Electron transmission efficiency of gating-GEM foil for TPC
Electron transmission efficiency of gating-GEM foil for TPC
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DOI：
10.1088/1674-1137/36/4/008
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发表时间：
2012-04
影响因子：
3.6
通讯作者：
Wenqing Xie;Meng Huang;Ting Li;Yang Tian;Yulan Li;Yuanjing Li
中科院分区：
文献类型：
--
作者：
Wenqing Xie;Meng Huang;Ting Li;Yang Tian;Yulan Li;Yuanjing Li
在TPC中，来自读出检测器的离子反馈可引起空间电荷效应并使漂移区中的电场失真。门控是解决这一问题的有效方法之一，它可以以损失一定数量的初级电子为代价来阻挡离子。与传统的线结构设计相比，基于GEM箔的门控由于其结构简单而更具吸引力。本文通过模拟和实验研究了影响电子传输效率的因素。通过对这些参数的优化，获得了80%以上的电子传输效率。
In a TPC, ion feedback from the readout detector can cause a space-charge effect and distort the electrical field in the drift region. Gating is one of the effective methods to solve this problem, which can block ions at the expense of losing a certain amount of primary electrons. Compared with the traditional design with a wire structure, gating based on GEM foil is more attractive because of its simplicity. In this paper, the factors influencing the electron transmission efficiency are studied with simulations and experiments. After optimizing all these parameters, an electron transmission efficiency over 80% is obtained.