多层涂硼GEM中子探测器的研究

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• 英文论文题名：Study on the multilayer boron-coated GEM neutron detector
• 论文作者：李科 ; 周健荣 ; 周良 ; 许虹 ; 杨桂安 ; 王艳凤 ; 谢宇广 ; 孙志嘉 ; 胡碧涛 ; 杨雷 ; 宋跃
• 英文论文作者：LI Ke ; ZHOU Jian-Rong ; XIE Yu-guang ; ZHOU Liang ; XU Hon ; YANG Gui-An ; WANG Yan-feng ; SUN Zhi-jia ; HU Bi-tao ; YANG Lei ; SONG Yue ; School of Nuclear Science and Technology ; Lanzhou University ; China Spallation Neutron Source(CSNS) ; Institute of High Energy Physics(IHEP) ; Chinese Academy of Sciences(CAS) ; Dongguan Institute of Neutron Science(DINS) ; Dongguan University of Technology
• 年：2015
• 作者机构：兰州大学核科学与技术学院;中国科学院高能物理研究所东莞分部;东莞中子科学中心;东莞理工学院;
• 论文关键词：GEM ; 中子探测 ; 硼转化 ; ~3He替代 ; Geant 4
• 英文论文关键词：GEM ; neutron detection ; boron convertor ; alternative to ~3He ; Geant 4
• 会议召开时间：2015-09-21
• 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第9册（核技术经济与管理现代化分卷、核电子学与核探测技术分卷、核测试与分析分卷）
• 语种：中文
• 分类号：TL816.3
• 学会代码：EGVD
• 会议名称：中国核学会2015年学术年会
• 会议地点：中国四川绵阳
• 主办单位：中国核学会
• 学会名称：中国核学会
• 页数：6
• 文件大小：753k
• 原文格式：O
• 会议级别：全国

摘要

随着国际上新一代中子源的发展,传统的中子探测器已经不能满足高通量的应用需求,同时面临当前~3He气体资源严重短缺的国际形势,研究替代~3He的新型中子探测器已成为粒子探测领域的研究热点。基于GEM(Gaseous Electron Multiplier)的中子探测器,计数率高,并且具有较高的位置与时间精度,是未来替代~3He中子探测器的一个发展方向。本文主要利用Geant 4程序包对探测器物理过程进行蒙特卡洛(Monte Carlo)模拟,主要研究了热中子转换效率与硼中子转化层厚度、层数的关系,同时,根据中子探测的特殊性,高能物理研究所专门研发了一种基于陶瓷材料的nTHGEM(Neutron THick GEM),并利用X光机对其进行了初步的性能测试,为国内今后自主发展基于GEM的中子探测器提供了参考。
With the international development of the new generation neutron source,the traditional neutron detector can't satisfy well the demand of the application of the high flux especially.And facing the global crisis of ~3He supply,the research on the new style of the neutron detector as an alternative to He-3 becomes the present international research hotspot in the field of particle detection.The GEM(Gaseous Electron Multiplier) neutron detector has the outstanding performance of high counting rate,good spatial and timing resolution,which would be one future direction of the development on the neutron detector.In this paper,the physical process of the neutron detection is described with the Geant 4 code,which mainly studies the relations between the thermal conversion efficiency,boron thickness and layer numbers.Due to the special characteristics of the neutron detection,IHEP have developed one novel type of customized ceramic nTHGEM(Neutron THick GEM)for the neutron detection.The performance of nTHGEM working in Ar/CO_2 mixtures is reported in details,including the measurements of the gain,the range of HV and the energy resolution by using the copper target X-ray source.According to this work,the key parameters of the performance of nTHGEM detector has been obtained,which will provide the necessary experimental data reference for the next research on neutron detection.

引文

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    [2]Dana A.Shea et al.The Helium-3 Shortage:Supply,Demand,and Options for Congress[R],Congressional Research Service,2010.
    [3]Zhou JianRong et al.Neutron beam monitor based on a boron-coated GEM,Chinese Physics C,2011,35(7):668-674.
    [4]Wang YanFeng et al.Simulation study on the boron-coated GEM neutron beam monitor,SCIENCE CHINAPHYSICS MECHANICS&ASTRONOMY,2013,Vol.56 No.10:1897-1902.
    [5]He ZhanYing et al.Experimental studies of THGEM in different Ar/C02 mixtures,Chinese Physics C Vol.38,No.5(2014)056003.
    [6]Xie YuGuang et al.Development of Au-coated THGEM for single photon,charged particle,and neutron detection,Nucl.Instr.and Meth.A,2013,Vol.729:809-815.