × 8 pixels within a 53 mm x 53 mm working area. Such high granularity in one direction presents a difficult challenge in terms of manufacturing the segmented anode and also in keeping inter-anode cross talk to a minimum. We will present a novel anode design that combines the image charge technique with a patterned anode, and uses a charge sharing algorithm that produces an inter-pad position resolution beyond the granularity of the pads themselves, 0.225 mm FWHM (sigma ~ 0.1 mm) derived from pads on a 0.83 mm pitch: The anode signal is A.C. coupled and the structure is high voltage tolerant, so the input window can be fixed at ground potential which removes any issues with charging effects. We will describe the methods of coupling the detector to multiple NINO chips, a 32-channel time-over-threshold ASIC using ACF (anisotropic conductive film) that minimises any parasitic input capacitance by allowing very close proximity between the NINO and the detector. We will build on previous results of software simulations that combine the pulse height variation from the detector and NINO threshold levels to predict a position resolution to show initial results using the NINO ASIC and the first multi-anode tube prototypes. 3. Close Packing (requiring a square tube envelope) The technical challenge for Photek is to produce a square tube envelope that has a fill factor of > 88 % working width over the total detector size (including housing) in one direction. We will present results from the first square PMT prototypes demonstrating the fill factor ratio. We will present results from the first square PMT prototypes demonstrating the required fill factor ratio.
        Speaker: James Milnes (P)
        Slides
      • 4:48 PM
        Recent Advances in LAPPD™ and Large Area Micro-channel Plates 18m
        Recent performance results are presented for Large Area Picosecond Photodetectors (LAPPD™s) that are being developed by Incom, Inc. The LAPPD is a micro-channel plate (MCP) based photodetector containing a bi-alkali photocathode with overall dimensions of 230 mm x 220 mm x 21 mm, an active area of up to 400 cm2, spatial resolution ~1 mm, and timing resolution of approximately 100 picoseconds for single photoelectrons and better for multiple photoelectrons. Performance will be discussed for LAPPDs that have been fabricated with gains ~1x106 and quantum efficiency >20%. The low MCP contribution to background rates will also be discussed. LAPPDs are being developed for precision time-of-flight and particle identification measurements in accelerator-based experiments and large water Cherenkov and scintillation detectors. The key component of the LAPPD is the large area MCP manufactured by Incom. A “hollow-core” process is used to draw and fuse millions of micro-capillaries into blocks that are sliced and polished into glass capillary array (GCA) plates. The glass contains low levels of radioactive isotopes resulting in lower dark noise. The GCAs are then converted into MCPs using an atomic layer deposition (ALD) process. ALD-coating has been shown to extend the life of MCP photomultipliers (Conneelly et al. 2013; Lehmann et al., 2014; Matsuoka et al., 2017). Because the glass fabrication and coating operations are separate they can be independently optimized to produce high performing, large area MCPs at low cost per area. The large format also enables dicing into smaller MCPs of desired shapes with matched resistance. Recent performance results will also be discussed for pairs of 203 mm x 203 mm MCPs with gains >1x107 and uniformity >80% across the full area.
        Speaker: Mr Christopher Craven (Incom, Inc.)
        Slides
      • 5:06 PM
        Hamamatsu PMTs Latest developmental status 18m
        Speaker: haiyi jin (Hamamatsu Photonics K.K.)
        Slides
      • 5:24 PM
        Discussion time 54m
    • 9:00 AM 10:30 AM
      Plenary 3 305

      305

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Convener: Junji Haba (K)
      • 9:00 AM
        Photon detection 30m
        Photon detection has been a cornerstone in particle physics, enabling many fundamental physics discoveries. Traditional photo-detectors are based on a mature, time-honored technology that has seen incremental improvements over time. Recent years, however, have seen a rapid increase in new developments, either bringing new techniques to bear on traditional methods or implementing transformational improvements in existing technologies. The continuing trend in adopting new techniques and methodologies to the development of photodetectors holds significant promise, possibly providing for a transformation in how photodetectors will be viewed and produced. This would have a huge impact on science and society. Some examples will be discussed.
        Speaker: Prof. Marcel Demarteau (Argonne National Laboratory)
        Slides
      • 9:30 AM
        Neutrino physics and detectors 30m
        Recent development of detectors for neutrino intrinsic property measurements and neutrino oscillations are reviewed, including low background detectors for searching for the neutrino-less double beta decay, water Cherenkov, liquid Argon TPC, liquid scintillator for neutrino oscillations. Such technologies had significant progresses in the past a few years and further steps are planned for the future.
        Speaker: Dr Liangjian Wen (高能所)
        Slides
      • 10:00 AM
        Gravitational wave detection 30m
        For the detection of gravitational wave, KAGRA, Japanese 3km cryogenic gravitational wave telescope, project started from 2010. KAGRA has two unique feature to achieve the detection and long term stable observation : KAGRA is being constructed in an underground mine. The test mass is cooled down to cryogenic temperature of ~20 Kelvin. In this talk, we will present current status of the KAGRA experiment.
        Speaker: Prof. Kazuhiro Hayama (U.Tokyo)
        Slides
    • 10:30 AM 11:00 AM
      Tea Break 30m
    • 11:00 AM 12:30 PM
      Plenary 4 305

      305

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Convener: Dr Marcel Demarteau (Fermilab)
      • 11:00 AM
        Low radiation techniques 30m
        Speaker: Prof. Grzegorz Zuzel (Institute of Physics, Jagiellonian University)
        Slides
      • 11:30 AM
        Performance studies and requirements on the calorimeters for a FCC-hh experiment 30m
        The physics reach and feasibility of the Future Circular Collider (FCC) with center of mass energies up to 100 TeV and unprecedented luminosity is currently under investigation. The new energy regime opens the opportunity for the discovery of physics beyond the standard model. However, the discovery of e.g. postulated new heavy particles such as gauge bosons require an efficient reconstruction of very high $p_{T}$ jets. The reconstruction of these boosted objects, with a large fraction of highly energetic hadrons, set the requirements on the calorimetry: excellent energy resolution (especially low constant term), containment of highly energetic hadron showers, and high transversal granularity to provide sufficient distinction of close by particles. Additionally the FCC detectors have to meet the challenge of a very high pile-up environment. We will present the preliminary results of the ongoing performance studies, discuss the feasibility and potential of the technologies under test, while addressing the needs of the physics benchmarks of the FCC-hh experiment.
        Speaker: Coralie Neubüser (CERN)
        Slides
      • 12:00 PM
        Front-end electronics for next generation of imaging/timing calorimeters 30m
        The next generation of calorimeters on colliders will provide unprecedented measurements of particle showers in 5 dimensions (space, energy and time). The very fine granularity leads to millions of readout channels and sets high constraints on the readout electronics, which is embedded inside the detector. In addition to the usual low noise/high dynamic range/high accuracy requirements of calorimetry come requirements of very low power and high data rate output. More recently, high timing accuracy (~20-50 ps) is studied to mitigate the harsh pileup environement. The talk will present front-end architectures and recent results form CALICE, ATLAS and CMS collaborations.
        Speaker: Dr Christophe de La TAILLE (OMEGA Ecole Plytechnique-CNRS/IN2P3)
        Slides
    • 12:30 PM 2:00 PM
      LUNCH 1h 30m Banquet Hall on the second floor (Beijing North Star Continental Grand Hotel)

      Banquet Hall on the second floor

      Beijing North Star Continental Grand Hotel

    • 2:00 PM 3:30 PM
      Parallel Room305E

      Room305E

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
    • 2:00 PM 3:30 PM
      R1-Astrophysics and space instrumentation(2) Room 305A

      Room 305A

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Miroslav Gabriel (Max Planck Institute for Physics) , Prof. Yinong LIU (Tsinghua University)
      • 2:00 PM
        A Novel Gamma-ray Detector for Gravitational Wave Electromagnetic Counterpart Searches in Space 18m
        Gravitational wave burst high energy Electromagnetic Counterpart All-sky Monitor experiment (GECAM) is proposed by Institute of High Energy Physics (IHEP), which is characterized of all-sky 4π γ-rays monitor with two micro-satellite in space. A novel LaBr3 gamma-ray detector readout with large area Silicon Photomultiplier (SiPM) array has been developed for this special application, characterized by only one readout channel, compact, low power, X-ray sensitive to about 5 keV. This presentation will report the detector design and performance.
        Speaker: Ms Pin Lv (IHEP)
        Slides
      • 2:18 PM
        Spin-Off Application of Silica Aerogel in Space: Capturing Intact Cosmic Dust in Low-Earth Orbits and Beyond 18m
        Since the 1970s, silica aerogel has been widely used as Cherenkov radiators in accelerator-based particle- and nuclear-physics experiments, as well as cosmic ray experiments. For this major application, the adjustable refractive index and optical transparency of the aerogel are highly important. We have been in the process of developing high-quality aerogel tiles for use in a super-B factory experiment (Belle II) to be performed at the High Energy Accelerator Research Organization (KEK), Japan, and for various particle- and nuclear-physics experiments performed (or to be performed) at the Japan Proton Accelerator Complex (J-PARC) since the year 2004. Our recent production technology has enabled us to obtain a hydrophobic aerogel with a wide range of refractive indices (1.0026–1.26) and with an approximately doubled transmission length (i.e., a 400-nm wavelength) in various refractive index regions. Silica aerogel is also useful as a cosmic dust capture medium. Low-density aerogels can capture almost-intact micron-size dust grains with hypervelocities on the order of several kilometers per second in space, which was first recognized in the 1980s. For this interesting application, the high porosity (i.e., low bulk density below 0.1 g/cm$^3$; refractive index $n$ < 1.026) and optical transparency of the aerogel are vitally important. The latter characteristic enables one to easily find a cavity under an optical microscope, which is produced in an aerogel by the hypervelocity impact of a dust particle. Aerogel-based cosmic dust collectors were used in several missions aboard spacecraft such as the Space Shuttles and the International Space Station (ISS) in low-Earth orbits. The Stardust spacecraft, which was a deep-space mission by the U.S. National Aeronautics and Space Administration (NASA), retrieved comet and interstellar dust back to Earth successfully in 2006. In support of present-day endeavors, we have developed a next-generation ultralow-density (0.01 g/cm$^3$; $n$ = 1.003) aerogel for the Tanpopo mission, which is an astrobiological experiment in operation now aboard the ISS. In this paper, a spin-off application of aerogel as a dust-capture medium in space is described. We provide an overview of the physics behind hypervelocity capture of dust via aerogels and chronicle their history of use as a dust collector. In addition, recent developments regarding the high-performance aerogel used in the Tanpopo mission are discussed.
        Speaker: Makoto Tabata (Chiba University)
        Slides
      • 2:36 PM
        Research and development on a Scintillating Fiber Tracker with SiPM array readout for Application in Space 18m
        Scintillating fibers can be complementary to silicon micro-strips detectors for particle trackers in Space or offer an interesting alternative. Less fragile, more flexible, with no need of wire bonds, they can be used for the development of high-resolution charged-particle tracking detectors. Prototypes consisted in a ribbon of 40 cm long, 250 $\mu$m diameter fibers, with Hamamatsu MPPC arrays and readout by VATA ASICs have been tested. Proton beam test results, status of the space qualification process, as well as the preliminary tests with the new IDEAS SIPHRA chip will be presented.
        Speaker: Chiara Perrina (University of Geneva)
        Slides
      • 2:54 PM
        MoBiKID - Kinetic Inductance Detectors for upcoming B-mode satellite missions 18m
        Our comprehension of the dawn of universe grew incredibly during last years, pointing to the existence of the cosmic inflation. The primordial B-mode polarization of the Cosmic Microwave Background (CMB) represents a unique probe to confirm this hypothesis. The detection of such small perturbations of the CMB is a challenge that will be faced in the near future by a new dedicated satellite mission. MoBiKID is a new project, funded by INFN, to develop an array of Kinetic Inductance Detectors able to match the requirements of a next-generation experiment. The detectors will feature a Noise Equivalent Power better than 5 aW/Hz^0.5 and will be designed to minimize the background induced by cosmic rays, which could be the main limit to the sensitivity. I will present the current status of detectors development and the next planned steps to reach the goal of this project.
        Speaker: Angelo Cruciani (INFN - Sezione di Roma)
        Slides
      • 3:12 PM
        Discussion time 18m
    • 2:00 PM 3:30 PM
      R2-Gaseous detectors(2) Room 305C

      Room 305C

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Antonio Amoroso (University of Turin and INFN) , Bo Yu (Brookhaven National Lab)
      • 2:00 PM
        Resistive Micromegas for the Muon Spectrometer Upgrade of the ATLAS Experiment 18m
        Large size multilayer resistive Micromegas detectors will be employed for the Muon Spectrometer upgrade of the ATLAS experiment at CERN. The current innermost stations of the muon endcap system, the 10 m diameter Small Wheel, will be upgraded in the 2019-2020 long shutdown of LHC, to retain the good precision tracking and trigger capabilities in the high background environment expected with the upcoming luminosity increase of the LHC. Along with the small-strip Thin Gap Chambers (sTGC) the “New Small Wheel” will be equipped with eight layers of Micromegas (MM) detectors arranged in multilayers of two quadruplets, for a total of about 1200 m2 detection planes. All quadruplets have trapezoidal shapes with surface areas between 2 and 3 m2. The Micromegas system will provide both trigger and tracking capabilities. In order to achieve a 15% transverse momentum resolution for 1 TeV muons, a challenging mechanical precision is required in the construction for each plane of the assembled modules, with an alignment of the readout elements (strips with ~450 um pitch) at the level of 30 μm along the precision coordinate and 80 μm perpendicular to the plane. Each Micromegas plane must achieve a spatial resolution better than 100 μm independent of the track incidence angle and operate in an inhomogeneous magnetic field (B < 0.3 T), with a rate capability up to ~15 kHz/cm2. In May 2017, all four types full size prototypes (modules-0) will be completed and will be subjected to a thorough validation phase. The Modules-0 construction procedures will be reviewed along with the results of the quality controls results during constructions and the final validation tests obtained with X-rays, cosmic tracks and with high-energy particle beams at CERN.
        Speaker: Andreas Dudder (Johannes-Gutenberg-Universitaet Mainz)
        Slides
      • 2:18 PM
        Small-pads Resistive Micromegas for Operation at Very High Rates 18m
        The resistive Micromegas detectors have already proved to be suitable for precision tracking in dense particle rate environment up to few kHz/cm$^2$. In order to achieve even higher rate capability, with low occupancy up to few MHz/cm$^2$, fine-segmented strips could be replaced by few mm$^2$ pads. We present here a solution based on small anode pads, overlayed by an insulating layer with a pattern of resistive pads on top. The readout and resistive pads are connected by intermediate resistors embedded in the insulating layer. A first prototype has been constructed at CERN, composed of a matrix 48x16 of read-out pads with rectangular shape 0.8mm x 2.8mm (pitch of 1 and 3 mm in the two coordinates), for a total of 768 channels read-out by 6 APV-25 chips. Characterization and performance studies of the detector have been carried out by means of radioactive sources, X-Rays, cosmic rays and test beam data. The results will be presented.
        Speaker: Alviggi Mariagrazia (Universita e INFN, Napoli)
        Slides
      • 2:36 PM
        Readout and Precision Calibration of square meter sized Micromegas Detectors using the Munich Cosmic Ray Facility 18m
        Currently m$^2$ large Micromegas detectors with a spatial resolution better than 100 $\mu$m are of big interest for many experiments and applications. The combination of large size and excellent spatial resolution requires highly sophisticated construction methods in order to fulfil tight mechanical tolerances. We present a method to survey full sized micromegas detectors on potential detector deformations or deviations of the internal micro pattern structure from design values by comparing to precision reference tracking of cosmic muons. The LMU Cosmic Ray Facility consists of two 8 m$^2$ ATLAS MDT (monitored drift tube) chambers for precision muon reference tracking, as well as two segmented trigger hodoscopes for 10 cm position information along the wires of the MDTs with sub-ns time resolution. The angular acceptance for cosmic muons is $\pm$ 30 degrees and its mechanical layout allows the installation of one or multiple Micromegas detectors in between the MDT reference chambers. Track segments reconstructed in all systems can be compared, allowing a full scan for efficiency homogenity, pulse height, single plane angular resolution and spatial resolution, also as function of multiple scattering. In addition to results on the performance of resistive strip Micromegas detectors of size up to 2 m$^2$ we report on the synchronized electronic readout system, based on standerd MDT electronics, together with custom electronics and firmware, based on the SRS Scalable Readout System.
        Speaker: Andre Zibell (U)
        Slides
      • 2:54 PM
        Particle tracking in the Negative Ion Gas SF6 with a Micromegas 18m
        Recent work demonstrated gas gain in the negative ion gas SF$_6$ using GEMs and Thick GEMs. SF$_6$ is a favorable gas for directional dark matter detection with a TPC because it provides low diffusion (at the thermal limit), strong sensitivity to spin-dependent WIMP dark matter (through the high fluorine content), and full-volume fiducialization (thanks to multiple negative ion species). In this work, we present results from a prototype detector showing successful operation of a Micromegas with strip readout in SF$_6$ gas, and discuss the prospects for directional dark matter detectors using this readout technology.
        Speaker: Prof. James Battat (Wellesley College)
      • 3:12 PM
        A new method for Micromegas fabrication 18m
        We have developed a new method for fabricating Micromegas detectors based on thermal bonding technique. A high gain (>10000) and a good energy resolution of 16% (FWHM,  5.9 KeV x-rays) can be obtained for Micromegas detectors built with this method. In order to reduce sparking rate of the detectors, we have also studied resistive anodes by Germanium plating and carbon paste screen printing techniques. Combining the thermal bonding technique with the resistive electrode technique, we have built a 2D position-sensitive Micromegas detector with four-corner readout and a back-to-back double avalanche structure with good performance. This demonstrates the wide range of applications of the new method. This report will describe the new Micromegas fabrication method in various aspects, including its advantages over conventional Micromegas fabrication methods. Results from the prototyping for the development of the new method will also be presented.
        Speaker: Dr Jianbei Liu (University of Science and Technology of China)
        Slides
    • 2:00 PM 3:30 PM
      R4-Photon detectors(4) Room 307

      Room 307

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Hugo Delannoy (Interuniversity Institute for High Energies (ULB-VUB)) , jennifer thomas (高能所)
      • 2:00 PM
        Development of a SiPM camera demonstrator for the Cherenkov Telescope Array observatory telescopes 18m
        The Cherenkov Telescope Array (CTA) Consortium is developing the new generation of ground observatories for the detection of very-high energy gamma-rays. The Italian Institute of Nuclear Physics (INFN) is contributing to the R&D of a possible solution for the Cherenkov photon cameras based on Silicon Photomultiplier (SiPM) detectors sensitive to near ultraviolet energies, produced by Fondazione Bruno Kessler (FBK). The concept, mechanics and readout electronics for SiPM modules which could equip a possible upgrade for the focal plane camera of the pSCT telescope, prototype of a CTA medium size telescope with Schwarzschild-Couder optics, are currently being developed. This contribution reviews the development, the assembly and the performances of 4x4 SiPM modules intended to equip the pSCT camera upgrade.
        Speaker: Valerio Vagelli (INFN Perugia, Università degli Studi di Perugia)
        Slides
      • 2:18 PM
        Study on Recovery Time of Silicon Photomultiplier with Epitaxial Quenching Resistors 18m
        Silicon photomultiplier (SiPM), which consists of multiple pixels of avalanche photodiodes working in Geiger-mode (G-APD) is a promising semiconductor device in low level light detection for its excellent performances such as high response speed, low operated voltage, insensitive to magnetic field and small volume. The SiPM with epitaxial quenching resistors (EQR SiPM) using epitaxial silicon layer below p-n junction as the quenching resistor has been developed by the Novel Device Lab (NDL) at Beijing Normal University. EQR SiPM resolves a conflict between wide dynamic range and large photon detection efficiency (PDE), which exists in most commercial SiPMs for their poly-silicon quenching resistors on the surface. In some high energy physics and medical imaging, strict demands are put forward on the recovery time of SiPM that means device must be restored in short time after detecting a photon and prepare for the next photon as soon as possible, e.g. Compact Muon Solenoid (CMS) detector in Large Hadron Collider (LHC) and computerized tomographic scanning (CT). When upgrading the LHC for higher luminosities, the bunch spacing intervals is planned to be decreased to 12 ns, thus the dead time of detection is required shorter than the interval time. When detecting at the CT system, SiPM with shorten recovery time is welcome for scan time could be reduced. The time needed to recharge a pixel after a breakdown has been quenched due to the finite time taken to quench the avalanche then reset the diode voltage to its initial bias value is defined as recovery time (or dead time). It is important to measure the recovery time for studying the internal mechanism of SiPM and to design detectors. In this manuscript, the EQR SiPM produced by NDL has P on N structure and pixel size of 10μm. The recovery time is mainly investigated with double light pulse method, which employ two consecutive laser pulses with a defined relative time differences varying from several nanoseconds to hundreds of nanoseconds, and record the charge number change with the corresponding time, then fit out recovery curve to determine the recovery time. By illuminating whole sensor, the overall recovery time of all pixels was measured; by partially illuminating the detector using a bare optical fiber with diameter of tens of micrometer, the partial recovery time of fired pixels was obtained. The devices were all tested on optimized over-bias voltage and at room temperature. The results show that the recovery time of device has a great dependence on the active area of device and the number of fired pixels. The larger active area or the more fired pixels, the longer recovery time. For the EQR SiPM with active area of 1.4mm2, the overall recovery time was characterized as 15ns. For the EQR SiPM with active area of 3mm2, the overall recovery time was 30ns, and the partial recovery time was 6ns while the number of fired pixels were controlled about 2000. Though the SiPM has small pixel size and small RC time constant, the pixels can’t possibly be fired synchronously when they are bias on, that lead to pulse-spreading thus broaden recovery time. In addition, the adding capacitance of pixels, the relative circuit and the distance of fired pixel to extraction electrode all affect characterization of the recovery time.
        Speaker: Ms Jiali Jiang (Novel Device Laboratory,Beijing Normal University)
        Slides
      • 2:36 PM
        Gain stabilization and afterpulsing studies of SiPMs 18m
        The gain of SiPMs increases with bias voltage and decreases with temperature. To operate SiPMs at stable gain, the bias voltage can be adjusted to compensate temperature changes. We have tested this concept with 30 SiPMs from three manufacturers (Hamamatsu, KETEK, CPTA) in a climate chamber at CERN varying the temperature from 1°C to 50°C. We built an adaptive power supply that used a linear temperature dependence of the bias voltage readjustment. With one selected bias voltage readjustment, we stabilized four SiPMs simultaneously. We fulfilled our goal of limiting the deviation from gain stability in the 20°C-30°C temperature range to less than ±0.5% for most of the tested SiPMs. We further studied afterpulsing for sensors with trenches.
        Speaker: Dr Eigen Gerald (University of Bergen)
        Slides
      • 2:54 PM
        New Study for SiPMs Performance in High Electric Field Environment 18m
        In the search for the nature of the neutrino, neutrinoless double beta decay (0νββ) plays a significant role in understanding its properties. By measuring the 0νββ decay rate with the desired sensitivity, it is hoped to verify the nature of the neutrino (Majorana or Dirac particle), lepton number violation and help determine the values for the absolute neutrino masses. The Enriched Xenon Observatory (EXO), with its two phases; the current EXO-200 and the future multi-tonne upgrade nEXO, is aiming at search for the 0νββ decay of 136Xe. A key parameter that defines the detection sensitivity/capability of the detector is its energy resolution. nEXO aims to reach < 1% energy resolution at the Q-value of the decay. Efficient detection of LXe scintillation photons is critical to achieve this desired value. The current nEXO concept has an array of silicon photomultipliers (SiPMs) located behind the field shaping rings for this purpose. Although, during the past decade, substantial development in the area of SiPMs has offered what appears to be a superior alternative to conventional methods for our detector, SiPMs are still counted as relatively new technology. Hence, not all their features have been examined under the influence of extreme working environments. Although, it is known that the SiPMs are stable against the change in the magnetic field, but little is known about their behavior in high electric field variations. In the current design of the nEXO field cage, the SiPMs will be exposed to different electric field values along the drift axis. In this work we perform new study on the SiPMs performance under the influence of the exposure to high electric field value.
        Speaker: Dr Tamer Tolba (Institute of High Energy Physics - Chinese Academy of Science)
        notes
        Paper
        Slides
      • 3:12 PM
        3Dimensionally integrated Digital SiPM 18m
        Analog silicon photo-multipliers (SiPMs) are now a mature technology in particle physics being widely used for the detection of scintillation and Cerenkov light. Digital SiPMs remain an emerging technology driven in part by the goal of achieving 10ps coincidence timing resolution for Positron Emission Tomography, which translates roughly to requiring photo-detectors with 10ps single photon timing resolution (SPTR). Our group is developing a photo-detector solution based on 3 dimensional integration capable of achieving 10ps SPTR with high efficiency, while remaining cost effective. Our 3-Dimensionally integrated digital SiPM (3DdSiPM) solution is expected to be ideally suited for many particle physics experiments requiring timing resolution better than 100ps. Our solution is also fully digital (photon coming in, bits coming out) hence eliminating the need for front end electronics. The power dissipation of 3DdSiPMs is expected to be significantly lower than analog SiPM front end electronics for the same performance, which is a very attractive feature for the detection of scintillation light in liquid Xenon and liquid Argon, where liquid boil-off is a serious concern. Our group is pursuing in particular a solution for the nEXO experiment requiring the detection of 175nm light over 5 m$^2$. We will describe the technology in details showing prototype performances and discussing applications in particle and astro-particle physics.
        Speaker: Fabrice Retiere (TRIUMF)
        Slides
    • 3:30 PM 4:30 PM
      POSTER + Tea Break 1h Corridor on the third floor

      Corridor on the third floor

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
    • 4:30 PM 6:00 PM
      Parallel Room305E

      Room305E

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
    • 4:30 PM 6:00 PM
      R1-Calorimeters(4) Room 305A

      Room 305A

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Burak Bilki (U) , Prof. Nural Akchurin (Texas Tech University)
      • 4:30 PM
        Development of ATLAS Liquid Argon Calorimeter Readout Electronics for the HL-LHC 18m
        The LHC high-luminosity upgrade in 2024-2026 requires the associated detectors to operate at luminosities about 5-7 times larger than assumed in their original design. The pile-up is expected to increase to up to 200 events per proton bunch-crossing. To be able to retain interesting physics events even at rather low transverse energy scales, increased trigger rates are foreseen for the ATLAS detector. At the hardware selection stage acceptance rates of 1 MHz are planned, combined with longer latencies up to 60 micro-seconds in order to read out the necessary data from all detector channels. Under these conditions, the current readout of the ATLAS Liquid Argon (LAr) Calorimeters does not provide sufficient buffering and bandwidth capabilities. Furthermore, the expected total radiation doses are beyond the qualification range of the current front-end electronics. For these reasons a replacement of the LAr front-end and back-end readout system is foreseen for all 182,500 readout channels, with the exception of the cold pre-amplifier and summing devices of the hadronic LAr Calorimeter. The new low-power electronics must be able to capture the triangular detector pulses of about 400-600 nano-seconds length with signal currents up to 10 mA and a dynamic range of 16 bit. Different technologies to meet these requirements are under evaluation: A preamplifier in 130nm CMOS technology with two gain stages can cover the desired dynamic range while meeting the required noise levels and non-linearity values. Alternatively, developments of pre-amplifier, shaper as well as ADCs are performed in 65 nm CMOS technology. Due to the lower voltage range, 2-gain and 4-gain designs of the analog part are studied with programmable peaking time to optimize the noise level in presence of signal pile-up. Radiation-hard, 14 bit ADC operating at 40 or 80 MHz are also being studied. Results from performance-simulation of the calorimeter readout system for the different options and results from design studies and first tests of the components will be presented.
        Speaker: Hils Maximilian (Technische Universitaet Dresden)
        Slides
      • 4:48 PM
        Upgrade of the ATLAS Tile Calorimeter for the High luminosity LHC 18m
        The Tile Calorimeter (TileCal) is the hadronic calorimeter of ATLAS covering the central region of the ATLAS experiment. TileCal will undergo a major replacement of its on- and off-detector electronics in 2024 for the high luminosity programme of the LHC. The calorimeter signals will be digitized and sent directly to the off-detector electronics, where the signals are reconstructed and shipped to the first level of trigger at a rate of 40 MHz. This will provide a better precision of the calorimeter signals used by the trigger system and will allow the development of more complex trigger algorithms. Three different options are presently being investigated for the front-end electronic upgrade. Extensive test beam studies are being employed to determine which option will be selected. The off-detector electronic is based on the Advanced Telecommunications Computing Architecture (ATCA) standard and is equipped with high performance optical connectors. The system is designed to operate in a high radiation environment and presents a high level of redundancy. Field Programmable Gate Arrays (FPGAs) are extensively used for the logic functions of the off- and on-detector electronics. One hybrid demonstrator prototype module with the new calorimeter module electronics, but still compatible with the present system, is planned to be inserted in ATLAS in one of the next winter shutdown. This contribution presents the components of the Tile Calorimeter upgrade for the high luminosity LHC, the production and performance of the prototype of the read-out electronics, the results of the test-beam tests at CERN and the plans for the next years.
        Speaker: Fukun Tang
        Slides
      • 5:06 PM
        Energy Resolution and Timing Performance Studies of a W-CeF3 Sampling Calorimeter prototype with a Wavelength-Shifting Fiber Readout 18m
        An electromagnetic sampling calorimeter prototype has been developed to satisfy the requirements for running at the CERN Large Hadron Collider after the planned High-Luminosity upgrade (HL-LHC). An innovative design, with wavelength-shifting (WLS) fibers running along the chamfers of each calorimeter cell, minimizes the mechanical complexity. The resistance to radiation has been optimised by minimizing the light path, by adopting Cerium Fluoride crystals as active medium and by aiming at Cerium-doped quartz for the WLS fibers, as its luminescence excitation wavelength matches well the CeF3 emission. At the Beam Test Facility in Frascati, Italy, electrons with an energy of up to 491 MeV have allowed us to obtain first performance results on a prototype channel of 24 mm x 24 mm transversal cross section, using Kuraray WLS fibers. At the SPS-H4 beam line at CERN, electrons with energies of up to 150 GeV have then been used for an in-depth study of the energy resolution and of the impact-point dependence of response, and agreement is found with detailed GEANT4 simulations. A further beam test, where Cerium-doped quartz fibers have been adopted for wavelength-shifting, gives an energy resolution matching expectations. First tests of the timing performance, an aspect which is crucial for pileup mitigation at the HL-LHC, yield a resolution better than 100 ps using SiPMs, when the fast Cherenkov component from the fibers is exploited. A matrix of 5 x 3 channels has been built and has been exposed to high-energy electrons from the CERN SPS to study the impact angle dependence of energy resolution and response up to ~15 deg. Its granularity and sampling fraction have been optimised for optimum pileup rejection. Transverse dimensions of 17 mm x 17 mm, 12 samplings of 6 mm Tungsten and 6 mm CeF3 for a total of 25 radiation lengths, and a readout using Avalanche Photodiodes have been adopted.
        Speaker: Dr Francesca Nessi-Tedaldi (ETH Zurich, Switzerland)
        Slides
      • 5:24 PM
        A High-Granularity Timing Detector for the Phase-II upgrade of the ATLAS Calorimeter system 18m
        The expected increase of the particle flux at the high luminosity phase of the LHC (HL-LHC) with instantaneous luminosities up to L ≃ 7.5 $\times 10^{34} cm^{−2} s^{−1}$ will have a severe impact on pile-up. The pile-up is expected to increase on average to 200 interactions per bunch crossing. The reconstruction and trigger performance for electrons, photons as well as jets and transverse missing energy will be severely degraded in the end-cap and forward region, where the liquid Argon based electromagnetic calorimeter has coarser granularity compared to the central region. A High Granularity Timing Detector (HGTD) is proposed in front of the liquid Argon end-cap calorimeters for pile-up mitigation at Level-0 (L0) trigger level and in the offline reconstruction. This device should cover the pseudo-rapidity range of 2.4 to about 4.2. Four layers of Silicon sensors, possibly interleaved with Tungsten, are foreseen to provide precision timing information for charged and neutral particles with a time resolution of the order of 30 pico-seconds per readout cell in order to assign the energy deposits in the calorimeter to different proton-proton collision vertices. Each readout cell has a transverse size of only a few mm, leading to a highly granular detector with several hundred thousand readout cells. Using the information provided by the detector, the contribution from pile-up jets can be reduced significantly while preserving high efficiency for hard-scatter jets. The expected improvements in performance are in particular relevant for physics processes with forward jets, like vector-boson fusion and vector-boson scattering processes, and for physics signatures with large missing transverse energy. Silicon sensor technologies under investigation are Low Gain Avalanche Detectors (LGAD), pin diodes, and HV-CMOS sensors. In this presentation, starting from the physics motivations and expected performance of the High Granular Timing Detector at the HL-LHC, then the proposed detector layout and Front End readout, laboratory and beam test characterization of sensors and the results of radiation tests will be discussed.
        Speaker: Lenzi Bruno (CERN)
        Slides
      • 5:42 PM
        Precision Timing Calorimetry with the upgraded CMS Crystal ECAL 18m
        Particle detectors with a timing resolution of order 10 ps can improve event reconstruction at high luminosity hadron colliders tremendously. The upgrade of the Compact Muon Solenoid (CMS) crystal electromagnetic calorimeter (ECAL), which will operate at the High Luminosity Large Hadron Collider (HL-LHC), will achieve a timing resolution of around 30 ps for high energy photons and electrons. In this talk we will discuss the benefits of precision timing for the ECAL event reconstruction at HL-LHC. Simulation and test beam studies carried out for the timing upgrade of the CMS ECAL will be presented and the prospects for a full implementation of this option will be discussed.
        Speaker: Adi Bornheim (On behalf of the CMS Collaboration)
        Slides
    • 4:30 PM 6:00 PM
      R2-Experimental detector systems(4) Room 305C

      Room 305C

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Igal Jaegle (University of Florida) , Prof. Jin Li (IHEP/THU)
      • 4:30 PM
        A vertex and tracking detector system for CLIC 18m
        The physics aims at the proposed future CLIC high-energy linear e+e- collider pose challenging demands on the performance of the detector system. In particular the vertex and tracking detectors have to combine precision measurements with robustness against the expected high rates of beam-induced backgrounds. The requirements include ultra-low mass, facilitated by power pulsing and air cooling in the vertex-detector region, small cell sizes and precision hit timing at the few-ns level. A detector concept meeting these requirements has been developed and an integrated R&D program addressing the challenges is progressing in the areas of ultra-thin sensors and readout ASICs, interconnect technology, mechanical integration and cooling. We present the proposed vertex and tracking detector system, its performance obtained from full-detector simulations, and give an overview of the ongoing technology R&D, including results from recent beam tests of prototypes.
        Speaker: Nurnberg Andreas (CERN, Geneva, Switzerland)
        Slides
      • 4:48 PM
        Radiative Decay Counter for active background identification in MEG II experiment 18m
        The MEG experiment searched for the lepton flavor violating process, $\mu^{+} \rightarrow e^{+}\gamma$, and published result gave a new upper limit on the branching ratio of $\mathscr{B} < 4.2 \times 10^{-13}$. The upgraded experiment (MEG II) will start to achieve one order higher branching ratio sensitivity $O(10^{-14})$ by using the world's most intense muon beam up to $\sim10^{8} \mu^{+}/$s and upgraded detectors with considerably improved performance. One of the key for the upgrade is to suppress the background rate which is significantly increased with the higher muon beam rate. We will newly introduce the Radiative Decay Counter (RDC) to identify the background photon from the radiative muon decay (RMD). The RDC detects the low momentum positron associated with RMD on the beam axis at downstream of the muon stopping target. We developed the detector which consists of fast plastic scintillators and LYSO crystals with SiPM readout. By testing the detector with the muon beam, the capability of the background identification was successfully demonstrated. Further improvement of the sensitivity is possible by detecting the positrons from RMD at upstream of the target. We designed the detector based on a thin layer of plastic scintillating fibers to minimize the influence on the muon beam. A series of feasibility studies were performed towards the installation. We concluded that the influence on the muon beam transportation is expected to be small. Moreover, by considering the pileup beam muons and the light yield of the scintillating fibers, the detection efficiency for the positrons was evaluated. By installing both RDC detectors, the improvement of the sensitivity is expected to be 22-28$\%$.
        Speaker: Ryoto Iwai (ICEPP, The University of Tokyo)
        Slides
      • 5:06 PM
        Belle II iTOP optics: design, construction, and performance 18m
        The imaging-Time-of-Propogation (iTOP) counter is a new type of ring-imaging Cherenkov counter developed for particle identification at the Belle II experiment. It consists of 16 modules arranged azimuthally around the beam line. Each module consists of one mirror, one prism and two quartz bar radiators. Here we describe the design, acceptance test, alignment, gluing and assembly of the optical components. All iTOP modules have been successfully assembled and installed in the Belle II detector by the middle of 2016. After installation, laser and cosmic ray data have been taken to test the performance of the modules. First results from these tests will be presented.
        Speaker: Dr Boqun Wang (University of Cincinnati)
        Slides
      • 5:24 PM
        Spherical Measuring Device of Secondary Electron Emission Coefficient Based on Pulsed Electron Beam 18m
        In order to improve the performance of the microchannel plate, a material having a high secondary electron emission coefficient (SEEC) is required, and the SEEC of this material needs to be accurately measured. For this purpose, a SEEC measuring device with spherical collector structure was designed. The device consists of a vacuum system, a baking system, a test system, an electronic readout system, and a magnetic shield system. The measurement of the SEEC from a wide incident energy range (100eV ~ 10keV) and a large incident angle (0°~ 85 °) is realized by using the pulsed electron beam as the incident electron. The energy distribution of the secondary electrons is measured by a multi-layer grid structure. The SEEC of the metallic material was tested by using this device, which proves that the device is stable and good.
        Speaker: Mr Kaile Wen (Institute of High Energy Physics, Chinese Academy of Sciences)
        Slides
      • 5:42 PM
        Discussion time 18m
    • 4:30 PM 6:00 PM
      R4-Semiconductor detectors(4) Room 307

      Room 307

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Benedikt Vormwald (University of Hamburg, Institute of Experimetal Physics) , K.K. Gan (The Ohio State University)
      • 4:30 PM
        The CMS Tracker Phase II Upgrade for the HL-LHC era 18m
        The LHC will reach its third long shutdown period (LS3) around 2024. During this period the machine will be upgraded to the High Luminosity LHC (HL-LHC) increasing its instantaneous luminosity to 5x10^34 cm^-2 s^-1. As a result, an integrated luminosity of about 3000 fb^-1 will be reached after 10 years of running. The drastic increase in luminosity demands for an upgrade of the CMS experiment, the so called Phase II Upgrade. The current tracking detector of the CMS experiment will not be able to operate efficiently after LS3 mainly due to accumulated radiation damage in the silicon sensors. To ensure an efficient operation after LS3 and to profit from the high luminosity conditions, the CMS Tracker will be completely renewed. One of the key aspects of the upgrade are newly designed silicon sensor modules, the so called pT-modules, able to provide information to the L1 trigger. Two types of modules, called PS- and 2S-module, are foreseen. The PS-modules, which will be installed in the inner regions of the CMS Tracker, consist of a silicon strip sensor and a macro pixel sensor which are stacked and closely separated. For the outer regions, the 2S-modules will be installed which consist of two stacked silicon strip sensors with parallel strip orientation. By correlating the hit positions on each sensor, information on the particle's transverse momentum can be gained since the particle tracks are bent by the strong 3.8 T magnetic field of CMS. Using this functionality, particles above a given momentum threshold can be determined and the information is send to the L1 trigger. Instead of the currently used analogue read out chips, binary chips will be used capable of correlating the hit positions of the two stacked silicon sensors. The sensors for the pT-modules will have to withstand fluences of up to 1.5x10^15 neq cm^-2, a factor of 10 larger than the requirement for the present Tracker. P-type base material has been chosen as it was proved to be more radiation hard and to withstand this fluence.
        Speaker: Axel König (Institute of High Energy Physics)
        Slides
      • 4:48 PM
        The Phase-2 ATLAS ITk Pixel Upgrade 18m
        The entire tracking system of the ATLAS experiment will be replaced during the LHC Phase II shutdown (foreseen to take place around 2025) by an all-silicon detector called the “ITk” (Inner Tracker). The innermost portion of the ITk will consist of a pixel detector with stave-like support structures in the most central region and ring-shaped supports in the endcap regions; there may also be novel inclined support structures in the barrel-endcap overlap regions. The new detector could have as much as 14 m2 of sensitive silicon. Support structures will be based on low mass, highly stable and highly thermally conductive carbon-based materials cooled by evaporative carbon dioxide. The ITk will be instrumented with new sensors and readout electronics to provide improved tracking performance compared to the current detector. All the module components must be performant enough and robust enough to cope with the expected high particle multiplicity and severe radiation background of the High-Luminosity LHC. Readout will be based on the new front-end ASIC being developed by the RD53 Collaboration. Ideally the readout chips will be thinned to as little as 100 μm to save material; this presents a challenge for sensor-chip interconnection and options are being evaluated in collaboration with industrial partners to develop reliable processing techniques. Servicing the detector reliably without introducing excessive amounts of material and dead space is another significant challenge. Data cables must be capable of handling up to 5 Gb/s and must be electrical in nature, with optical conversion at larger radii where the radiation background is less intense. Serial powering has been chosen as the baseline for the ITk pixel system as it minimises service cable mass; extensive testing has been carried out to prove its feasibility. Attention must also be paid to grounding and shielding in the detector to mitigate cross-talk and common mode noise. Most of the baseline technological decisions will be taken this year in view of the ITk Pixel TDR to be completed by the end of 2017.
        Speaker: Dr Mathieu Benoit (University of Geneva)
        Slides
      • 5:06 PM
        EXPECTED PERFORMANCE OF THE ATLAS INNER TRACKER AT THE HIGH-LUMINOSITY LHC 18m
        he large data samples at the High-Luminosity LHC will enable precise measurements of the Higgs boson and other Standard Model particles, as well as searches for new phenomena such as supersymmetry and extra dimensions. To cope with the experimental challenges presented by the HL-LHC such as large radiation doses and high pileup, the current Inner Detector will be replaced with a new all-silicon Inner Tracker for the Phase II upgrade of the ATLAS detector. The current tracking performance of two candidate Inner Tracker layouts with an increased tracking acceptance (compared to the current Inner Detector) of |η|<4.0, employing either an ‘Extended’ or ‘Inclined’ Pixel barrel, is evaluated. New pattern recognition approaches facilitated by the detector designs are discussed, and ongoing work in optimising the track reconstruction for the new layouts and experimental conditions are outlined. Finally, future approaches that may improve the physics and/or technical performance of the ATLAS track reconstruction for HL-LHC are considered.
        Speaker: Jason Dhia MANSOUR (ATLAS)
        Slides
      • 5:24 PM
        Pixel Detector Developments for Tracker Upgrades of the High Luminosity LHC 18m
        The talk will report on the INFN ATLAS-CMS joint research activity in collaboration with FBK, which is aiming at the development of new pixel detectors for the LHC Phase-2 upgrades. The talk will cover the main aspects of the research program, starting from the sensor design and fabrication technology, with an outlook on the future steps using both Silicon On Insulator (SOI) and Direct Wafer Bonded (DWB) wafers. The RD covers both planar and 3D, made with columnar technology, pixel devices. All sensors are low thickness n-in-p type, as this is the mainstream foreseen for the HL-LHC pixel upgrades. Results from device characterization measurements will be shown. Hybrid modules, with 100µm and 130µm active thickness, connected to the PSI46dig readout chip, have been tested on beam test experiments. Most recent results from test beams will be presented.
        Speaker: Marco Meschini (I)
        Slides
      • 5:42 PM
        Radiation hardness of small-pitch 3D pixel sensors up to HL-LHC fluences 18m
        3D silicon detectors, with cylindrical electrodes that penetrate the sensor bulk perpendicularly to the surface, present a radiation-hard sensor technology. Due to a reduced electrode distance, trapping at radiation-induced defects is less and the operational voltage and power dissipation after heavy irradiation are significantly lower than for planar devices. During the last years, the 3D technology has matured and 3D pixel detectors are already used in high-energy physics particle detectors where superior radiation hardness is key: in the ATLAS Insertable B-Layer (IBL) and the ATLAS Forward Proton (AFP) detector. For the High-Luminosity upgrade of the Large Hadron Collider (HL-LHC), the radiation-hardness requirements are even more demanding with expected fluences up to 1-2$\times10^{16}\,n_{eq}$/cm$^2$ for the innermost pixel layer of the ATLAS and CMS experiments at the end of life time after an integrated luminosity of 3,000 fb$^{-1}$. Moreover, to face the foreseen large particle multiplicities, smaller pixel sizes of 50$\times$50 or 25$\times$100 $\mu$m$^{2}$ are planned. In the context of this work, a new generation of 3D pixel sensors with small pixel sizes of 50x50 and 25x100 µm² and reduced electrode distances are developed for the HL-LHC upgrade of the ATLAS pixel detector, and their radiation hardness is tested up to the expected high fluences. Since a readout chip with the desired pixel size is still under development by the RD53 collaboration, first prototype small-pitch pixel sensors were designed to be matched to the existing ATLAS IBL FE-I4 readout chip for testing. Irradiation campaigns with such pixel devices have been carried out at KIT with a uniform irradiation of 23 MeV protons to a fluence of 5$\times10^{15}\,n_{eq}$/cm$^2$, as well as at CERN-PS with a non-uniform irradiation of 23 GeV protons to a peak fluence of 1.4$\times10^{16}\,n_{eq}$/cm$^2$. The hit efficiency has been measured in several beam tests at the CERN-SPS in 2016. The benchmark efficiency of 97% has been reached at remarkably low bias voltages of 40 V at 5$\times10^{15}\,n_{eq}$/cm$^2$ or 100 V at 1.4$\times10^{16}\,n_{eq}$/cm$^2$. Thanks to the low operation voltage, the power dissipation can be kept at low levels of 1.5 mW/cm² at 5$\times10^{15}\,n_{eq}$/cm$^2$ and 13 mW/cm² at 1.4$\times10^{16}\,n_{eq}$/cm$^2$ for -25$^{\circ}$C. The performance of these devices is significantly better than for the previous generation of 3D detectors or the current generation of planar silicon pixel detectors, demonstrating the excellent radiation hardness of the new 3D technology.
        Speaker: Joern Lange (IFAE)
        Slides
    • 9:00 AM 10:30 AM
      R1-Particle identification(2) Room 305A

      Room 305A

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Prof. Gerald Eigen (University of Bergen) , Valerio Vagelli (INFN-PG)
      • 9:00 AM
        TORCH: a large-area detector for high resolution time-of-flight measurement 18m
        The TORCH concept is based on the detection of Cherenkov light produced in a quartz radiator plate. It is an evolution of the DIRC technique, extending the performance by the use of precise measurements of the emission angles and arrival times of detected photons. This allows dispersion in the quartz to be corrected for, and the time of photon emission to be determined with a target precision of $\rm 70~ps$ per photon. Combining the information from the 30 or so detected photons from each charged particle that traverses the plate, exceptional resolution on the time-of-flight of order $\rm 15~ps$ should be possible. The TORCH technique is a candidate for application in a future upgrade of the LHCb experiment, for low-momentum charged particle identification. Over a flight distance of $\rm 10~m$ it would provide clean pion-kaon separation up to $\rm 10~GeV$, in the busy environment of collisions at the LHC. Fast timing will also be crucial at higher luminosity for pile-up rejection. A 5-year R&D program has been pursued with industry to develop suitable photon detectors with the required fast timing performance, fine spatial granularity (0.8 mm-wide pixels), long lifetime $\rm (5~C/cm^2$ integrated charge at the anode) and large active area (80% for a linear array). This is being achieved using $\rm 6 \times 6~cm^2$ micro-channel plate PMTs, and final prototype tubes are expected to be delivered early in 2017. Earlier prototype tubes have demonstrated most of the required features individually, using fast read-out electronics that has been developed based on NINO+HPTDC chips. A small-scale prototype of the optical arrangement has been tested in beam at CERN over the last year, and demonstrated close to nominal performance. Components for a large-scale prototype which will be read out using 10 MCP-PMTs, including a highly-polished synthetic quartz radiator plate of dimensions $\rm 125 \times 66 \times 1~cm^3$, are currently being manufactured for delivery on the same timescale. The status of the project will be reviewed, including the latest results from test beam analysis, and the progress towards the final prototype.
        Speaker: Roger Forty (CERN)
        Slides
      • 9:18 AM
        The RICH of the NA62 experiment at CERN 18m
        The NA62 experiment at CERN has been constructed to measure the ultra rare charged Kaon decay into a charged pion and two neutrinos with a 10% uncertainty. The main background is made by the charged kaon decay into a muon and a neutrino which is suppressed by kinematic tools using a magnetic spectrometer and by the different stopping power of muons and pions in the calorimeters. A RICH detector is needed to further suppress the μ+ contamination in the π+ sample by a factor of at least 100 between 15 and 35 GeV/c momentum, to measure the pion crossing time with a resolution of about 100 ps and to produce the trigger for a charged track. The detector consists of a 17 m long tank (vessel), filled with Neon gas at atmospheric pressure. Cherenkov light is reflected by a mosaic of 20 spherical mirrors with 17 m focal length, placed at the downstream end, and collected by 1952 photomultipliers (PMTs) placed at the upstream end. The RICH detector installation was completed in the summer of 2014 and the detector was used for the first time during the pilot run at the end of 2014. The RICH was then operated during the NA62 Commissioning Run in 2015 and has been used in the 2016 Physics Run. It must be noted that in 2014 and 2015 the RICH mirrors alignment was not optimal and the need of a better performance in the pion-muon separation was the main reason for the detector maintenance carried out in the 2015-2016 winter shutdown. In this presentation the construction of the detector will be described and the performance reached during the 2014-2015 data-taking will be discussed. Some preliminary results of the 2016 data-taking will also be shown.
        Speaker: Prof. Andrea Bizzeti (Università di Modena (Italy))
        Slides
      • 9:36 AM
        Machine Learning Techniques for Triggering and Event Classification in Collider Experiments 18m
        Machine learning techniques have already started to take place in the offline analysis of the data obtained with the collider detectors. The implementation is usually in the form of supervised learning where the machine learning algorithms are trained for certain classification or regression tasks and then utilized on the actual data. With recent developments on the hardware that are capable of unsupervised and reinforcement learning to some extent and the increased variety of complex software algorithms, online triggering and event classification could also be made possible. In lepton collider experiments, which basically record every single event, such techniques can be used for online event classification. In hadron collider experiments on the other hand, such systems can be utilized to trigger “out of expectation events” in addition to trigger for “target category of events”. Here, we will discuss possible implementations of machine learning techniques for future collider experiments and demonstrate the implementation of powerful software tools.
        Speaker: Burak Bilki (U)
        Slides
      • 9:54 AM
        CUPID-0: a cryogenic calorimeter with particle identification for double beta decay search. 18m
        With their excellent energy resolution, efficiency, and intrinsic radio-purity, cryogenic calorimeters are primed for the search of neutrino-less double beta decay (0nDBD). The sensitivity of these devices could be further increased by discriminating the dominant alpha background from the expected beta-like signal. The CUPID-0 collaboration aims at demonstrating that the measurement of the scintillation light produced by the absorber crystals allows for particle identification and, thus, for a complete rejection of the alpha background. The CUPID-0 detector, assembled in 2016 and now in commissioning, consists of 26 Zn$^{82}$Se scintillating calorimeters for about 2x10$^{25}$ 0nDBD emitters. In this contribution we present the preliminary results obtained with the detector and the perspectives for a next generation project.
        Speaker: Laura Cardani (I)
        Slides
      • 10:12 AM
        The CUORE bolometric detector for neutrinoless double beta decay searches 18m
        The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment reaching the 1-ton scale. The detector consists of an array of 988 TeO2 crystals arranged in a cylindrical compact structure of 19 towers. The construction of the experiment and, in particular, the installation of all towers in the cryostat was completed in August 2016: the experiment is now in pre-operation phase and data taking is commencing. In this talk, we will discuss the technical challenges of the construction and pre-operation phases, the design choices and measured performance of its electronic instrumentation and the first results from the full detector runs.
        Speaker: Lorenzo Cassina (University of Milano Bicocca)
        Slides
    • 9:00 AM 10:30 AM
      R2-Gaseous detectors(3) Room 305C

      Room 305C

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Bo Yu (Brookhaven National Lab) , Dr Jianbei Liu (University of Science and Technology of China)
      • 9:00 AM
        Upgrade of the ATLAS Thin Gap Chambers Electronics for HL-LHC 18m
        The High-Luminosity LHC (HL-LHC) is planned to start the operation in 2026 with an instantaneous luminosity of 7.5 x 10^34 cm-2s-1. To cope with the event rate higher than that of LHC, the trigger and readout electronics of ATLAS Thin Gap Chamber will need to be replaced. An advanced first-level trigger with fast tracking will be implemented with the transfer of all hit data from the frontend to the backend boards. Studies with the data taken by ATLAS indicate that the advanced trigger could reduce the event rate by 30% for a single muon trigger with a transverse momentum threshold of 15 GeV while maintaining similar efficiency. First prototype of the frontend board has been developed with full functions required for HL-LHC including the data transfer of 256 channels with a 16 Gbps bandwidth and the control of the discriminator threshold. The data transfer has been demonstrated with charged particle beam at the CERN SPS beam facility. The control of the discriminator threshold has also been demonstrated, and a perfect linearity between the set and the measured values was obtained. We will present the overall design of the new trigger and readout electronics as well as the demonstration of the frontend board prototype.
        Speaker: Tomomi Kawaguchi (Nagoya University)
        Slides
      • 9:18 AM
        Small-Strip Thin Gap Chambers for the Muon Spectrometer Upgrade of the ATLAS Experiment 18m
        The instantaneous luminosity of the Large Hadron Collider at CERN will be increased up to a factor of five to seven with respect to the design value by undergoing an extensive upgrade program over the coming decade. Such increase will allow for precise measurements of Higgs boson properties and extend the search for new physics phenomena beyond the Standard Model. The largest phase-1 upgrade project for the ATLAS Muon System is the replacement of the present first station in the forward regions with the so-called New Small Wheels (NSWs) during the long-LHC shutdown in 2019/20. Along with Micromegas, the NSWs will be equipped with eight layers of small-strip thin gap chambers arranged in multilayers of two quadruplets, for a total active surface area of more than 2500 m$^2$. All quadruplets have trapezoidal shapes with surface areas up to 2 m$^2$. To retain the good precision tracking and trigger capabilities in the high background environment of the high luminosity LHC, each sTGC plane must achieve a spatial resolution better than 100 μm to allow the Level-1 trigger track segments to be reconstructed with an angular resolution of approximately 1mrad. The basic sTGC structure consists of a grid of gold-plated tungsten wires sandwiched between two resistive cathode planes at a small distance from the wire plane. The precision cathode plane has strips with a 3.2mm pitch for precision readout and the cathode plane on the other side has pads for triggering. The position of each strip must be known with an accuracy of 40 µm along the precision coordinate and 80 µm along the beam. On such large area detectors, the mechanical precision is a key point and then must be controlled and monitored all along the process of construction and integration. The pads are used to produce a 3-out-of-4 coincidence to identify muon tracks in an sTGC quadruplet. A full size sTGC quadruplet has been constructed and equipped with the first prototype of dedicated front-end electronics. The performance of the full size sTGC quadruplet has been studied at the Fermilab (May 2014) and CERN (October 2014) test beam facilities to study spatial resolution and trigger efficiencies. We will describe the technological novelties, production challenges, performance and test results of the sTGC detectors. The status of the project and the plan for the completion will also be discussed.
        Speaker: Chengguang Zhu (Shandong University)
        Slides
      • 9:36 AM
        Simulation and investigation of the gaseous detector module for CEPC TPC 18m
        Compared with the International Linear Collider (ILC), the beam structure of the future Circular Electron Positron Collider (CEPC) is very different without the ‘power-pulsing’ mode. In this paper, some simulation and estimation results of the Time Projection Chamber (TPC) as one tracker detector option for CEPC were given. The optimized operation gas (Ar:CF4:C2H6=92:7:1) with the fast velocity, low diffusion and low attachment was simulated used Garfield/Garfield++, and the performance of the selection gas was compared with the T2K (Ar:CF4:iC4H10=95:3:2) working gas. The position resolution of deviation was calculated by the space charge caused the track distortions in the drift chamber at Z pole run in CEPC, and the value was less than 10μm in the inner diameter of TPC detector. To meet the critical physics requirements of the tracker detection at CEPC, the new concept structure gaseous detector module as one option for the tracer detector has been developed and experimental measured. Some performance of the concept detector module was obtained. The energy resolution is better than 20% for 5.9 keV X-rays and it indicated that the continuous suppression ions backflow ratio better than 0.1% can be reached at a gain of about 5000. The preliminary results could be compared with simulation and satisfied with the ions suppression requirements of the TPC detector module.
        Speaker: Dr Huirong Qi (Institute of High Energy Physics, CAS)
        Slides
      • 9:54 AM
        The Belle II / SuperKEKB commissioning Time Projection Chambers - characterization, simulation, and results 18m
        Ten 10 cm drift distance Time Projection Chambers (TPCs), filled with He:CO2:70:30 at slightly above one Atmosphere, equipped with a double GEM and a high resolution pixel readout were built by the University of Hawaii to measure fast neutrons produced by the SuperKEKB beam-induced background during the first and second commissioning phases. We characterized the TPCs with two different sources (Fe55 and Po210) and will discuss a TPC simulation validated by these calibration measurements. Finally, we will present the experimental results of the two TPCs installed during the first commissioning phase and the expected results for the 8 TPCs that will be installed during the second commissioning phase.
        Speaker: Igal Jaegle (BEAST II Collaboration - University of Florida)
        Slides
      • 10:12 AM
        PandaX-III: Searching for Neutrinoless Double Beta Decay with High Pressure Xe-136 Gas Time Projection Chambers 18m
        The PandaX-III (Particle And Astrophysical Xenon Experiment III) experiment will search for Neutrinoless Double Beta Decay (NLDBD) of Xe-136 at the China Jin Ping underground Laboratory (CJPL). In the first phase of the experiment, a high pressure gas Time Projection Chamber (TPC) will contain 200 kg, 90% Xe-136 enriched gas operated at 10 bar. Fine pitch micro-pattern gas detector (Microbulk Micromegas) will be used at both ends of the TPC for the charge readout with a cathode in the middle. Charge signals can be used to reconstruct tracks of NLDBD events and provide good energy and spatial resolution. In this talk, I will give an overview of recent progress of PandaX-III, including data taking of a prototype TPC at Shanghai.
        Speaker: Prof. Ke Han (Shanghai Jiao Tong University)
        Slides
    • 9:00 AM 10:30 AM
      R3-Trigger and data acquisition systems(4) Room 305E

      Room 305E

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Jinlong Zhang (A) , Ralf SPIWOKS (CERN)
      • 9:00 AM
        Electronics, trigger and data acquisition systems for the INO ICAL experiment 18m
        India-based Neutrino Observatory (INO) has proposed construction of a 50kton magnetised Iron Calorimeter (ICAL) in an underground laboratory located in South India. Main aims of this, now funded project are to precisely study the atmospheric neutrino oscillation parameters and to determine the ordering of neutrino masses. The detector will deploy about 28,800 glass Resistive Plate Chambers (RPCs) of approximately 2m  2m in area. About 3.6 million detector channels are required to be instrumented. The analog front-end comprises mainly of 4-channel preamplifier and 8-channel leading edge discriminator ASICs. The digital front-end is implemented using a high-end FPGA, a TDC ASIC and a network controller chip. The multi-level trigger system generates the global trigger signal based solely on event topology information. A dedicated sub-system handles distribution of global clock and trigger signals as well as measurement of time offsets due to disparate signal path lengths. The data, acquired on receipt of trigger signal by the digital front-end sub-system is dispatched to the backend data concentrator hosts via a multi-tier network. Finally, the event data is compiled by the event builder, which also performs various data quality monitors on the data besides archiving the same. We will present the design of electronics, trigger and data acquisition systems of this ambitious and indigenous experiment as well as its current status of deployment.
        Speaker: Dr Satyanarayana Bheesette (Tata Institute of Fundamental Research)
        Slides
      • 9:18 AM
        The ATLAS Level-1 Trigger System with 13TeV nominal LHC collisions 18m
        The Level-1 (L1) Trigger system of the ATLAS experiment at CERN's Large Hadron Collider (LHC) plays a key role in the ATLAS detector data-taking. It is a hardware system that selects in real time events containing physics-motivated signatures. Selection is purely based on calorimetry energy depositions and hits in the muon chambers consistent with muon candidates. The L1 Trigger system has been upgraded to cope with the more challenging run-II LHC beam conditions, including increased centre-of-mass energy, increased instantaneous luminosity and higher levels of pileup. This talk summarises the improvements, commissioning and performance of the L1 ATLAS Trigger for the LHC run-II data period. The acceptance of muon triggers has been improved by increasing the hermiticity of the muon spectrometer. New strategies to obtain a better muon trigger signal purity were designed for certain geometrically difficult transition regions by using the ATLAS hadronic calorimeter. Algorithms to reduce noise spikes in muon trigger rates were also deployed. L1 Calorimeter Trigger underwent various major upgrades. At the pre-prosessing stage, more than 1700 FPGA-based daughter boards were exchanged which replace the previous ASIC-based modules. The new modules enable significantly improved pile-up control, such as dynamic bunch-by-bunch pedestal correction as well as an enhanced signal-to-noise ratio by the use of digital autocorrelation Finite Impulse Response filters. Furthermore the digitisation speed was doubled to 80 MHz which allows for improved treatment of saturated signals and refined input timing. The firmware of the subsequent object finding hardware components was modified to add extra selectivity, such as energy-dependent electromagnetic isolation criteria in the cluster processor. In addition, the transmission bandwidths were enlarged, as well as new merger modules introduced that provided flexibility for the integration of a brand new system: the ATLAS L1 Topological Trigger. The ATLAS L1 Topological trigger uses physically motivated kinematic quantities of triggered candidates to reject undesired background processes extending the reach of the ATLAS physics program. The Central Trigger Processor, heart of the ATLAS L1 Trigger system, was also upgraded. Its hardware, firmware and software architectures were redesigned. It now allows twice as many trigger channels, a much more flexible handling of detector dead-times, the possibility of concurrent independent triggering of up to 3 different sub-detector combinations and the handling interface to the new topological trigger system.
        Speaker: Louis Helary (CERN)
        Slides
      • 9:36 AM
        Modelling Resource Utilization of a Large Data Acquisition System 18m
        The ATLAS 'Phase-II' upgrade, scheduled to start in 2024, will significantly change the requirements under which the data-acquisition system operates. The input data rate, currently fixed around 150 GB/s, is anticipated to reach 5 TB/s. In order to deal with the challenging conditions, and exploit the capabilities of newer technologies, a number of architectural changes are under consideration. Of particular interest is a new component, known as the Storage Handler, which will provide a large buffer area decoupling real-time data taking from event filtering. Dynamic operational models of the upgraded system can be used to identify the required resources and to select optimal techniques. In order to achieve a robust and dependable model, the current data-acquisition architecture has been used as a test case. This makes it possible to verify and calibrate the model against real operation data. Such a model can then be evolved toward the future ATLAS Phase-II architecture. In this paper we introduce the current and upgraded ATLAS data-acquisition system architectures. We discuss the modeling techniques in use and their implementation. We will show that our model reproduces the current data acquisition system's operational behaviour and present the plans and initial results for Phase-II system model evolution.
        Speaker: Santos Alejandro (CERN,the University of Heidelberg, Germany)
        Slides
      • 9:54 AM
        An general high performance xTCA compliant and FPGA based Data Processing Unit for trigger and data acquisition and trigger applications 18m
        This talk will be about an new version of high performance xTCA compliant and FPGA based Data Processing Unit for trigger and data acquisition applications like in PANDA, PXD/BelleII upgrade and CMS trigger. The Unit consists of 4 Advanced Mezzanine Cards (AMC, called xFP card), 1 AMC carrier ATCA board(ACAB) and 1 Rear Transition I/O Board(RTM). The ACAB board features 1 Xilinx Ultrascale XCKU060 FPGA chip, 16GBytes DDR4 memory, 5 ports Gigabit Ethernet Switch and 1 10G Ethernet port for data processing, buffering and switching. Gigabit Ethernet Switch is designed switching four xFP cards and ACAB board Ethernet ports to ATCA Backplane fabric port. And the xFP board features 1 xilinx Virtex-5 FX70T FPGA chips and 4GBytes DDR2 memory for data processing. The connection between ACAB board and four xFP boards are by RocketIO port and other LVDS I/O pairs. 8 optical links by 4 xFP4(with two 6Gbps optical IO) cards provide an input bandwidth of 48Gbps and 16 optical link by 4 xFP3.1(with four 4Gbps optical IO) cards provide an highest input bandwidth of 64Gbps. Optical links can either from panel of AMC card or from RTM card. A single ATCA shelf can host up to 14 boards interconnected via a full mesh backplane. Each board can directly connect to any other 13 boards point-to-point via 10G RocketIO link.A prototype unit will be shown and some functions tests will be reported and discussed. Key words: xTCA, AMC, ACAB, RTM, RocketIO, DDR4
        Speaker: Mr Jingzhou ZHAO Jingzhou (高能所)
        Slides
      • 10:12 AM
        FELIX: the new detector readout system for the ATLAS experiment 18m
        After the Phase-I upgrade and onward, the Front-End Link eXchange (FELIX) system will be the interface between the data handling system and the detector front-end electronics and trigger electronics at the ATLAS experiment. FELIX will function as a router between custom serial links and a commodity switch network which will use standard technologies to communicate with data collecting and processing components. The FELIX system is being developed by using commercial-off-the-shelf server PC technology in combination with a FPGA-based PCIe Gen3 I/O card interfacing to GigaBit Transceiver links and with Timing, Trigger and Control connectivity provided by an FMC-based mezzanine card. Dedicated firmware for the Xilinx FPGA (Virtex 7 and Kintex UltraScale) installed on the I/O card alongside an interrupt-driven Linux kernel driver and user-space software will provide the required functionality. On the network side, the FELIX unit connects to both Ethernet-based network and Infiniband. The system architecture of FELIX will be described and the results of the development program currently in progress will be presented.
        Speaker: Jinlong Zhang
        Slides
    • 9:00 AM 10:30 AM
      R4-Semiconductor detectors(5) Room 307

      Room 307

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Benedikt Vormwald (University of Hamburg, Institute of Experimetal Physics) , Prof. Qun OUYANG (IHEP)
      • 9:00 AM
        CMOS pixel development for the ATLAS experiment at the HL-LHC 18m
        To cope with the rate and radiation environment expected at the HL-LHC new approaches are being developed on CMOS pixel detectors, providing charge collection in a depleted layer. They are based on: HV enabling technologies that allow to use high depletion voltages (HV-MAPS), high resistivity wafers for large depletion depths (HR-MAPS); radiation hard processed with multiple nested wells to allow CMOS electronics embedded with sufficient shielding into the sensor substrate and backside processing and thinning for material minimization and backside voltage application. Since 2014, members of more than 20 groups in the ATLAS experiment are actively pursuing CMOS pixel R&D in an ATLAS Demonstrator program pursuing sensor design and characterizations. The goal of this program is to demonstrate that depleted CMOS pixels, with monolithic or hybrid designs, are suited for high rate, fast timing and high radiation operation at LHC. For this a number of technologies have been explored and characterized. In this presentation the challenges for the usage of CMOS pixel detectors at HL-LHC are discussed such as fast read-out and low power consumption designs as well as fine pitch and large pixel matrices. Different designs of CMOS prototypes are presented with emphasis on performance and radiation hardness results, and perspectives of application in the upgrade of the ATLAS tracker will be discussed.
        Speaker: Ristic Branislav (C)
        Slides
      • 9:18 AM
        Integrated CMOS sensor technologies for the CLIC tracker 18m
        The tracking detector at the proposed high-energy CLIC electron-positron collider will be based on small-pitch silicon pixel- or strip sensors arranged in a multi-layer barrel and end-cap geometry with a total surface of about 90 sqm. The requirements include single-point position resolutions of a few microns and time stamping with an accuracy of approximately 10 ns, combined with a low material budget of less than 2% of a radiation length per layer, including cables, cooling and supports. Mainly fully integrated CMOS sensors are under consideration. One of the candidate technologies is based on a 180 nm CMOS process with a high-resistivity substrate. Test beam measurements and TCAD simulations were performed for demonstrator chips consisting of an array of analog pixel matrices with different pixel pitch and a variety of collection-electrode geometries and process options. The analog signals of each matrix are read out by external sampling ADCs, allowing for a precise characterisation of the signal response. In this contribution we present the sensor design and show results from recent test-beam campaigns, as well as comparisons with TCAD simulations. The results show good spatial and timing resolution in line with the requirements for the CLIC tracker.
        Speaker: Magdalena Munker (CERN, Geneva, Switzerland)
        Slides
      • 9:36 AM
        Analysis and simulation of HV-CMOS assemblies for the CLIC vertex detector 18m
        The requirement of precision physics and the environment found in the proposed future high-energy linear e+e- collider CLIC, result in challenging constraints for the vertex detector. In order to reach the performance goals, various sensor technologies are under consideration. Prototypes of an active pixel sensor with 25 μm pitch (CCPDv3) have been fabricated in a commercial 180 nm High-Voltage CMOS technology. The sensors are capacitively coupled to CLICpix readout ASICs with matching footprint, implemented in a commercial 65 nm CMOS process. Tests of the assemblies were carried out at the CERN SPS using 120 GeV pions over an angular range of 0°-80°. The measurements have shown an excellent tracking performance with an efficiency of >99% and a resolution of 5-7 μm over the angular range. These were then compared to simulations carried out using TCAD, showing a good agreement for the current-voltage, breakdown and charge collection properties. The simulations have also been used to optimise features for future sensor design.
        Speaker: Mr Matthew Buckland (University of Liverpool)
        Slides
      • 9:54 AM
        Capacitively Coupled Pixel Detectors: From design simulations to test beam 18m
        An overview on the characterisation of aH35 HV-CMOS active pixel sensors for the ATLAS ITk. Capacitively Coupled Pixel Detectors (CCPDs) are only possible due to HV-CMOS sensors, where the high voltage (necessary to deplete the sensor) can be applied on CMOS circuits, allowing the sensor to be capacitively coupled to a read out ASIC, avoiding the expensive bump-bonds. An extensive work is done in the characterisation of this new sensor technology. TCAD simulations of the HV-CMOS pixel designs and TCT measurements on real devices is shown. In addition, automatised wafer probing measurements and the flip-chip, of the sensors with the readout chips, will be presented, and the FPGA-based read out system developed is introduced. Laboratory measurements, such as DAC scans and test-pulse calibration, will be shown. To conclude, test beam measurements done at CERN SPS and at Fermilab, using the UniGE FE-I4 Telescope, with non-irradiated and irradiated samples of the AMS-H18 CCPDv4 and H35 full-size demonstrator, will be shown and discussed.
        Speaker: Mateus Vicente (U)
        Slides
      • 10:12 AM
        Enhanced lateral drift sensors: concept and development 18m
        Future experiments in particle physics require few-micrometer position resolution in their tracking detectors. Silicon is today's material of choice for high-precision detectors and offers a high grade of engineering possibilities. Instead of scaling down pitch sizes, which comes at a high price for increased number of channels, our new sensor concept seeks to improve the position resolution by increasing the lateral size of the charge distribution already during the drift in the sensor material. To this end, it is necessary to carefully engineer the electric field in the bulk of this so-called enhanced lateral drift (ELAD) sensor. This is achieved by implants with different values of doping concentration deep inside the bulk which allows for modification of the drift path of the charge carriers in the sensor. In order to find an optimal sensor design, detailed simulation studies have been conducted using SYNOPSYS TCAD. The parameters that need to be defined are the geometry of the implants, their doping concentration and the position inside the sensor. Process simulations are used to provide the production-determined shapes of the implants in order to allow for a realistic modelling. Results of a geometry optimisation are shown realising an optimal charge sharing and hence position resolution. A position resolution of a few micrometer was achieved by using deep implants without relying on a Lorentz drift or tilted incident angle. Additionally, a description of the multi-layer production process is presented, which represents a new production technique allowing for deep bulk engineering.
        Speaker: Ms Anastasiia Velyka (DESY Hamburg)
        Slides
    • 10:30 AM 11:00 AM
      Tea Break 30m Corridor on the third floor

      Corridor on the third floor

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
    • 11:00 AM 12:30 PM
      R1-Interface and beam instrumentation Room 305A

      Room 305A

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Christian Bohm (Stockholm University) , Prof. Jin Li (IHEP/THU)
      • 11:00 AM
        Electron Test Beams at SLAC 18m
        We present status of and future plans for the various electron test beam lines at SLAC. The presentation will focus on ESTB, the End Station (A) Test Beam, which after rebuilds during 2017, will continue to deliver 2 to 16 GeV primary electrons (10^9) per pulse, or single electron (1-100) per pulse at 5Hz rate. These beams have been used by around 500 Users in 38 experiments over the past 4 years for detector R&D (RHIC, ATLAS, g-2, etc.) and accelerator physics experiments. In addition SLAC is currently operating ASTA, a 5MeV electron beam line with ultra short pulses and NLCTA beam lines which provides electron beams between 60 and 300 MeV. FACET-II, which will provide 10 GeV very high current and very short pulsed electron and positron beams, is in its planning stage for delivering beams in 2019.
        Speaker: Carsten Hast (S)
        Slides
      • 11:18 AM
        Scattering studies with the DATURA beam telescope 18m
        High-precision particle tracking devices allow for two-dimensional analyses of the material budget distribution of particle detectors and their periphery. These tracking devices, called beam telescopes, enable a precise measurement of the track of charged particles with an angular resolution in the order of a few ten microradian and a position resolution of a few micrometer. The material budget is reconstructed from the variance of the angular distribution of the scattered particles. Similarly, a new tomographic technique exploiting the deflection of electrons with an energy of a few GeV in a sample requires precise reference measurements of the scattering angle distribution of targets of known thicknesses. At the DESY test-beam facilities, the DATURA beam telescope, a high-precision tracker using pixel sensors, was used to record GeV electrons traversing aluminium targets with precisely known thickness between 13 um and 1e4 um. A track reconstruction was performed enabling the measurement of the scattering angle at the target due to multiple scattering therein. For that purpose, the General Broken Lines method was used incorporating a new unbiased target-material estimator. In response to the increased interest in material budget measurements, we present the reconstruction of electron tracks and detail the analysis and accuracy of the angular deflection measurements. The width and the shape of the recorded distributions are compared to theoretical estimates and Geant4 simulations. Additionally, calibration techniques required as input for precise tomographic reconstructions are discussed.
        Speaker: Dr Hendrik Jansen (DESY)
        Slides
      • 11:36 AM
        CLAWS - A Plastic Scintillator / SiPM based Detector measuring Backgrounds during the Commissioning of SuperKEKB 18m
        The SuperKEKB collider at KEK, which has started its commissioning in February 2016, is designed to achieve unprecedented luminosities, with a factor 40 higher than the record-breaking luminosity of the KEKB machine. For the operation of the Belle II detector, in particular of its pixel vertex detector, a precise understanding of the background conditions at the interaction point is crucial. To study backgrounds, a dedicated detector setup consisting of different subsystems has been installed for the first commissioning phase of the accelerator. Among those systems is CLAWS, consisting of 8 scintillator tiles with directly coupled SiPMs, read out by computer-controlled oscilloscopes with very deep buffers. CLAWS focuses on the background connected to the continuous injection of the accelerator, by monitoring the background levels of individual particle bunches in the machine with sub-nanosecond resolution continuously over ms time-frames. We will present the technology of the CLAWS detectors, the overall installation and the detector performance including the calibration, time resolution and observed effects from the moderate radiation dose received during operation. We will also discuss selected results on the time structure of the injection background during the first phase of SuperKEKB, and present the plans for an upgraded system to be installed as part of the Belle II inner detector for the second commissioning phase scheduled for spring 2018.
        Speaker: Windel Hendrik (Max-Planck-Institute for Physics)
        Slides
      • 11:54 AM
        CMS Central Beam Pipe Instrumentation with Fiber Bragg Grating Sensors: Two Years of Data Taking 18m
        We present the recent results of the monitoring of the central beam pipe of the Compact Muon Solenoid Experiment (CMS), at the European Organization for Nuclear Research (CERN). The measurements are carried out by means of an innovative fiber optic monitoring system based on the Fibre Bragg Grating (FBG) sensor technology. The CMS central beam pipe is part of the Large Hadron Collider (LHC) and is the place where the high energy LHC collisions take place. It is made of a beryllium tube section, 3m long with a central diameter of 45mm and 0.8mm thickness wall, sealed on the two extremities with two conical aluminium sections, each 1.5m long. Being spectrally encoded, the FBG sensors are insensible to electromagnetic interference, intensity modulation of the optical carrier and broadband-radiation-induced losses. Hence, fiber optic monitoring system based on FBG sensors represents the ideal solution to achieve a reliable and accurate sensing system to be used 24/7 in the harsh environment in the CMS experimental facility. Our monitoring system consists of four polyimide coated SMF28 fibers (200μm diameter: core-cladding-coating) placed along the cardinal longitudinal positions on beam pipe cross section. On each fiber, 16 FBGs have been manufactured: 7 are solidary glued on the pipe to measure the local strain and the remaining 9, are left unglued but in contact with the pipe in order to work as local thermometers and as temperature compensators for the adjacent strain sensors. The mechanical complexity of the structure will be described and the first temperature and strain measurements data recorded during the LHC operations will be discussed. The data recorded have proven the overall sensitivity and reliability of this innovative monitoring system. The designed system allows the monitoring of any deformation induced on the CMS central beam pipe during the detector motion in the maintenance periods and magnetic field induced deformation during operation phases. Moreover, the temperature FBG sensors represents a unique solution to monitor the beam pipe thermal behaviour during the various operational and maintenance phases. This innovative solution will be a milestone for beam pipe monitoring in high energy physics.
        Speaker: Dr Francesco Fienga (University of Napoli Federico II)
    • 11:00 AM 12:30 PM
      R2-Neutrino Detectors(3) Room 305C

      Room 305C

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Mr Kejun ZHU (高能所) , Dr Liangjian Wen (高能所)
      • 11:00 AM
        The JUNO VETO detector system 18m
        The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton liquid scintillator detector with primary physics goal the neutrino mass hierarchy determination. The detector will be built in 700m deep underground laboratory. A multi-veto system will be built for cosmic muon detection and background reduction. The outer of the central detector is filled with water and equipped with ~2000 MCP-PMTs (20 inches) to form a water Cherenkov detector for muon tagging. Both the water Cherenkov detector walls and the central detector external surface are coated with Tyvek reflector to increase the light collection efficiency. A Top Tracker (TT) detector will be built by re-using the Target Tracker of the OPERA experiment. The TT consists of 62 walls made of plastic scintillator strips equipped with WLS fibers with dimension 6.8m*6.8m each, and allows x-y readout for precise muon tracking. The three layers of the TT with the appropriate trigger electronics will help to understand the cosmogenic background contribution and reduction as the one induced by the isotopes 9Li and 8He.. It will cover half of the top area with three layers spaced my one meter. The muon detection efficiency is >95% for water Cherenkov detector. With this veto system, the cosmic muon induced fast neutron background can be reduced at the level of ~0.1/day.
        Speaker: Mr Haoqi Lu (IHEP)
        Slides
      • 11:18 AM
        The ANNIE experiment: measuring neutron yield from neutrino-nucleus interactions 18m
        The Accelerator Neutrino Neutron Interaction Experiment (ANNIE) is a Water Cherenkov (WCh) - based neutrino experiment downstream of the Booster Neutrino Beam at Fermilab, designed to study the abundance of final state neutrons from neutrino-nucleus interactions. The measurement is enabled by two new techniques with wide relevance for neutrino physics: (1) the first application of Large-Area Picosecond Photodetectors (LAPPDs) to localize primary neutrino interaction vertices within a small fiducial volume through precision timing measurement, and (2) the use of gadolinium-doped water to count the number of final-state neutrons through the measurement of emitting gammas from neutron captures. Phase I of ANNIE is currently being performed on the Booster Neutrino Beam (BNB) in Fermilab, aiming to provide the neutron background of neutrino interactions. A small movable volume of gadolinium-loaded liquid scintillator is used to measure the rate of neutron events as a function of positions inside the water tank. Phase II of ANNIE is designed to fully demonstrate the realization of the ANNIE detector. During this stage, additional PMTs and functional LAPPDs will be covering the entire water tank, which enables detailed reconstruction of kinematics. This presentation will give an overview of the experiment, the techniques to be used, the reconstruction algorithms and the current project progress.
        Speaker: Jingbo Wang (U)
        Slides
      • 11:36 AM
        The KM3NeT Digital Optical Module 18m
        KM3NeT is a European deep-sea multidisciplinary research infrastructure in the Mediterranean Sea. It will host a km3-scale neutrino telescope and dedicated instrumentation for long-term and continuous measurements for Earth and Sea sciences. The KM3NeT neutrino telescope is a 3-dimensional array of Digital Optical Modules (DOMs), suspended in the sea by means of vertical string structures, called Detection Units, supported by two Dyneema ropes, anchored to the seabed and kept taut with a system of buoys. The Digital Optical Module represents the active part of the neutrino telescope and therefore the real heart of KM3NeT. It consists in a pressure-resistant borosilicate glass spherical vessel housing 31 photomultiplier tubes and the associated front-end and readout electronics. The aim is to provide nanosecond precision on the arrival time of single Cherenkov photons and directional information with a high sensitive surface (1260 cm2) and an almost isotropic field of view. Temperature and humidity sensors are used to monitor the environmental conditions, while a system of compasses and calibration components provide precision about the position and orientation of the photo-sensors up to a few centimetres and few degrees, respectively. In this contribution the design and the performances of the KM3NeT Digital Optical Modules are discussed, with a particular focus on enabling technologies and integration procedure.
        Speaker: daniele vivolo (I)
        Slides
      • 11:54 AM
        Discussion time 18m
    • 11:00 AM 12:30 PM
      R3-Front-end electronics and fast data transmission(2) Room 305E

      Room 305E

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Johan Borg (Imperial College London) , christophe de La Taille (OMEGA)
      • 11:00 AM
        Electronics and triggering challenges for the CMS High Granularity Calorimeter for HL-LHC 18m
        The High Granularity Calorimeter (HGCAL), presently being designed by the CMS collaboration to replace the CMS endcap calorimeters for the High Luminosity phase of LHC, will feature six million channels distributed over 52 longitudinal layers. The requirements for the front-end electronics are extremely challenging, including high dynamic range (0-10 pC), low noise (~2000e- to be able to calibrate on single minimum ionising particles throughout the detector lifetime) and low power consumption (~10mW/channel), as well as the need to select and transmit trigger information with a high granularity. Exploiting the intrinsic precision-timing capabilities of silicon sensors also requires careful design of the front-end electronics as well as the whole system, particularly clock distribution. The harsh radiation environment and requirement to keep the whole detector as dense as possible will require novel solutions to the on-detector electronics layout. Processing all the data from the HGCAL imposes equally large challenges on the off-detector electronics, both for the hardware and incorporated algorithms. We present an overview of the complete electronics architecture, as well as the performance of prototype components and algorithms.
        Speaker: Johan Borg (I)
        Slides
      • 11:18 AM
        Progress of PandaX-III readout electronics 18m
        The PandaX-III (Particle And Astrophysical Xenon Experiment III) experiment, with the scientific objective of searching for neutrinoless double beta decay, is going to be carried out at the China Jin Ping underground Laboratory (CJPL). In the first phase of the experiment, a Time Projection Chamber (TPC) with 200 kg Xenon gas at the pressure of 10 bar is to be constructed. A total of 82 Micromegas modules using the Microbulk technique will be installed for the two endcaps of the TPC. For each Micromegas module, there are 64 X, 64 Y readout strips and one mesh, which results in 10496 strip signals and 82 mesh signals for one TPC. In order to accomplish the readout task for the 10496 strip signals and 82 mesh signals of the Phase-I TPC, an electronics system following a modular and multi-level design concept is proposed. At the bottom level, there are 42 FEC (Front-end Card) based on the 64-channel ASIC chips named AGET, and 2 MRC (Mesh Readout Card) modules. At the higher level, there are the back-end electronics, including two S-TDCMs (Slave Trigger and Data Concentration Modules) and one MTCM (Master Trigger and Clock Module), which collect the event data and perform the trigger function. Currently the first version of the FEC module and MRC module, as well as a DAQ (Data Acquisition) Board which plays the role as the prototype of back-end electronics, have been successfully developed. Joint-test with a prototype TPC was performed at Shanghai and preliminary results which consisted with expectation were obtained. The details of the electronics design and the progresses will be described in this paper.
        Speaker: Dr Changqing Feng (University of Science & Technology of China)
        Slides
      • 11:36 AM
        Development of Trigger and Readout Electronics for the ATLAS New Small Wheel Detector Upgrade 18m
        The present small wheel muon detector at ATLAS will be replaced with a New Small Wheel (NSW) detector to handle the increase in data rates and harsh radiation environment expected at the LHC. Resistive Micromegas and small-strip Think Gap Chambers will be used to provide both trigger and tracking primitives. Muon segments found at NSW will be combined with the segments found at the Big Wheel to determine the muon transverse momentum at the first-level trigger. A new trigger and readout system is developed for the NSW detector. The new system has about 2.4 million trigger and readout channels and about 8,000 frontend boards. The large number of input channels, short time available to prepare and transmit data, harsh radiation environment, and low power consumption all impose great challenges on the design. We will discuss the overall electronics design and studies with various ASIC and board prototypes.
        Speaker: Daniel Antrim (University of California, Irvine)
        Slides
      • 11:54 AM
        First Prototype of the Muon Frontend Control Electronics for the LHCb Upgrade: Hardware Realization and Test 18m
        The muon detector plays a key role in the trigger of the LHCb experiment at CERN. The upgrade of its electronics is required in order to be compliant with the new 40 MHz readout system, designed to cope with future LHC runs between five and ten times the initial design luminosity. The framework of the Service Board System upgrade is aimed to replace the system in charge of monitoring and tuning the 120’000 readout channels of the muon chambers. The aim is to provide a more reliable, flexible and fast means of control migrating from the actual distributed local control to a centralized architecture based on a custom high speed serial link and a remote software controller. In this paper we present in details the new Service Board System hardware prototypes from the initial architectural description to board connections, highlighting the main functionalities of the designed devices with preliminary test results.
        Speaker: Dr Paolo Fresch (INFN Sezione di Roma)
        Paper
        Slides
    • 11:00 AM 12:30 PM
      R4-Photon detectors(5) Room 307

      Room 307

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Prof. Gerald Eigen (University of Bergen) , Valerio Vagelli (INFN-PG)
      • 11:00 AM
        Development of Superconducting Tunnel Junction Photon Detector with Cryogenic Preamplifier for COBAND experiment 18m
        We present the status of the development of Superconducting Tunnel Junction (STJ) detector with the cryogenic preamplifier as a far-infrared single photon detector for the COsmic BAckground Neutrino Decay search (COBAND) experiment. The photon energy spectrum from the radiative decay of cosmic background neutrino is expected to have a sharp cutoff at high energy end in a far-infrared region ranging from 15meV to 30meV. The detector is required to measure an individual photon energy with a sufficient energy resolution less than 2% for identifying the cutoff structure, and to be designed for a rocket or satellite experiment. We develop a diffraction grating and an array of Nb/Al-STJ pixels, where each pixel can detect a single far-infrared photon delivered by the grating according to its wavelength. An amplifier is required to have a level of 10 electron equivalent-noise for the Nb/Al-STJ. To achieve high signal-to-noise ratio of the STJ, we use a preamplifier made with the Silicon on Insulator (SOI) technique that can be operated at low temperature around 0.3K. We have developed the Nb/Al-STJ with the SOI cryogenic preamplifier and have tested the detector performance around 0.3K. The present status of this STJ detector development is reported in details.
        Speaker: Prof. Shinhong Kim (University of Tsukuba)
        Slides
      • 11:18 AM
        Cryogenic light detectors for background suppression: the CALDER project 18m
        Background rejection plays a key role for experiments searching for rare events, like neutrino-less double beta decay (0$\nu$DBD) and dark matter interactions. Among the several detection technologies that were proposed to study these processes, cryogenic calorimeters (bolometers) stand out for the excellent energy resolution, the ease in achieving large source mass, and the intrinsic radio-purity. Moreover, bolometers can be coupled to a light detector that measures the scintillation or Cherenkov light emitted by interactions in the calorimeter, enabling the identification of the interacting particle (alpha, nuclear recoil or electron) by exploiting the different light emission. This feature allows to disentangle possible signals from the background produced by all the other interactions that, otherwise, would dominare the region of interest, preventing the achievement of a high sensitivity. Next generation bolometric experiments, such as CUPID, are demanding for very competitive cryogenic light detectors. The technology for light detection must ensure an RMS noise resolution lower than 20 eV, a wide active surface (several cm$^2$) and a high intrinsic radio-purity. Furthermore, the detectors have to be multiplexable, in order to reduce the number of electronics channels for the read-out, as well as the heat load for the cryogenic apparatus. Finally they must be characterized by a robust and reproducible behavior, as next generation detectors will need hundreds of devices. None of the existing light detectors satisfies all these requests. In this contribution I will present the CALDER project, a recently proposed technology for light detection which aim to realize a device with all the described features. CALDER will take advantage from the superb energy resolution and natural multiplexed read-out provided by Kinetic Inductance Detectors (KIDs). These sensors, that have been successfully applied in astro-physics searches, are limited only by their poor active surface, of a few mm$^2$. For this reason, we are exploiting the phonon-mediated approach: the KIDs are deposited on an insulating substrate featuring a surface of several cm$^2$. Photons emitted by the bolometer interact in the substrate and produce phonons, which can travel until they are absorbed by a KID. The first phase of the project was devoted to the optimization of the KIDs design, and to the understanding/suppression of the noise sources. For this phase phase we chose a well-known material for KIDs application, aluminum, which according to our detector model allows to reach a noise resolution of about 80 eV RMS. In the second phase we are investigating more sensitive materials (like Ti, Ti-Al, TiN) which will allow to reach the target sensitivity. In this contribution I will present the results obtained at the end of the first project phase in terms of efficiency and energy resolution, and I will present the encouraging results obtained at the beginning of the second project phase.
        Speaker: Dr Nicola Casali (INFN-Roma1)
        Slides
      • 11:36 AM
        The Mu2e Calorimeter Photosensors 18m
        The Mu2e experiment at FNAL aims to measure the charged-lepton flavor violating neutrinoless conversion of a negative muon into an electron. The conversion results in a monochromatic electron with an energy slightly below the muon rest mass (104.97 MeV). The calorimeter should confirm that the candidates reconstructed by the extremely precise tracker system are indeed conversion electrons while performing a powerful µ/e particle identification. The baseline version of the calorimeter is composed by two disks of inner filled by 1348 pure CsI crystals of 20 cm length. Each crystal is readout by two large area custom SiPMs. We translate the calorimeter requirements in a series of technical specification for the photo sensors that are summarized in the following list: (i) a good photon detection efficiency (PDE) of above 20%, for wavelengths around 310 nm to well match the light emitted by the un-doped CsI crystals; (ii) a large light collection area that in combination with (i) provides a light yield of above 20 p.e./MeV; (iii) a fast rise time; (iv) a narrow signal width to improve pileup rejection; (v) a high gain and (vii) the capability of surviving in presence of 1 Tesla magnetic field, operating in vacuum and in the harsh Mu2e radiation environment. Our solution to all of this is an array of large area UV extended Silicon Photomultipliers (SiPM) connected in series configuration.
        Speaker: ivano sarra (I)
        Paper
        Slides
      • 11:54 AM
        APPLICATION OF MOBILE TECHNOLOGY TO PHOTOMULTIPLIER TUBE READOUT FOR PARTICLE PHYSICS EXPERIMENTS 18m
        J.Thomas, A. Loving, J. Kelley, C. Wendt - University of Wisconsin, Madison Water Cherenkov neutrino physics experiments typically utilize thousands of large area PhotoMulitplier- Tubes (PMTs) distributed around water volumes of size 105 m3. The precision of the physics results de- pends on the overall enclosed volume, and so larger detectors of order 106 m3 are desirable but presently hindered by the typical large costs involved. As part of the novel CHIPS neutrino detector, which drastically reduces several potentially dominant construction costs, we are developing intelligent, low-cost data ac- quisition modules that will be installed directly with each PMT. The new system takes advantage of recent rapid development of ARM chips used in Raspberry Pi[12], BeagleBone[13] (BB) and other single-board computers, because they are very small, inexpensive and consume very little power. More generally, ARM chips are found in almost every mobile phone, are practically bug-free, hugely adaptable and versatile, and can be applied (rather than developed from scratch) to work at the very front end of a particle physics experiment. With a 1GHz clock, cable Ethernet and a micro USB power supply, the single board computers provide a complete suite of functionality. The White Rabbit[15] (WR) system developed at CERN and GSI for a timing distribution network with sub-nanosecond accuracy over Ethernet delivers encoded PPS timing signals. These three technology developments together provide an innovative and very inexpensive electronics platform for neutrino physics. Looking at the detector construction, the PMTs, and the electronics, we expect the final costs to be dominated by the PMTs themselves.
        Speaker: Prof. jennifer thomas (ucl)
        Slides
    • 12:30 PM 2:00 PM
      LUNCH (Bento box) 1h 30m Corridor on the third floor

      Corridor on the third floor

    • 2:00 PM 3:30 PM
      R1-Calorimeters(5) Room 305A

      Room 305A

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Gianantonio Pezzullo (INFN-PI) , Igal Jaegle (University of Florida)
      • 2:00 PM
        Commissioning of the CMS Hadron Forward Calorimeters Phase I Upgrade 18m
        The final phase of the CMS Hadron Forward Calorimeters Phase I upgrade is being performed during the Extended Year End Technical Stop of 2016 – 2017. In the framework of the upgrade, the PMT boxes are being reworked to implement two channel readout in order to exploit the benefits of the multi-anode PMTs in background tagging and signal recovery. The front-end electronics is also being upgraded to QIE10-based electronics which will implement larger dynamic range and a 6-bit TDC to eliminate the background to have an effect on the trigger. Following this major upgrade, the Hadron Forward Calorimeters will be commissioned for operation readiness in 2017. Here we describe the details and the components of the upgrade, and discuss the operational experience and results obtained during the upgrade and commissioning.
        Speaker: Burak Bilki (U)
        Slides
      • 2:18 PM
        Calibration and Performance of the ATLAS Tile Calorimeter during the run 2 of the LHC 18m
        The Tile Calorimeter (TileCal) is a hadronic calorimeter covering the central region of the ATLAS experiment at the LHC. It is a non-compensating sampling calorimeter comprised of steel and scintillating plastic tiles which are read-out by photomultiplier tubes (PMTs). The TileCal is regularly monitored and calibrated by several different calibration systems: a Cs radioactive source that illuminates the scintillating tiles directly, a laser light system to directly test the PMT response, and a charge injection system (CIS) for the front-end electronics. These calibrations systems, in conjunction with data collected during proton-proton collisions, provide extensive monitoring of the instrument and a means for equalizing the calorimeter response at each stage of the signal propagation. The performance of the calorimeter and its calibration has been established with cosmic ray muons and the large sample of the proton-proton collisions to study the energy response at the electromagnetic scale, probe of the hadronic response and verify the calorimeter time resolution. This contribution presents a description of the different TileCal calibration systems with the latest results on their performance and the results on the calorimeter operation and performance during the LHC Run 2.
        Speaker: Dr Oleg Solovyanov (V)
        Slides
      • 2:36 PM
        Performance of the CMS electromagnetic calorimeter during the LHC Run II 18m
        Many physics analyses using the Compact Muon Solenoid (CMS) detector at the LHC require accurate, high resolution electron and photon energy measurements. Particularly important are decays of the Higgs boson resulting in electromagnetic particles in the final state, as well as searches for very high mass resonances decaying to energetic photons or electrons. Following the excellent performance achieved in Run I at center of mass energies of 7 and 8 TeV, the CMS electromagnetic calorimeter (ECAL) is operating at the LHC with proton-proton collisions at 13 TeV center-of-mass energy. The instantaneous luminosity delivered by the LHC during Run II has achieved unprecedented values, using 25 ns bunch spacing. The average number of concurrent proton-proton collisions per bunch-crossing (pileup) has reached up to 40 interactions in 2016 and may increase further in 2017. These high pileup levels necessitate a retuning of the ECAL readout and trigger thresholds and reconstruction algorithms, to maintain the best possible performance in these more challenging conditions. The energy response of the detector must be precisely calibrated and monitored to achieve and maintain the excellent performance obtained in Run I in terms of energy scale and resolution. A dedicated calibration of each detector channel is performed with physics events exploiting electrons from W and Z boson decays, photons from pi0/eta decays and from the azimuthally symmetric energy distribution of minimum bias events.
        Speaker: Chia-Ming Kuo (National Central University (on behalf of the CMS Collaboration))
        Slides
      • 2:54 PM
        The Development and Performance of a 3D Imaging Calorimeter of DAMPE 18m
        The Dark Matter Particle Explorer (DAMPE) satellite has been operating in space for more than one year, and considerable science data have already been obtained. The BGO Electromagnetic Calorimeter (BGO ECAL) of the DAMPE is a total absorption calorimeter that allows for a precise three-dimensional imaging of the shower shape. It provides a good energy resolution (<1%@200GeV) and high electron/hadron discrimination (>105). An Engineering qualified model was built and tested using the cosmic rays and high energy beams with energy ranging from 1 GeV to 250GeV. The status of BGO calorimeter in space will also be presented.
        Speaker: Yunlong Zhang (University of Science and Technology of China)
        Slides
      • 3:12 PM
        The Semi-Digital Hadronic Calorimeter for Future Leptonic Collider experiments 18m
        The successful running of the technological prototype of the Semi-Digital Hadronic CALorimter (SDHCAL) proposed to equip the future ILD detector of the ILC has provided excellent results in terms of energy linearity and resolution and also tracking capabilities. Stability with time of the prototype is also successfully tested. To validate completely the SDHCAL option for ILD, a new R&D activities have started. The aim of such activities is to demonstrate the ability to build large detectors (> 2m2). The construction of efficient detectors of such a size necessitates additional efforts to ensure the homogeneity and the efficiency of these large detectors. An important aspect of the new activities is to use a new version of the HARDROC ASIC. The new version has several advantages with respect to the one used in the SDHCAL prototype such as the zero suppression and the I2C protocol. Another development is the DAQ electronic board. A new one is proposed. In addition to a reduced size to cope with the ILD requirements, new features are being implemented. A TCP/IP protocol is adopted in the new card to ensure the coherency of the data transmission. The TTC protocol is also to be used to distribute the clock to the different ASIC on the electronic board. The new DAQ board is being conceived to have the capability to address up to 432 ASICs of 64 channels each. Designs for both the DAQ board and the electronic boards are being finalized and the first boards will be produced soon while 600 of the new HARDROC were produced and tested. A new cassette, to host the active layer while being as before a part of the absorber, is being also conceived. The challenge is to maintain a good rigidity to ensure the perfect contact between the electronic board and the GRPC and also to facilitate the dissipation of the ASIC heating. Finally, the mechanical structure of the new prototype will use a new welding technique to reduce the dead zones and provide less deformed structure. Few attempts using the electron beam welding technique to build small setup have been realized at CERN.
        Speaker: imad laktineh (IPNL)
        Slides
    • 2:00 PM 3:30 PM
      R2-Experimental detector systems(5) Room 305C

      Room 305C

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Prof. Jin Li (IHEP/THU) , Prof. Wang Yi (Tsinghua University)
      • 2:00 PM
        The Belle II / SuperKEKB Commissioning Detector - Results from the First Commissioning Phase 18m
        The SuperKEKB energy-asymmetric e+e- collider has now started commissioning and is working towards its design luminosity of 8x10^35cm-2s-1. In spring 2016, SuperKEKB circulated beams in both rings during the first phase of commissioning, with the Belle II detector at the roll-out position. A dedicated array of sensors collectively called BEAST II was installed around the SuperKEKB interaction point to monitor and study beam background conditions. These measurements determine particle loss rates contributing to the beam life time, expected dose rates and thus possible effects on the survival time of the inner detectors, and both beam and physics background-induced particle rates, which impact detector operation and physics analysis. We will discuss the BEAST II setup, consisting of a total of seven different detector systems, each specialized for the measurement of different aspects of the beam background. We will present results on beam background for different accelerator conditions and studies of the injection background originating from the continuous “top up” injection of SuperKEKB. An outlook for the second phase of the commissioning, where data will be taken with the Belle II detector with a modified inner detector system specialized for background measurements, partially derived from the first phase of BEAST II, will also be given.
        Speaker: Dr Gabriel Miroslav (Max-Planck-Institute for Physics)
        Slides
      • 2:18 PM
        Integration and characterization of the vertex detector in SuperKEKB commissioning Phase 2 18m
        As an upgrade of asymmetric e+e- collider KEKB, SuperKEKB aims to increase the peaking luminosity by a factor of 40 to 8*10^{35}cm^{-2}s^{-1}. The SuperKEKB commissioning is achieved in 3 phases. The Phase 1 was successfully finished in June.2016. Now the commissioning is working towards the Phase 2 targeting to reach the luminosity of 1*10^{34}cm^{-2}s^{-1}. In Phase 2, the beam induced background versus luminosity and beam current will be investigated, to ensure a radiation safe operation environment for the Belle II vertex detector during the Physics data taking in Phase 3. The final focusing magnets will be installed and partial Belle II detector will be rolled in. Closed to the beam pipe, 2 pixel and 4 double-sided strip detector layers will be installed, together with the dedicated radiation monitors, FANGS, CLAWS and PLUME, which aims at investigating the backgrounds near the interacting point. The Phase 2 vertex detector integration was practiced and the combined beam test was accomplished at DESY. In this talk, the status of the vertex detector and the beam tests results are presented.
        Speaker: Dr Hua Ye (DESY)
        Slides
      • 2:36 PM
        The SHiP experiment at CERN 18m
        SHIP is a new general purpose fixed target facility, whose Technical Proposal has been recently reviewed by the CERN SPS Committee and by the CERN Research Board. The two boards recommended that the experiment proceeds further to a Comprehensive Design phase in the context of the new CERN Working group "Physics Beyond Colliders", aiming at presenting a CERN strategy for the European Strategy meeting of 2019. In its initial phase, the 400GeV proton beam extracted from the SPS will be dumped on a heavy target with the aim of integrating 2×10^20 pot in 5 years. A dedicated detector, based on a 30m long and 5x10m wide vacuum tank followed by a spectrometer and particle identification detectors, will allow probing a variety of models with light long-lived exotic particles and masses below O(10) GeV /c2. Another dedicated detector will allow the study of neutrino cross-sections and angular distributions. and tau neutrino deep inelastic scattering cross sections and is based on the OPERA emulsion brick technology. The talk will focus on the detector design and on beam test results that are being carried out
        Speaker: Murat Ali Guler
        Slides
      • 2:54 PM
        Discussion time 36m
    • 2:00 PM 3:30 PM
      R3-Front-end electronics and fast data transmission(3) Room 305E

      Room 305E

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: christophe de La Taille (OMEGA) , Dr qiang wang (ihep)
      • 2:00 PM
        The Global Control Unit for the JUNO front-end electronics 18m
        At the core of the Jiangmen Underground Neutrino Observatory (JUNO) front-end and readout electronics is the Global Control Unit (GCU), a custom and low power hardware platform with glue logic on board which is able to perform several different tasks spanning from selective readout and transmission as well as remote peripherals control. The hardware inaccessibility after installation, the timing resolution and synchronization among channels, the trigger generation and data buffering, the supernova events data storage, the data readout bandwidth requirements are all key factors that are reflected in the GCU architecture. The main logic of the GCU is in an FPGA that interfaces with a custom made ASIC that continuously digitizes the signal from the photomultiplier tube (PMT). The proposed paper introduces a detailed overview of the main GCU functionalities and then focuses on the prototypes validation and the first traces readout from a PMT.
        Speaker: Dr Davide Pedretti (University of Padova - INFN Laboratori Nazionali di Legnaro)
        Slides
      • 2:18 PM
        Design of a Data Acquisition Module Based on PXI for Waveform Digitization 18m
        The waveform digitization is more and more popular for readout electronics in the particle and nuclear physics experiment. A data acquisition module for waveform digitization is investigated in this paper. The module is designed on a 3U PXI (PCI eXtensions for Instrumentation) shelf, which can manage the measurement of two channels of waveform digitization for detector signals. It is equipped with a two channels ADC (Analog to Digital Converter) of 12 bits resolution and up to 1.8G samples per second sampling rate, and an FPGA (Filed Programming Gate Array) for controlling and data buffering. Meanwhile, a CPLD is employed to implement the PXI interface communication via PXI Bus. The electronics performance of this system was tested. The bandwidth of the system is more than 450MHz. The ENOB (Effective Number Of Bits) is up to 9.31 bits for an input signal from 5 MHz to 150 MHz and the ENOB is still above 8.17 bits for an input up to 400 MHz. The results show that the module can be successfully used in the particle and nuclear physics experiment.
        Speaker: Dr Zhe Cao (State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China)
        Slides
      • 2:36 PM
        A compact size, 64-channel, 80 MSPS, 14-bit dynamic range ADC module for the PANDA Electromagnetic Calorimeter 18m
        A compact size, 64-channel, 80 MSPS, 14-bit dynamic range ADC modules for the scintillating electromagnetic calorimeter of PANDA were developed and used for testing in various detector readout set-ups [1]. To minimize cabling bulk, the modules are planned to be placed inside of the PANDA detector volume, where they will be exposed to magnetic field of 2T and a non-negligible radiation flux. The module performs signal filtration, extracts important signal parameters and allows for resolving and parametrizing overlapping pulses. A dual FPGA structure and a hardwired arbitration circuit allows for resolving potentially catastrophic situations caused by radiation-induced (SEU) configuration damages. The FPGAs are prepared for self-detection and recovery from SEU. Processed data are pushed to the optical link running at 2 Gbit/s. The ADC module is compliant with a “Synchronization Of Data Acquisition” (SODA) System, which allows for obtaining defined latencies with a reference time accuracy of 50 ps [2]. The paper describes construction details and test environments. The results of performance test, including dynamic range, linearity, magnetic field and preliminary radiation sustainability are also presented.
        Speaker: Dr Pawel Marciniewski (Uppsala University)
        Slides
      • 2:54 PM
        Development of CaRIBOu: a modular readout system for pixel sensor R&D 18m
        The ATLAS experiment is planning to build and install a new all-silicon Inner Tracker (ITk) for the High-Luminosity LHC (HL-LHC) upgrade. Extensive R&D on pixel sensors based on High-Voltage CMOS (HV-CMOS) process is ongoing. Given the potential advantages of this technology compared with the traditional planar pixel sensors, several prototypes with different pixel type have been designed and fabricated in the 180nm and 350nm HV-CMOS processes provided by Austria Microsystems (ams). CaRIBOu (Control and Readout Itk BOard) is a modular readout system developed to test silicon-based pixel sensors. It currently includes several different front-end chip boards with compatible interface for pixel sensor mounting, a CaR (Control and Readout) board to provide power, bias, configurational signals and calibration pulse for sensors under test, a Xilinx ZC706 development board for data and command routing, and a host computer for data storage and command distribution. A software program has been developed in Python to control the CaRIBOu system and implement the tuning algorithm for different pixel sensors. CaRIBOu has been used in various testbeam at CERN and Fermilab for the HV-CMOS sensors fabricated in the ams HV-CMOS 180nm and 350nm processes since the end of 2015. We successfully integrated the ATLAS FELIX (Front-End LInk eXchange) DAQ system into CaRIBOu by using a FELIX PCIe card for the testbeam data readout, slow control and clock distribution through two GBT optical links instead of the standard Gigabit Ethernet interface of CaRIBOu. The testbeam results have demonstrated that the CaRIBOu readout system is very versatile for the test of different pixel sensors, and works very well with the FELIX DAQ system. Further development is ongoing to adapt it to different pixel sensors (e.g. MIMOSA and CLICpix), to implement multi-channel readout, and to make it available to various lab test stands.
        Speaker: Mr Hongbin Liu (University of Science and Technology of China)
        Slides
      • 3:12 PM
        Study of Radiation-induced Soft-errors in FPGAs for Applications at High-luminosity e+e- Colliders 18m
        Static RAM-based Field Programmable Gate Arrays (SRAM-based FPGAs) [1, 2] are widely adopted in Trigger and Data Acquisition (TDAQ) systems of High-Energy Physics (HEP) experiments for implementing fast logic due to their re-configurability, large real-time processing capabilities and embedded high-speed serial IOs. However, these devices are sensitive to radiation effects such as single event upsets (SEUs) or multiple bit upsets (MBUs) in the configuration memory, which may alter the functionality of the implemented circuit. Therefore, they are normally employed only in off-detector regions, where no radiation is present. Special families of SRAM-based FPGAs (e.g. the Xilinx Virtex-5QV) have been designed for applications in radiation environments, but their excessive cost (few 10k USD), with respect to their standard counterpart ($\sim$ 500 USD), usually forbids their usage in many applications, including HEP. Therefore, there is a strong interest in finding solutions for enabling the usage of standard SRAM-based FPGAs also on-detector. Methods based on modular redundancy and periodic refresh of the configuration, i.e. configuration scrubbing, are used in order to mitigate single event effects, which become more significant as the technological scaling proceeds towards smaller feature sizes. In fact, latest devices also include dedicated circuitry implementing error correcting codes for mitigating configuration errors. The expected bit configuration upset rate is valuable information for choosing which protection strategy, or which mixture of strategies, to adopt. Typically, test campaigns are carried out at dedicated irradiation facilities by means of heavy ions, proton and neutron beams [3,4,5] and they permit to determine the particle to bit error cross section. However, a reliable prediction of the upset rate, and of radiation effects in general, requires the knowledge of the cross section as function of the particle species and their spectra and it depends on a detailed knowledge of the radiation fluxes. Often such information is not available with sufficient precision, and when possible an in situ (or in flight for space applications) measurement of the upset rate is highly recommended. For instance, experiments at the Large Hadron Collider have been monitoring SEUs in readout control FPGAs [6], experiments in space have been launched in order to measure single event effects rates and compare them to predictions based on cross sections [7]. Furthermore, over the last decade, FPGA vendors have been carrying out experiments aimed at measuring SEUs induced by atmospheric neutrons in their devices [8]. In February 2016 the SuperKEKB [9] $e^+e^-$ high-luminosity ($8\cdot10^{35} cm^{-2} s^-1$) collider of the KEK laboratory (Tsukuba, Japan) has been commissioned and it has been operated until June 2016 completing the so-called Phase-1. In this work, we present direct measurements of radiation-induced soft-errors in a SRAM-based FPGA device installed at a distance of $\sim$ 1 m from the SuperKEKB beam pipe. We designed a dedicated test board hosting a Xilinx Kintex-7 FPGA. In order to distinguish between FPGA failures from those of other devices, our board hosts only passive components other than the device under test. Power and configuration are fed to the board over dedicated cabling from a remote control room. A single board computer manages configuration and read back via a JTAG connection. During the SuperKEKB operation, we continuously read back the FPGA configuration memory in order to spot single and multiple bit upsets (SBUs and MBUs) and we logged power consumption at the different power rails of the device. Since the operation current of the SuperKEKB collider spanned a range between 50 and 500 mA for both the electron and positron rings, the experimental scenario allowed us to perform measurements in different radiation conditions. We discuss the measured FPGA configuration error rate for both SBUs and MBUs and the power consumption variation in the view of applications in Belle2, but also taking into account other experiments operating in similar radiation conditions. Our study will continue in 2018 during the Phase-2 operation of the SuperKEKB collider, when the ring currents will increase and the final focusing magnets will be installed for providing $e^+e^-$ collisions. The background radiation is expected to rise as well as related effects in FPGAs. This work is part of the ROAL SIR project funded by the Italian Ministry of Research (MIUR). References [1] Xilinx Inc., “Virtex UltraScale FPGAs Data Sheet: DC and AC Switching Characteristics,” DS893 (v1.7.1) April 4, 2016 [2] Altera Corp., “Stratix 10 Device Overview,” S10-OVERVIEW, 2015.12.04 [3] D. M. Hiemstra and V. Kirischian, "Single Event Upset Characterization of the Kintex-7 Field Programmable Gate Array Using Proton Irradiation," 2014 IEEE Radiation Effects Data Workshop (REDW), Paris, 2014, pp. 1-4. doi: 10.1109/REDW.2014.7004593 [4] M.J. Wirthlin, H. Takai and A. Harding, “Soft error rate estimations of the Kintex-7 FPGA within the ATLAS Liquid Argon (LAr) Calorimeter ,” in Proc. of Topical Workshop on Electronics for Particle Physics 2013, Perugia, Italy [5] T. Higuchi, M. Nakao and E. Nakano, “Radiation tolerance of readout electronics for Belle II,” in Proc. of Topical Workshop on Electronics for Particle Physics 2011, Vienna, Austria [6] K. Røed, J. Alme, D. Fehlker, C. Lippmann and A. Rehman, “First measurement of single event upsets in the readout control FPGA of the ALICE TPC detector,” in Proc. of Topical Workshop on Electronics for Particle Physics 2011, Vienna, Austria [7] A. Samaras, A. Varotsou, N. Chatry, E. Lorfevre, F. Bezerra and R. Ecoffet, "CARMEN1 and CARMEN2 Experiment: Comparison between In-Flight Measured SEE Rates and Predictions," 2015 15th European Conference on Radiation and Its Effects on Components and Systems (RADECS), Moscow, 2015, pp. 1-6. doi: 10.1109/RADECS.2015.7365590 [8] Xilinx Inc., “Continuing Experiments of Atmospheric Neutron Effects on Deep Submicron Integrated Circuits,” WP286 (v2.0) March 22, 2016 [9] I. Adachi, “Status of Belle II and SuperKEKB,” Journal of Instrumentation, Volume 9, July 2014
        Speaker: Dr Giordano Raffaele (University of Naples and INFN)
        Slides
    • 2:00 PM 3:30 PM
      R4-Semiconductor detectors(6) Room 307

      Room 307

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: K.K. Gan (The Ohio State University) , Yasuo Arai (High Energy Accelerator Research Organization (KEK))
      • 2:00 PM
        An SOI pixel sensor with in-pixel binary counters 18m
        Results from an SOI pixel sensor with in-pixel binary counters are reported. It's been well known that the transition of output pattern within each counter would induce considerably large spurious signal on the nearby charge collection electrodes, which interferes with the detection of real signals. Among the various remedies investigated, Double-SOI process proved to be an effective cure thanks to the advancement in semi-conductor industry. The design concept of CPIXTEG3b, in particular the usage of the shiedling layer enabled by Double-SOI is covered in this talk. S-curve measurement reveals ENC around 60e- and sigma of threshold distribution less than 20 e-. The pixel array has demonstrated an excellent feature of zero noise with a low threshold around 800e-. The depletion of sensor and inefficiency at the square boundary of pixel have been studied using a synchrotron X-ray beam. The depletion depth reaches 130um under -100V bias. Charge sharing at the edge of two adjacent pixels can be corrected by properly setting the threshold, while at the corner where 4 pixels adjoin specific comparison logic is needed to cope with it. The success of CPIXTEG3b brings about a promising prospect for applications such as photon counting for the synchrotron light source and charged particle tracking for future e+e- collider.
        Speaker: Dr Yunpeng LU (Insitute of High Energy Physics, CAS)
        Slides
      • 2:18 PM
        Fine-Pixel Detector FPIX Realizing Sub-micron Spatial Resolution Developed Based on FD-SOI Technology 18m
        Monolithic pixel devices are attractive for various aspects in particle detector application. One of the notable features is that the pixel size can be reduced without constraints from the metal bumps which limit the pixel size of hybrid pixel devices typically to 50um. We are developing monolithic pixel devices utilizing Lapis 0.20 um FD-SOI (Fully-Depleted Silicon-on-Insulator) technology. FPIX, fine-pixel detector, has been designed to demonstrate the capability of the SOI monolithic pixel in view of excellent spatial resolution achievable. With consisting of eight on-pixel FETs, FPIX realized a pixel size of 8x8um in a 128x128 matrix, 1x1mm active area, in a chip size of 3 mm square. The signals are extracted in a rolling-shutter mode and digitized by external ADCs. There are eight parallel readout lines; therefore each ADC handles signals out of 16 columns of 128 rows. The 12-bit digitization requires 200 ns, corresponding to a frame readout time of 0.5 ms. FPIXs have been fabricated on various SOI handle wafer types, single SOIs in Cz and FZ, p- and n-types, also on double SOI (p type Cz). This redundancy is an outstanding feature that we can select the sensor type and resistivity best suited for application. Among them, double SOI has been developed for, among other reasons, radiation resistivity. The second active layer is used to compensate for the threshold shifts caused by holes trapped in the BOX (buried oxide) layer due to radiation. We have evaluated the tracking performance of a system consisting of four single SOI FPIX devices of FZ p-type (25kOhmcm, 500um thickness) in a 120 GeV hadron beam at Fermilab. A double SOI FPIX (1kOhmcm, 300um thickness) irradiated to 100 kGy has also been tested for the performance. We calculated the residual distribution of hit position to the track reconstructed from other three. The residual distribution is well fitted by a Gaussian function with a standard deviation of 0.87um. Taking into account the uncertainty in the track position, we are confident that sub-micron spatial resolution has be achieved by FPIX. We have also observed a signal out of 100kGy irradiated FPIX corresponding to the MIP particles. We report the detail of the FPIX design and the performance evaluation.
        Speaker: Kazuhiko Hara (University of Tsukuba)
        Slides
      • 2:36 PM
        A monolithic pixel sensor with fine space-time resolution based on Silicon-on-Insulator technology for the ILC vertex detector 18m
        Silicon-on-insulator (SOI) wafer technology can be used to achieve a monolithic pixel detector, in which both a semiconductor pixel sensor and readout electronics are integrated in the same wafer. We are developing an SOI pixel sensor SOFIST, SOI sensor for Fine measurement of Space and Time, optimized for the vertex detector system of the International Linear Collider (ILC) experiment. This sensor has a pixel size of 20$\times$20 um$^2$ with fine position resolution for identifying the decay veteces of short life-time particles. The pixel circuit stores both the signal charge and timing information of the incident particles. The sensor can separate hit events with recording timing information during bunch-train collisions of the ILC beam. Each pixel has multiple stages of analog memories and time-stamp circuits for accumulating multiple hit events. SOFIST Ver.1, the first prototype sensor chip, was fabricated using 0.2 $\mu$m SOI process of LAPIS Semiconductor. The prototype chip consists of 50$\times$50 pixels and Column-ADC circuits in a chip size of 3x3 mm$^2$. We have designed the pixel circuit for the charge signal read out with a pre-amplifier circuit and 2 analog memories. We measured the sensor position resolution with 120 GeV Proton beam at Fermilab Test Beam Facility in January 2017. We observed the position resolution of 3 $\mu$m, which is required as a pixel sensor for ILC vertex detector. In 2016, we have submitted SOFIST Ver.2, which measures the hit timing information. We are designing SOFIST Ver.3 storing both the signal charge and timing information within a pixel area of 20$\times$20 $\mu$m$^2$. We adopt 3D stacking technology which implements additional circuit layer on the SOI sensor chip. The additional layers are connected electrically by advanced micro-bump technology, which can place bump with the pitch of 5 $\mu$m. In this presentation, we report the status of the development and the evaluation of the SOFIST prototype sensor.
        Speaker: Shun Ono (KEK)
        Slides
      • 2:54 PM
        Secondary electron yield of nano-thick aluminum oxide and its application on MCP detector 18m
        The secondary electron properties of nano-thick aluminum oxide have been studied. The MCP assembly performance improvement through coating aluminum oxide is investigated. The gain, the charge resolution and the peak-to-valley ratio of the MCP detector are improved. Two possible solutions are proposed to improve the maximum yield with reduced optimal energy of secondary electron emission materials.
        Speaker: Dr Yan Baojun (IHEP)
        Slides
      • 3:12 PM
        Signal to noise ratio of Low Gain Avalanche Detector 18m
        Low gain avalanche detectors (LGAD) were attracted considerable attention as a new concept of silicon radiation detectors. These devices are based on reach‐through avalanche photodiodes and provide a moderate gain (gain~10). Compared with general avalanche photodiodes (APD), LGAD have a remarkable improvement of the signal-to-noise ratio (SNR) which makes them more suitable to detect high energy charged particles. Moreover, LGAD have good time resolution so that they can be used as sensors for tracking. In this paper, the SNR of LGAD was proved to be better than APD and PIN by theoretical methods. Our LGAD were measured. The punch-through voltage is 45V and the breakdown voltage is 65V. The gain is almost not changed with the biased voltage and temperature under the breakdown voltage. The SNR reaches the maximum 320 while the bias voltage is 64V and the gain is 4.
        Speaker: Prof. Guangqing Yan (Beijing Normal University)
    • 3:30 PM 4:30 PM
      POSTER & Break 1h Corridor on the third floor

      Corridor on the third floor

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
    • 4:30 PM 6:00 PM
      Discussion Meeting Room305A

      Room305A

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
    • 4:30 PM 6:00 PM
      R2-Gaseous detectors(4) Room 305C

      Room 305C

      Beijing International Convention Center

      No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
      Conveners: Hugo Delannoy (Interuniversity Institute for High Energies (ULB-VUB)) , Dr Jianbei Liu (University of Science and Technology of China)
      • 4:30 PM
        Performance of Resistive Plate Chamber operated with new environmental friendly gas mixtures 18m
        The Resistive Plate Chamber (RPC) detectors are widely used thanks to their excellent time resolution and low production cost. At the CERN LHC experiments, the large RPC systems are operated in avalanche mode thanks to a Freon based gas mixture containing C2H2F4, SF6 and iC4H10. Unfortunately C2H2F4 and SF6 are considered greenhouse gases with high impact on the environment. Furthermore the C2H2F4 is also subject to European regulations aiming in a gradual phase out from production in the near future that could induce instability on the price and incertitude in the product availability. The search of new environmental friendly gas mixtures is therefore advisable for reducing GHG emissions and costs as well as to optimize RPC performance and possible aging issues. Several hydrofluorocarbons (HFCs) and hydrofluoroolefins (HFOs) with a global warming potential (GWP) lower than the C2H2F4 have been studied as possible replacement. More than 60 new environmental friendly gas mixtures based on these gases with the addition of inert components have been tested on single-gap RPCs by measuring the detector performance in terms of efficiency, streamer probability, induced charge, cluster size and time resolution. Evaluations of the quenching and electronegative capacities of the selected eco-friendly gas candidates have been deduced by comparison of the RPC performance. A particular attention has been addressed to the possibility of maintaining the current LHC RPC operation conditions (i.e. currently used applied voltage and front-end electronics) in order to be able to use new gas mixtures for RPC systems even when the common infrastructure (i.e. high voltage and detector components) cannot be replaced. A complete replacement of C2H2F4 with the HFOs does not give satisfactory results using the current LHC detector front-end electronics and high voltage system. However reasonable avalanche operation is achievable with some of the low GWP HFCs tested. It has been observed that methane (C) and ethane (C2) molecular structures allow direct operation at applied high voltage similar to the ones currently used at the LHC experiments. On the contrary propane or propene structures (C3 without or with double bounds) require the addition of Argon or Helium. Unfortunately mixtures with Argon and Helium show the presence of a large fraction of streamers well above the tolerable limit for safe and long-term operation at the LHC experiments. Encouraging results have been obtained with a partial (50%) substitution of the C2H2F4 with HFO and the addition of small Helium quantity or by using HFCs based gas mixtures. The nowadays RPC gas mixture is therefore not easily substitutable with another 3 gas mixture components but encouraging results have been obtained with a 4-6 gas mixture components. In case of no constrains with the RPC design and infrastructure, operation in avalanche mode with a HFO based gas mixture can be obtained at higher electric field and with a dedicated electronics.
        Speaker: Beatrice Mandelli (CERN)
        Slides
      • 4:48 PM
        High tracking performance in 3D with gaseous pixel detectors based on the Timepix3 chip. 18m
        Our group is developing gaseous pixel detectors by using micromegas-based amplification structures on top of CMOS pixel readout chips of the Medipix family. By means of wafer post-processing techniques we add a spark-protection layer and a grid to create the amplification region above the chip. An inserted gas layer and cathode plane above the grid create a complete gaseous detector able to reconstruct 3D track segments due to the TDC per pixel topology which enables the recording of the drift time. By fitting the track segments, we obtain the resolutions for the position and angle. Using a small scale prototype of the Timepix3 chip, we have demonstrated high tracking performance in [1]. However, the resolution along the drift direction is dominated by timewalk. The existing Timepix3 chip, thanks to the simultaneous measurement of the time-of-arrival (ToA) and charge via time-over-threshold (ToT) allows corrections to remaining timewalk effects, improving further the resolution. We have developed a gaseous pixel detector based on the Timepix3 chip. The detector was used SPS/Cern in order to measure the tracking performance. I will report on the timewalk correction obtained with real data from a particle beam. The results obtained make this detector the most precise gaseous detector to date for measuring the creation position of individual ionisation electrons. **References** [1] S. Tsigaridas, et al., Precision tracking with a single gaseous pixel detector, Nucl. Instr. and Meth. A 795 (2015) 309-317.
        Speaker: Stergios Tsigaridas (Nikhef)
        Slides
      • 5:06 PM
        GridPix detector with Timepix3 ASIC 18m
        GridPix detectors combine the advantages of a high granularity readout based on a pixel ASIC with a Micromegas gas amplification stage. By producing the Micromegas with photolithographic postprocessing techniques directly on the ASIC a very good alignment of grid holes with readout pixels can be reached. Thus, the charge avalanche started by a single primary electron can be collected and digitized by a single pixel giving excellent spatial resolution. Also, the energy resolution improves because of the primary electron counting instead of charge summation. After demonstrating the