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

作　　者：王晓冬 杨贺润 任忠国 张俊伟 杨磊 张春晖 哈日巴拉 安旅行 胡碧涛 

机构地区：[1]School of Nuclear Science and Technology, Lanzhou University [2]Institute of Modern Physics, Chinese Academy of Sciences [3]China Academy of Engineering Physics [4]Inner Mongolia Center for Disease Control and Prevention [5]LWD Logging Center, China Petroleum Logging CO. LTD.

出　　处：《Chinese Physics C》2015年第2期39-43,共5页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11135002,11305232,11175076)

摘　　要：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 with55 Fe X-ray source to ensure that it has a good performance.The effective gain and obtained energy resolution is 5.0×104and 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.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 with55 Fe X-ray source to ensure that it has a good performance.The effective gain and obtained energy resolution is 5.0×104and 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.

关 键 词：Gas Electron Multiplier deposited energy Am-Be neutron source neutron detection efficiency fast neutron detector 

分 类 号：O572.212[理学—粒子物理与原子核物理]