Performance study of a GEM-TPC prototype using cosmic rays
Performance study of a GEM-TPC prototype using cosmic rays
复制标题
DOI：
10.1016/j.nima.2008.08.022
复制
发表时间：
2008-11
影响因子：
1.4
通讯作者：
Yulan Li;H. Qi;Jin Li;Yuanning Gao;Yuanjing Li;Zhenwei Yang;K. Fujii;T. Matsuda
中科院分区：
文献类型：
--
作者：
Yulan Li;H. Qi;Jin Li;Yuanning Gao;Yuanjing Li;Zhenwei Yang;K. Fujii;T. Matsuda
时间投影室（TPCs）作为中心跟踪装置已成功地应用于许多高能物理实验中。然而，未来高能物理实验对tpc的性能要求大大超出了传统多线比例室（MWPCs）读出tpc的能力。微模式气体探测器（mpgd），如气体电子倍增器（GEMs）或微气体，在用作读出探测器时具有很大的潜力来提高TPC性能。为了评估其可行性，设计了一个漂移长度达50cm的基于gem的TPC原型。给出了有磁场（B=1T）和无磁场（B=1T）宇宙射线轨迹空间分辨率的测量结果。该方法取得了非常好的性能，符合mpgd读出TPC空间分辨率的解析公式。一项专门的研究表明，增加GEM探测器的增益可以提高TPC的空间分辨率。
Time projection chambers (TPCs) have been successfully used as the central tracking devices in a number of high-energy physics experiments. However, the performance requirements on TPCs for future high-energy physics experiments greatly exceed the abilities of traditional TPCs read out by multi-wire proportional chambers (MWPCs). Micro-pattern gas detectors (MPGDs), such as gas electron multipliers (GEMs) or micromegas, have great potential to improve TPC performance when used as readout detectors. In order to evaluate its feasibility, a GEM-based TPC prototype with a drift length up to 50cm was designed. Measurements of the spatial resolution of cosmic-ray tracks without and with a magnetic field (B=1T) are presented. A very good performance is achieved, matching the analytic formula for the spatial resolution of a MPGD-readout TPC. A dedicated study shows that the increase of GEM detector gain can improve the TPC's spatial resolution.