The Cylindrical GEM Inner Tracker of the BESIII experiment: prototype test beam results
文献类型：期刊论文
| 作者 | CGEM-IT group |
| 刊名 | JOURNAL OF INSTRUMENTATION
 |
| 出版日期 | 2017 |
| 卷号 | 12页码:C07038 |
| 关键词 | Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC MICROMEGAS, InGrid, etc) Particle tracking detectors (Gaseous detectors) |
| ISSN号 | 1748-0221 |
| DOI | 10.1088/1748-0221/12/07/C07038 |
| 文献子类 | Article; Proceedings Paper |
| 英文摘要 | A cylindrical GEM detector is under development, to serve as an upgraded inner tracker at the BESIII spectrometer. It will consist of three layers of cylindrically-shaped triple GEMs surrounding the interaction point. The experiment is taking data at the e(+)e(-) collider BEPCII in Beijing (China) and the GEM tracker will be installed in 2018. Tests on the performances of triple GEMs in strong magnetic field have been run by means of the muon beam available in the H4 line of SPS (CERN) with both planar chambers and the first cylindrical prototype. Efficiencies and resolutions have been evaluated using different gains, gas mixtures, with and without magnetic field. The obtained efficiency is 97-98% on single coordinate view, in many operational arrangements. The spatial resolution for planar GEMs has been evaluated with two different algorithms for the position determination: the charge centroid and the micro time projection chamber (mu-TPC) methods. The two modes are complementary and are able to cope with the asymmetry of the electron avalanche when running in magnetic field, and with non-orthogonal incident tracks. With the charge centroid, a resolution lower than 100 mu m has been reached without magnetic field and lower than 200 mu m with a magnetic field up to 1 T. The mu-TPC mode showed to be able to improve those results. In the first beam test with the cylindrical prototype, the detector had a very good stability under different voltage configurations and particle intensities. The resolution evaluation is in progress. |
| 会议地点 | Budker Inst Nucl Phys, Novosibirsk, RUSSIA |
| 会议日期 | FEB 27-MAR 03, 2017 |
| WOS研究方向 | Instruments & Instrumentation |
| 语种 | 英语 |
| WOS记录号 | WOS:000406420100038 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/284815]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | CGEM-IT group. The Cylindrical GEM Inner Tracker of the BESIII experiment: prototype test beam results[J]. JOURNAL OF INSTRUMENTATION,2017,12:C07038. |
| APA | CGEM-IT group.(2017).The Cylindrical GEM Inner Tracker of the BESIII experiment: prototype test beam results.JOURNAL OF INSTRUMENTATION,12,C07038. |
| MLA | CGEM-IT group."The Cylindrical GEM Inner Tracker of the BESIII experiment: prototype test beam results".JOURNAL OF INSTRUMENTATION 12(2017):C07038. |
入库方式： OAI收割
来源：高能物理研究所
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