Conveners
Parallel Session V：Particle Detector Technology
- 月昆 衡 (高能所)
Parallel Session V：Particle Detector Technology
- qian yue (Tsinghua Univerisity)
Parallel Session V：Particle Detector Technology
- Jianbei Liu (University of Science and Technology of China)
Parallel Session V：Particle Detector Technology
- chengguang zhu (Shandong Univ)
Parallel Session V：Particle Detector Technology
- Qun OUYANG (IHEP)
Parallel Session V：Particle Detector Technology
- 树彬 刘 (University of Science and Technology of China)
Parallel Session V：Particle Detector Technology
- Yangheng Zheng (University of Chinese Academy of Sciences)
Parallel Session V：Particle Detector Technology
- Yong Yang (Shanghai Jiao Tong University)
Dr
滨龙 王
(UCAS)
16/08/2021, 14:00
5. 粒子物理实验技术
Oral report
The under exploring Super tau-Charm facility (STCF) project, which is an electron-position operating at the center-of-mass 2~7 GeV, is a natural extension of the Beijing Spectrometer (BESIII) and will play crucial role in the high density frontier of elementary particle physics field worldwide. The PID detector in STCF located between the tracking detector, main drift chamber and the EMC,...
Mr
希磊 孙
(IHEP)
16/08/2021, 14:20
5. 粒子物理实验技术
Oral report
The discovery of gravitational waves and their gamma bursts has opened the era of multi messenger astronomy. China's Gravitational wave high energy Electromagnetic Counterpart All-sky Monitor (GECAM) uses two small satellites to monitor gamma-ray bursts in an all-sky field of view. It has a quasi-real-time gamma burst broadcast capability and will play an important role in the location of...
Dr
Binbin Yan
(postdoctor)
16/08/2021, 14:35
5. 粒子物理实验技术
Oral report
I'll present a systematic determination of the responses of PandaX-II, a dual phase xenon time projection chamber detector, to low energy recoils. The electron recoil (ER) and nuclear recoil (NR) responses are calibrated, respectively, with injected tritiated methane or $^{220}$Rn source, and with $^{241}$Am-Be neutron source, in an energy
range from 1-25 keV (ER) and 4-80 keV (NR), under the...
Dr
Ma lishuang
(IHEP)
16/08/2021, 14:50
5. 粒子物理实验技术
Oral report
快时间探测器因其超快的时间分辨和位置分辨广泛应用于高能物理，核医学检测，生物检测等领域。如在LHCb升级计划中提出的TORCH探测器要求其其探测器时间分辨小于70ps；CEPC中提出的晶体量能器方案要求其时间分辨<100ps；随着医疗影响技术的发展TOF-PET也提出了10ps符合时间分辨（FWHM）的目标，此外也有很多高能物理领域和成像领域对快时间位敏型光电倍增管有很大的需求。在成功研制出20英寸光电倍增管后，结合国际国内应用需求，微通道板型光电倍增管合作组继续展开了位置灵敏型快时间光电倍增管的研制。在攻克各项技术难题后，已成功研制出快时间位敏型光电倍增管，本报告将针对快时间位敏型光电倍增管的研发需求、研发历程、快时间测试方法、研究现状等几个方面进行介绍。
Yazhou Niu
(USTC)
16/08/2021, 15:20
5. 粒子物理实验技术
Oral report
A highly granular electromagnetic calorimeter prototype has been designed with particle flow algorithms within the CALICE collaboration for precision measurements of Higgs and electroweak physics at future lepton collider experiments, including the Circular Electron Positron Collider (CEPC). Scintillator strips and silicon photomultipliers (SiPMs) are instrumented as sensitive layers and...
Dr
Zhou Wang
(Shanghai Jiao Tong University)
16/08/2021, 15:35
5. 粒子物理实验技术
Oral report
PandaX实验是我国首个大型液氙暗物质探测实验，针对如何降低暗物质探测器的探测介质液氙中放射性氪-85含量，从而获得高纯度氙的问题，研制出一种将氪从氙中提取出来以获得超高纯度氙气的高效低温精馏系统。该精馏系统中的主要结构精馏塔采用填料塔形式，塔高6m，直径125mm，其中对于精馏段4m，提馏段2m。氪气相精馏回流比为145，液相精馏回流比为45。根据设计，该精馏系统可以在回收率为99%的情况下，以10kg/h（30SLPM）的速率将氙中氪的含量从5X10(-7) mol/mol（0.5ppm）降至低于10(-14)...
Mr
任明杰 李
(四川大学)
16/08/2021, 15:50
5. 粒子物理实验技术
Oral report
中国暗物质实验（CDEX）合作组计划在锦屏地下室二期开展百公斤量级的暗物质以及中微子实验探测，届时高纯锗阵列探测器将直接浸泡在约1700立方米大型液氮低温系统中。
液氮中的氡是可能的重要本底来源之一。本报告将汇报以下进展：1. 液闪级联探测器测量液氮中的氡含量；2. 低氡下的富集系统的研制；3. 低温下材料氡吸收以及氡迁移的研究。
Dr
Li Zhao
(Shanghai JiaoTong University)
16/08/2021, 16:10
5. 粒子物理实验技术
Oral report
PandaX-4T, the new generation of the PandaX detector, is a xenon dual-phase detector with about six tons of liquid xenon as target for dark matter search. A cryogenics and xenon handling system is designed to liquify and purify this large detector. In this report, the results on the commission of the cryogenics and gas handling system are reported. The maximum cooling power of ~ 580 W at 178 K...
震宇 张
(清华大学)
16/08/2021, 16:30
5. 粒子物理实验技术
Oral report
液氩反符合技术是压低高纯锗稀有事例探测实验本底的有效方法，国际上基于高纯锗的低本底实验如GERDA应用液氩反符合技术已经取得了非常好的效果。CDEX实验在开拓液氮作为屏蔽体的直冷介质技术路线的同时，也在积极开展液氩反符合技术的研究。目前正在开展的三百公斤级富集76Ge的高纯锗阵列实验（CDEX-300ν）计划采用液氩反符合技术压低本底。本报告将讨论液氩光学系统的模拟方面的最新进展、液氩光学系统的初步设计，以及光收集与读出性能的初步模拟结果等。主要内容包括：（1）不同读出方式（光纤与光导）的光传输性能；（2）探测器系统在闪烁体中的能量沉积地图；（3）探测器系统结合不同光读出结构的实际反符合性能与极限反符合性能，为后续反符合系统的细化设计与性能优化提供依据。
Mr
anshun zhou
(USTC)
16/08/2021, 16:45
5. 粒子物理实验技术
Oral report
To acquire the feature of Higgs particle, construction of Circular Electron Positron Collider (CEPC) was proposed in recent years. Electromagnetic calorimeter based on scintillator and SiPM (ScECAL) is one of the options of the electromagnetic calorimeter system of CEPC. ScECAL Electronic prototype was constructed to verify the feasibility. Special readout electronics system was built to meet...
Mr
Keqing Zhao
(ustc)
16/08/2021, 17:00
5. 粒子物理实验技术
Oral report
To meet the signal readout requirements of the ton-level prototype based on liquid argon（Lar）detector for the direct detection of dark matter, this report has designed a high-speed waveform digital readout electronics system based on the PXIe technology platform. The system uses multiple waveforms digitizing modules and a clock trigger module, which has good flexibility and scalability. For a...
来富 罗
(University of Science and Technology of China)
16/08/2021, 17:15
5. 粒子物理实验技术
Oral report
Super Tau-Charm Facility (STCF) is one of important options for accelerator-based particle physics after Beijing Electron-Positron Collider (BEPC-II) in China, which aims at ultra-precise measurement and new physics search in tau-charm energy region with about 100 times higher luminosity. The electromagnetic calorimeter (ECAL), as an important part of the spectrometer, needs to meet the demand...
HAN Yubo
(IHEP)
, Dr
Hongbo ZHU
(IHEP)
16/08/2021, 17:30
5. 粒子物理实验技术
Oral report
硅探测器因具备优异的位置与能量分辨，时间响应以及抗辐照性能等特点被广泛应用于带电粒子的探测中，尤其是对撞机实验中的顶点探测器以及径迹探测器中。针对其各方面性能的研究工作已广泛开展，为了满足更高抗辐照性能的需求，芯片更倾向于使用更薄的厚度，如ATLICE ITS 的内层单片式硅探测器为50 微米厚。更薄的探测器同时也意味着更少的电荷收集，更小的信号，以及更高增益的放大电路。因此需要低能（小于6...
Mr
祥祥 任
(山东大学)
16/08/2021, 17:45
5. 粒子物理实验技术
Oral report
PandaX(Particle and Astrophysical Xenon Experiments)实验以暗物质和中微子探测为主要物理目标，探测器采用流行的“二相型氙”技术, 来测量可能的暗物质候选者或者中微子与氙原子核发生弹性碰撞所留下的微弱信号。其中最新的PandaX-4T探测器，具有4吨的有效探测质量，其读出方式仍然采用光电倍增管配合商业波形采样插件的形式来实现。
在本报告中，报告人将系统的阐述PandaX-4T实验电子学在PandaX-II实验电子学基础上的改进和升级，包括引入无触发运行模式、升级读出通道数、升级信号采样率和采样带宽，以及改善DAQ软件框架。同时本报告中，报告人还将汇报基于分布式实时数据收集方法的PandaX-4T触发系统的相关进展。
Dr
坤 胡
(山东大学)
17/08/2021, 08:30
5. 粒子物理实验技术
Oral report
当今粒子探测器正朝着高定位精度、高通道密度的方向发展，这对前端读出电子学系统提出了更高的要求。本报告将介绍一种基于放大器的电荷测量技术，避开了ＡＳＩＣ设计周期长、复杂度高等的缺点，适应新型粒子探测器的快速研发。这种电荷测量方案，不像传统积分滤波（ＱＡＣ）＋模数变换（ＡＤＣ）的测量方案，而是直接对电荷进行数字化（ＱＤＣ）。此种电路结构简单，利用ＦＰＧＡ的多输入输出管脚Ｉ／Ｏ的优势，可实现上百通道的电荷测量。这套系统分上、下两层板设计，采用交叠结构，以此减小整个系统的尺寸。上层板包含模拟部分，如放大器，电容、电阻等；下层板主要包含ＦＰＧＡ的控制电路。我们测试了这种电路的噪声和线性，并结合数字SiPM的信号读出，对这种电路的多通道读出能力做了验证。
Yiming 一鸣 Li 李
(IHEP)
17/08/2021, 08:50
5. 粒子物理实验技术
Oral report
The Silicon Tracker covering large area is a key component of the tracking system for CEPC detector. One of the most promising technology options is the high voltage CMOS (HV-CMOS) for its high position resolution and cost-effectiveness. Tests and deveopment based on ATLASPix3, a HV-CMOS sensor will be introduced. The plan for a demonstrator stave and preliminary consideration for the system...
Mei Zhao
(高能所, IHEP)
17/08/2021, 09:05
5. 粒子物理实验技术
Oral report
Low- Gain Avalanche Detector (LGAD) with time resolution better than 50ps has been choose as the sensors for HGTD project and have so far been developed by several institutes. This talk will show measurement results of first version LGAD sensors designed by the Institute of High Energy Physics (IHEP) and fabricated by Institute of Micro Electronics (IME). Time resolution of IHEP-IMEv1 sensors...
Xiao Yang
(University of Science and Technology of China)
17/08/2021, 09:20
5. 粒子物理实验技术
Oral report
In this talk, the recent progress of the development of the Low-Gain Avalanche Detector (LGAD) at the USTC will be presented. The talk covers production and characterisation of the USTC LGADs . The LGADs, with its internal gain mechanism which can provide a signal with fast rising time, resulting in a time resolution of about 30 ps. The thin active layer reduces the Landau noise and makes it...
Mengzhao LI
(高能所)
17/08/2021, 09:35
5. 粒子物理实验技术
Oral report
The Low Gain Avalanche Diode (LGAD) is a high-precision time detection technology in high-energy experimental physics. There are two main two types LGAD for elector- positron collider: large-area LGAD (LA-LGAD) and AC-coupled LGAD (AC-LGAD). The large-area LGAD can greatly reduce the number of electronic readout channels and reduce experimental costs. AC-LGAD can reconstruct the particle...
昶达 何
(上海交通大学)
17/08/2021, 09:50
5. 粒子物理实验技术
Oral report
PandaX暗物质实验采用模数转换器来采集光电倍增管的波形信号。以前的PandaX-II实验采用了商用波形采样插件（100MS/s）。该采集卡可以全局外触发的方式采集一个完整的事例。但是在此触发模式下，暗物质探测灵敏度受到触发阈值的限制。因此正在运行的PandaX-4T实验采用另外一个型号的采样插件（250MS/s)，通过单通道自触发的方式采集数据，避免了外触发阈值的不利影响。但是，受插件缓存大小的限制，不能采集一个完整的事例，不利于实验的取数。
...
Dr
Jing Dong
(CAS-IHEP)
, Dr
Yunpeng LU
(Institute of High Energy Physics, CAS)
17/08/2021, 10:05
5. 粒子物理实验技术
Oral report
The experiment on the next generation of electron-positron collider as a Higgs factory should have to reach the unprecedented impact parameter resolution, for the purpose of efficient tagging of heavy flavor quarks and τ lepton. This sets stringent demands on silicon pixel sensors of the vertex system, which is around 3μm single point resolution for the inner most detector layer, with fast...
Dr
Yunpeng LU
(Institute of High Energy Physics, CAS)
17/08/2021, 10:40
5. 粒子物理实验技术
Oral report
CMOS像素芯片JadePix3是在CEPC预研项目框架下研发的高空间分辨率、低功耗的全功能像素探测器芯片。为了满足顶点探测器对b/c夸克和tau轻子进行flavor tagging的实验要求，该芯片以小像素为核心目标进行了设计优化，其最小像素尺寸为16 um*23 um，仅为国外同类芯片的像素面积的一半大小。如此小的像素尺寸，是通过对底层器件最小化来实现的，包括Sensing Diode，MOS电容，控制逻辑。同时，版图设计也推向了工艺允许的极限。这些设计上的选择能否确保芯片正常工作并取得预期的空间分辨率，需要通过实验测试来验证。
JadePix3芯片在设计上的独特之处还体现在采用了弱电流脉冲放大/甄别器和逐行扫描（Rolling...
Dr
志刚 王
(IHEP)
17/08/2021, 11:00
5. 粒子物理实验技术
Oral report
中国空间站高能宇宙辐射探测设施（HERD）项目是由我国科学家提出应用于我国未来空间站的大型科学研究项目，其物理目标包括暗物质寻找、宇宙线探测以及高低能伽玛射线研究。HERD探测器从内而外分为三维成像量能器CALO、光纤径迹仪FIT、塑闪探测器PSD、硅电荷探测器SCD和穿越辐射探测器TRD。三维成像量能器CALO是HERD的核心探测器，测量粒子能量并进行粒子鉴别，五面灵敏的创新设计确保了超大几何因子。它由7500块LYSO晶体组装成21层栅格模块。每块晶体的信号由4根波长转移光纤送至高、低量程增强相机和触发系统。量能器还配置了PD信号读出系统，实现能量信息的双测量。触发系统收集CALO和PSD的快信号完成有效触发。三维成像量能器是HERD的核心载荷，具备大几何因子，具有高分辨能量测量能力和高粒子鉴别能力。立足成为下一代的高能宇宙辐射探测设施，HERD创新性的选择了五面灵敏，具有三维成...
Dr
Yang ZHOU
(Institute of High Energy Physics, CAS)
17/08/2021, 11:15
5. 粒子物理实验技术
Oral report
建造下一代正负电子对撞机，对希格斯物理进行精密测量，以检验粒子物理标准模型并发现新物理是当前国际粒子物理学界的共识。而未来高亮度、高精度的正负电子对撞机实验，对用于高效鉴别重味夸克和Tau轻子、以及精确测量带电粒子动量的顶点探测器系统，在空间分辨、时间分辨、功耗、抗辐照能力等方面，提出了极高的综合性能要求。其中，高空间分辨要求的小像素尺寸和高时间分辨所需的像素内复杂的电子学功能，在实现上的矛盾，成为当前像素探测器研发的主要难点。
不同于当前主流的单片集成（Monolithic）探测器技术，我们提出了一种新的设计方案，将像素探测器芯片的模拟部分和数字部分分别设计流片，再通过TBV（Through Box Via）技术进行3D连接，从而在不增大像素尺寸的条件下，实现了复杂像素内数字逻辑功能的集成。
Ying Zhang
(IHEP)
17/08/2021, 11:30
5. 粒子物理实验技术
Oral report
高能环形正负电子对撞机（Circular Electron Positron Collider, CEPC）内层顶点探测器，对于重味夸克重建与分辨至关重要。为实现高精度的物理测量，对内层顶点探测器的物质量、空间分辨率、读出速度以及功耗等方面的性能提出了极严苛的要求。CMOS像素探测器（CMOS Pixel Sensor, CPS）技术在上述各性能方面具有很大的优势，是很有前景的候选探测器技术之一。自2015年起，CEPC顶点探测器研发团队开展了一系列的CMOS像素探测器芯片研发工作。
根据最新的对撞机设计方案和电子束本底的研究结果，顶点探测器内层的最高击中率预计高达 ~10^7/cm^2/s。为满足 CEPC 顶点探测器的最高击中率需求，研发团队开展一款名为TaichuPix的CMOS 像素探测器芯片的研发。采用180 nm CMOS 工艺，目前已经完成了两个小规模原型芯片(25...
Dr
Jie ZHANG
(Institute of High Energy Physics)
, Mr
Wei WEI
(高能所)
17/08/2021, 11:45
5. 粒子物理实验技术
Oral report
HEPS-BPIX2 is the second prototype of single-photon counting pixel detector with 1.4 million pixels developed for applications of synchrotron light sources. It follows the first prototype, HEPS-BPIX, with a pixel size of 150 µm x 150 µm and frame rate up to 1.2 kHz at 20-bit dynamic range. This paper contains a detailed description of HEPS-BPIX2 upgrade with a recently launched Through Silicon...
Prof.
Yi Wang
(THU)
17/08/2021, 14:00
5. 粒子物理实验技术
Oral report
“NICA/MPD实验新型电磁量能器关键技术合作研究”是中俄基于NICA加速器合作的重大项目，NICA是一台位于俄罗斯杜布纳联合核子研究所（JINR)正在设计建造中的重离子对撞加速器装置。 NICA/MPD的主要物理目标是产生并研究高重子密度下的一种新物质态以及寻找奇特粒子，包括强子态-夸克胶子等离子体相变、核物质相变临界点、夸克胶子强相互作用、强子化机制、以及宇宙大爆炸的初始状态和演变过程等。中方将在两年时间内为MPD实验研制出由8个扇区组成的电磁量能器样机。本文介绍了应用于MPD实验的Shashlyk型电磁量能器的组成结构，原型研发，束流实验结果，批量生产工艺流程及批量生产情况。
Dr
Sheng-Sen Sun
(Institute of High Energy Physics)
, Dr
Yong Liu
(Institute of High Energy Physics)
17/08/2021, 14:20
5. 粒子物理实验技术
Oral report
For future lepton collider experiments, a novel concept of 4D calorimetry based on scintillating crystals has been proposed to overcome performance limits of the existing highly-granularity calorimetry options and aims to achieve excellent resolutions of energy, 3D positioning and timing with the homogeneous structure. The ongoing studies on the detector design and optimisation have been...
Prof.
Huaqiao ZHANG
(IHEP)
17/08/2021, 14:35
5. 粒子物理实验技术
Oral report
This talk will present current status of the CMS Phase-2 endcap calorimeter upgrade (HGCAL) project, with a major focus on the R&D activities of the CMS-HGCAL team in China working on the silicon modules. A dedicated silicon detector lab on IHEP campus in Beijing has successfully been developed and will serve as one of six MACs around the world. The lab is now being commissioned for the...
Dr
Yifeng Wei
(USTC)
17/08/2021, 14:50
5. 粒子物理实验技术
Oral report
The DArk Matter Particle Explorer (DAMPE) is the first Chinese cosmic-ray direct detection experiment. It has been operating smoothly on-orbit since its successful launch at the end of 2015. Currently, its sub-detectors and the satellite are in good working order. The DAMPE payload employs a BGO Calorimeter for energy measurements, trigger and e/p identification. The calorimeter is constructed...
禹坤 石
(中国科学技术大学)
17/08/2021, 15:05
5. 粒子物理实验技术
Oral report
Based on the particle-flow algorithm, highly granular sampling hadron calorimetry (HCAL) with scintillator tiles or micro-pattern gas detectors (MPGDs) as active layers and stainless steel as absorber is proposed to achieve an unprecedented jet energy resolution to address major challenges of precision measurements at future lepton colliders, including the Circular Electron Positron Collider...
Yong Song
(USTC)
17/08/2021, 15:20
5. 粒子物理实验技术
Oral report
The Super Tau-Charm Facility (STCF), a new generation electron-positron collider in China, is proposed as a unique platform to study tau-charm physics. The baseline design of the electromagnetic calorimeter (ECAL) is based on pure CsI crystals with avalanche photodiodes readout.
A geometric model design for ECAL consists of 8670 pure CsI crystals with defocus operation will be presented....
Mr
健荣 周
(中国科学院高能物理研究所东莞分部)
, Mr
志嘉 孙
(中国科学院高能物理研究所东莞分部)
17/08/2021, 15:40
5. 粒子物理实验技术
Oral report
Neutron science and technology plays an irreplaceable role in national defense and industry. China spallation neutron source (CSNS) is a major science and technology platform for multidisciplinary applications. As one of the most expensive core equipment of neutron instruments, the neutron detector suffers from the technical blockade from the developed countries, and has become a neck bottle...
Mr
Xuantao Ji
(南华大学)
17/08/2021, 16:00
5. 粒子物理实验技术
Oral report
基于宇宙射线缪子的散射和透射技术对大尺寸和高原子序数物质（Z）物质成像是当前辐射探测成像领域的研究的两大方向，但基于缪子及其次级粒子符合探测技术对厘米级、中低Z物体的成像研究鲜有报道。初步搭建了一套由3层位置灵敏型探测器和4个快时间响应的塑料闪烁体探测器构成的体积为0.125m3的成像系统并利用Geant4软件模拟对该系统进行了模拟研究，利用缪子径迹及其次级粒子的符合探测技术获取缪子径迹和次级粒子的信息，使用以上采集的入射缪子径迹信息完成了待测物体的空间三维成像，利用次级粒子的信息完成了待测物体在Z上维度的分辨，实现了对物体的四维成像。
明萱 薛
(University of Science and Technology of China)
17/08/2021, 16:15
5. 粒子物理实验技术
Oral report
基于声子的探测技术——量热器，是近年来新发展起来的革命性探测方法，具有远超出常规探测技术的高灵敏度、低噪声水平等特性，是粒子探测技术的新发展方向。声子传感器是mK深冷低温量热器的关键部件，中子核嬗变掺杂高纯锗传感器（Transmutation Doped Ge Thermistors，NTD-Ge）是目前国际上主流的深冷低温声子传感器，是基于温度变化导致电阻急剧变化的原理。目前国内没有现成的产品，国际上也是配合低温粒子探测器所需要研制的特殊元件。NTD-Ge动态范围大，在粒子物理领域有较大的应用前景。本报告将主要介绍中科大团队自主研发设计NTD-Ge传感器的技术路线，着重介绍基于微结构气体探测器MMD、硅漂移半导体探测器SDD以及溴化镧闪烁体探测器LBC，实验与模拟相结合，对NTD-Ge研发中经北京原子能研究院401所反应堆中子辐照后的绝对中子通量的测试估算方法。
Dr
群刚 文
(安徽大学)
17/08/2021, 16:30
5. 粒子物理实验技术
Oral report
宇宙线缪子成像是当前核探测及应用的一个热点研究方向。由于宇宙线缪子具有动量高、范围广并且方向不确定等等原因，使得其动量在实际应用中难以测量。我们将利用散射成像实验装置进行实验测量，通过对散射成像的理论及分析算法进行创新性地研究，提出一种基于散射成像法的宇宙线缪子动量测量方式，用于简单、实用地实验测量高动量缪子。
Dr
Yu Wang
(State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China)
17/08/2021, 16:45
5. 粒子物理实验技术
Oral report
对物体内部结构和成份进行无损探测和成像，是认识物质世界的最直接手段之一。当前，X射线、电子、质子、中子等辐射成像技术已经应用到生产、生活以及科学研究的方方面面。然而，由于人造射线穿透力和覆盖面积有限，在特殊核材料检测和大尺度物体成像方面，仍存在很大的局限性。除了上述人造射线外，在地球表面，还有一种无处不在的射线——宇宙线缪子，其具有穿透强、覆盖范围大、无辐射危害等优点，能解决上述应用所面临的困难。
目前，宇宙线缪子成像技术发展尚未成熟，有大量的难点与挑战亟待攻克。本研究利用Micromegas探测器开展高分辨缪子成像系统研究，旨在研制一套高分辨、多用途的缪子成像装置（μSTC——μ Scattering and Transmission imaging...
煜 鲍
17/08/2021, 17:00
5. 粒子物理实验技术
Oral report
寻找带电轻子味道数破坏（cLFV）是探索超出标准模型新物理的有效手段之一。目前国际上欧美日均在投入大量资源寻找不同的cLFV过程。基于中国散裂中子源的高强度质子加速器，我们规划了一条高重复频率脉冲缪子源（HEMS）。基于该缪子源，我们提出了一项寻找正反缪子素转换过程的实验 – MuMuBar。该实验将以不同于目前国际上任何实验的方法寻找cLFV过程。本报告将介绍缪子源的设计进展以及MuMuBar实验的设计方案和缪子素产生、探测等技术进展。
Yongbo Huang
(Guangxi University)
17/08/2021, 17:15
5. 粒子物理实验技术
Oral report
A 20 kton liquid scintillator (LS) detector was designed in the Jiangmen Underground Neutrino Observatory (JUNO) for multiple physical purpose. In order to determine the neutrino mass ordering, JUNO needs an excellent energy resolution [3%/√E(MeV)] and an accurate energy scale determination [better than1%]. The JUNO experiment will install 25k 3-inch PMTs (SPMTs) in the gaps between 18k...
Mr
Zhen Qian
(Sun Yat-sen University)
18/08/2021, 08:30
5. 粒子物理实验技术
Oral report
Large-volume liquid scintillator detector with ultra-low background levels have been widely used to study neutrino physics and search for dark matter. The ability to accurately reconstruct particle interaction events is of great importance for
the success of the experiment. The signal collected by PMTs is used for estimation of the vertex and the energy of neutrino and background particle...
琳慧 顾
(Shanghai Jiao Tong University)
18/08/2021, 08:50
5. 粒子物理实验技术
Oral report
When incoming particle hits the xenon atoms in the PandaX dual-phase xenon detector, the ionized electrons drift upward and get amplified under electric fields, yielding a secondary scintillation signal (S2). The S2 signal is then collected by PMT arrays at the top of the detector, which keeps the position information of the original scattering event.
In the data analysis, position...
Dr
勋 谌
(Shanghai Jiao Tong University)
18/08/2021, 09:05
5. 粒子物理实验技术
Oral report
PandaX-4T is a multi-purpose detector employing the liquid xenon technology. It can be used to study the dark matter, solar neutrinos, supernova neutrinos as well as the neutrinoless double beta decay of Xe136. The detector has nearly 500 readout channels, each digitizing data at the sampling rate of 250 MHz. The output data rate of the detector when taking the background data is about 30-40...
He Li
(University of Science and Technology of China)
18/08/2021, 09:20
5. 粒子物理实验技术
Oral report
A geometry management system (GMS) is designed for the Offline Software of Super Tau Charm Facility (STCF) in China. Based on the eXtensible Markup Language (XML) and Detector Description Toolkit for High Energy Physics Experiments (DD4Hep), the system provides a consistent detector-geometry description for different offline applications, such as simulation, reconstruction and visualization....
文翰 代
(清华大学工程物理系)
18/08/2021, 09:35
5. 粒子物理实验技术
Oral report
SAGE（Simulation and Analysis for Germanium...
Kangkang Zhao
(University of Science and Technology of China)
18/08/2021, 09:50
5. 粒子物理实验技术
Oral report
Luminescent bolometric technique is a promising approach to detect extremely rare events in particle physics (such as neutrino-less double beta decay and dark matter), as it has low detection threshold, unparalleled energy resolution and unique particle discrimination. The output raw data of bolometer is a continuous stream binary file, which was obtained via sampling the electronics readout...
Jun Guo
(S)
18/08/2021, 10:05
5. 粒子物理实验技术
Oral report
ATLAS Phase-II upgrade will start approximately in 2023. Chinese cluster (USTC-SDU-SJTU) has been playing an important role in the Phase-II RPC production task. A laboratory for producing, testing and improving new type of RPC is constructed. The RPC to be adopted in the Phase-II upgrade is based on the 1mm gas gap of BIS7/8 upgrade. The simulation and measurement of this type of RPC have been...
bt zhang
(清华大学)
18/08/2021, 10:40
5. 粒子物理实验技术
Oral report
高纯锗探测器技术是0νββ实验研究中的代表性探测技术。0νββ末态的两个电子在锗晶体内射程很短，可以认为是“单点事例”。相反，环境本底事例则多为“多点事例”，因此可以通过单点/多点事例甄别去除多点事例从而压低本底。本工作基于BEGe和PPCGe两种类型高纯锗探测器，使用电流最大值参数A和沉积能量E的比值A/E作为甄别参数，开展了单点/多点事例甄别方法研究，取得了显著的降低本底的效果，并利用放射源刻度数据对甄别效率进行了检验。
李院霞 LI Yuanxia
(高能所)
18/08/2021, 11:00
5. 粒子物理实验技术
Oral report
In order to screen the materials for low background detectors for Jiangmen Underground Neutrino Observatory (JUNO) and future double-beta decay experiments, the natural radioactivity of some related materials requires measurement to sub-ppt level. The inductively coupled plasma mass spectroscopy(ICP-MS) is dedicated used to measure the materials with ultra-low radioactivity due to its high...
新平 耿
(清华大学)
18/08/2021, 11:15
5. 粒子物理实验技术
Oral report
继CDEX-1，CDEX-10以后，CDEX合作组正在建设50公斤级的高纯锗阵列实验系统（CDEX-50dm）用于轻质量暗物质直接探测。CDEX-50dm将由PPCGe和BEGe天然锗探测器组成，本底控制在0.01cpkkd@1keV水平，物理目标是WIMP自旋无关灵敏度达到10^-44 cm^2水平。针对CDEX-50dm的本底控制目标，详细模拟了高纯锗探测器从原料处理、制备、运输和探测器研制等各个环节的本底控制，建立了探测器生产标准流程。建立了CDEX-50dm探测器本底模型，并给出本底优化控制方案。
Mrs
Haiyan Du
(sjtu)
18/08/2021, 11:30
5. 粒子物理实验技术
Oral report
极低本底材料的筛选对于稀有事列的探测（如暗物质直接探测，无中微子双贝塔衰变）极为重要，材料本底已经成为限制其灵敏度的关键因素之一。我们设计了一款带电粒子谱仪，主要用于测量材料表面放射性。谱仪的核心是一个低本底，高精度，有效测量面积约2000 cm2的气体时间投影室（TPC）。 TPC采用Micromegas 探测器作为读出平面，具有同时测量粒子能量与径迹的功能。利用气体TPC 独特的径迹重建功能，我们可以很好的辨别粒子来源，从而进一步压低本底，提高谱仪的灵敏度。本次报告将主要报告谱仪的概念设计及其原型探测器的初步测试。
益阳 武
(Tsinghua University)
18/08/2021, 11:45
5. 粒子物理实验技术
Oral report
Liquid scintillator detectors play an important role in neutrino experiments, for its low threshold and high resolution in energy measurements. Traditionally they are treated as event calorimeters, which is not enough for high precision measurements. Low energy neutrino events may pile-up with radioactive background such as ${}^{14}$C, smearing the energy spectrum if pile-ups are treated as...
