Non-uniformity effects of the inter-foil distance on GEM detector performance

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Yan Huang, Han YI, Zhi-Gang Xiao, Zhao Zhang, Wen-Jing Cheng, Li-Ming Lü, Wei-Hua Yan, Ren-Sheng Wang, Hong-Jie Li, Yan Zhang, Li-Min Duan, Rong-Jiang Hu, Chen-Gui Lu, He-Run Yang, Peng Ma and Hai-Yan Gao. Non-uniformity effects of the inter-foil distance on GEM detector performance[J]. Chinese Physics C, 2016, 40(4): 046001. doi: 10.1088/1674-1137/40/4/046001
Yan Huang, Han YI, Zhi-Gang Xiao, Zhao Zhang, Wen-Jing Cheng, Li-Ming Lü, Wei-Hua Yan, Ren-Sheng Wang, Hong-Jie Li, Yan Zhang, Li-Min Duan, Rong-Jiang Hu, Chen-Gui Lu, He-Run Yang, Peng Ma and Hai-Yan Gao. Non-uniformity effects of the inter-foil distance on GEM detector performance[J]. Chinese Physics C, 2016, 40(4): 046001.  doi: 10.1088/1674-1137/40/4/046001 shu
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Received: 2015-04-23
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    Supported by National Natural Science Foundation of China(11375094, U1332207, 11120101004), and by Tsinghua University Initiative Scientific Research Program

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Non-uniformity effects of the inter-foil distance on GEM detector performance

    Corresponding author: Zhi-Gang Xiao,
  • Department of Physics, Tsinghua University, Beijing 100084, China;
    2. Collaborative Innovation Center of Quantum Matter, Beijing 100084, China;
    3. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
    4. Department of Physics and Triangle Universities Nuclear Laboratory, Duke University, Durham, NC 27708, U. S. A.;
    5. Duke Kunshan University, Kunshan, Jiangsu 215316, China
Fund Project:  Supported by National Natural Science Foundation of China(11375094, U1332207, 11120101004), and by Tsinghua University Initiative Scientific Research Program

Abstract: The non-uniformity effect of the inter-foil distance has been studied using a gaseous electron multiplication(GEM) detector with sensitive area of 50mm×50mm. A gradient of the inter-foil distance is introduced by using spacers with different heights at the two ends of the foil gap. While the cluster size and the intrinsic spatial resolution show insignificant dependence on the inter-foil distance, the gain exhibits an approximately linear dependence on the inter-foil distance. From the slope, a quantitative relationship between the change of the inter-foil distance and the change of the gain is derived, which can be used as a method to evaluate the non-uniformity of the foil gap in the application of large-area GEM detectors.

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