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Magnetic field measurement for BelleII detector (BelleII探测器的磁场测量)
by
DrAiqiang GUO
(DESY)
→
Asia/Shanghai
B326
B326
Description
Abstract:
The BelleII detector operating at SuperKEKB is a major upgrade of the previous KEKB B factory facility in KEK, Tsukuba, Japan. It is designed to explore new physics beyond standard model with the data of approximately 50 times larger than its predecessor. At present, the BelleII detector is assembled partially and prepared for phase-II data taking in near future. The detector is designed to maintain the current performance of Belle in an environment with considerably higher background levels. A superconductor solenoid outer Center-Drift-Chamber(CDC) provide 1.5 T magnetic field for tracking detector. To reach high luminosity, a new final focusing superconducting magnet system is developed for BelleII. Therefore, measuring the B field inside CDC with high accuracy is not only important for track reconstruction but also for the luminosity increasing. The B field measurement is performed by 2 steps. Firstly, the B field inside CDC provided by solenoid is mapped before CDC installation. Secondly, after CDC is installed, the B field provided by solenoid and QCS is measured in the VXD region and the gap between CDC and QCS.
简介：
即将运行在superKEKB上的BelleII是Belle实验的升级，将提供四十倍的亮度，运行期间预计收集约50倍的数据，为新物理寻找提供前所未有的精度。BelleII 探测器目前已经部分安装完毕，为即将到来的PhaseII阶段取数做准备。 BelleII探测器设计目标为在高本底情况下保持与Belle相当的性能，其位于主漂室外的超导线圈为迳迹探测器提供1.5T的磁场，此外为了达到高亮度，BelleII采用全新的聚焦磁铁系统，因此对于CDC及以内空间的磁场测量不仅对于径迹重建提供重要数据，还对亮度提高有重要意义。BelleII的磁场测量分为两个步骤，首先在CDC安装之前，测量主漂室和顶点探测器空间由超导线圈提供的磁场。然后CDC和QCS安装之后，在顶点探测器及QCS与CDC之间有限空间，测量由超导线圈和QCS共同提供的磁场。
报告人简介：
2013年获得南开大学博士学位，研究课题为BESIII上粲偶素的跃迁。2013-2016年在高能所做博后，主要研究课题包括粲偶素能谱和XYZ物理。2016-现在，参加中德博后交流计划到DESY做博士后，参与BelleII探测器磁场测量。
CV:
Obtained Ph.D from Nankai University in 2013, the research topic is charmonium transition at BESIII. 2013-2016, IHEP post doctor, main work includes charmonium spectroscopy and XYZ physics；2016-now, joining The International Postdoctoral Exchange Fellowship Program and work at DESY as post doctor. Taking part in the effort to map the magnetic field of BelleII detector.
