Study on the novel neutron-to-proton convertor for improving the detection efficiency of a triple GEM based fast neutron detector

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WANG Xiao-Dong, YANG He-Run, REN Zhong-Guo, ZHANG Jun-Wei, YANG Lei, ZHANG Chun-Hui, HA Ri-Ba-La, AN L and HU Bi-Tao. Study on the novel neutron-to-proton convertor for improving the detection efficiency of a triple GEM based fast neutron detector[J]. Chinese Physics C, 2015, 39(2): 026001. doi: 10.1088/1674-1137/39/2/026001
WANG Xiao-Dong, YANG He-Run, REN Zhong-Guo, ZHANG Jun-Wei, YANG Lei, ZHANG Chun-Hui, HA Ri-Ba-La, AN L and HU Bi-Tao. Study on the novel neutron-to-proton convertor for improving the detection efficiency of a triple GEM based fast neutron detector[J]. Chinese Physics C, 2015, 39(2): 026001.  doi: 10.1088/1674-1137/39/2/026001 shu
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Received: 2014-03-14
Revised: 1900-01-01
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Study on the novel neutron-to-proton convertor for improving the detection efficiency of a triple GEM based fast neutron detector

    Corresponding author: HU Bi-Tao,

Abstract: A high-efficiency fast neutron detector prototype based on a triple Gas Electron Multiplier (GEM) detector, which, coupled with a novel multi-layered high-density polyethylene (HDPE) as a neutron-to-proton converter for improving the neutron detection efficiency, is introduced and tested with the Am-Be neutron source in the Institute of Modern Physics (IMP) at Lanzhou in the present work. First, the developed triple GEM detector is tested by measuring its effective gain and energy resolution with 55Fe X-ray source to ensure that it has a good performance. The effective gain and obtained energy resolution is 5.0×104 and around 19.2%, respectively. Secondly, the novel multi-layered HDPE converter is coupled with the cathode of the triple GEM detector making it a high-efficiency fast neutron detector. Its effective neutron response is four times higher than that of the traditional single-layered conversion technique when the converter layer number is 38.

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