Electron transmission efficiency of gating-GEM foil for TPC

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XIE Wen-Qing, HUANG Meng, LI Ting, TIAN Yang, LI Yu-Lan and LI Yuan-Jing. Electron transmission efficiency of gating-GEM foil for TPC[J]. Chinese Physics C, 2012, 36(4): 339-343. doi: 10.1088/1674-1137/36/4/008
XIE Wen-Qing, HUANG Meng, LI Ting, TIAN Yang, LI Yu-Lan and LI Yuan-Jing. Electron transmission efficiency of gating-GEM foil for TPC[J]. Chinese Physics C, 2012, 36(4): 339-343.  doi: 10.1088/1674-1137/36/4/008 shu
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Received: 2011-07-08
Revised: 2011-07-25
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Electron transmission efficiency of gating-GEM foil for TPC

    Corresponding author: LI Yu-Lan,

Abstract: 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 in uencing the electron transmission e ciency are studied with simulations and experiments. After optimizing all these parameters, an electron transmission e ciency over 80% is obtained.

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