Performance study of the PTFE-THGEM at room and low temperature

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XIE Wen-Qing, LI Yu-Lan, LI Yuan-Jing and YUE Qian. Performance study of the PTFE-THGEM at room and low temperature[J]. Chinese Physics C, 2013, 37(11): 116001. doi: 10.1088/1674-1137/37/11/116001
XIE Wen-Qing, LI Yu-Lan, LI Yuan-Jing and YUE Qian. Performance study of the PTFE-THGEM at room and low temperature[J]. Chinese Physics C, 2013, 37(11): 116001.  doi: 10.1088/1674-1137/37/11/116001 shu
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Received: 2013-01-30
Revised: 1900-01-01
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Performance study of the PTFE-THGEM at room and low temperature

    Corresponding author: XIE Wen-Qing,

Abstract: GPM based on THGEM has shown its competitive strength compared to the conventional PMT,especially in the low background research such as dark matter detection. A kind of THGEM made from PTFE,named PTFE-THGEM,is developed for the GPM to be used in CDEX. The PTFE has a lot of advantages especially its low level radioactivity. The PTFE-THGEM was tested at room and cryogenic temperature. It has a high gain in different gases and shows good stability at room temperature. The gain of a single PTFE-THGEM reached 112 at 117 K. The penning effect is also discussed in this paper to explain the “abnormal” phenomena of the gain in different gases.

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