掺杂型MCP板的热中子探测效率蒙卡模拟研究

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• 英文论文题名：The Study of Thermal Neutron Detection Efficiency with Monte-Carlo Simulation for Doped Microchannel Plates
• 论文作者：王胜 ; 李航 ; 曹超 ; 唐科 ; 吴洋 ; 霍合勇 ; 唐彬
• 英文论文作者：Sheng Wang ; Hang Li ; Chao Cao ; Ke Tang ; Yang Wu ; Heyong Huo ; Bin Tang ; Institute of Nuclear Physics and Chemistry ; CAEP
• 年：2014
• 作者机构：中国工程物理研究院核物理与化学研究所;
• 论文关键词：热中子探测 ; MCP板 ; 蒙卡模拟 ; 优化计算
• 英文论文关键词：Thermal Neutron Detection ; Microchannel Plates ; Monte-Carlo Simulation ; Optimize Calculation
• 会议召开时间：2014-08-13
• 会议录名称：第十七届全国核电子学与核探测技术学术年会论文集
• 语种：中文
• 分类号：TL816.3
• 学会代码：HDZX
• 会议名称：第十七届全国核电子学与核探测技术学术年会
• 会议地点：中国甘肃兰州
• 主办单位：中国电子学会、中国核学会核电子学与核探测技术分会
• 学会名称：中国电子学会核电子学与核探测技术分会
• 页数：9
• 文件大小：952k
• 原文格式：D
• 会议级别：全国

摘要

基于MCP的热中子探测技术近年来发展迅速,该技术能够实现高空间分辨率和高探测效率。本文利用MCNP程序,对掺杂型热中子敏感MCP板的探测效率进行蒙卡模拟计算,针对不同结构形状和几何尺寸的MCP板,在不同成分不同比例的中子敏感材料掺杂情况下,计算其对热中子的探测效率。通过计算,初步得到了较为优异的MCP板结构参数和材料成分,为后续的MCP探测器开发提供帮助。对~(10)B的掺杂计算表明,掺杂浓度较大时,MCP板厚度为2mm时,探测效率接近80%,对15μm的栅格大小,高掺杂比例时最佳探测效率出现在MCP通道直径为10-12μm时。
The thermal neutron detection method with Microchannel Plates(MCP) has developed a lot in the last several years, which could supply high spatial resolution and high time differentiate for thermal neutron detection. This thesis will calculate the detection efficiency of thermal neutron MCP doped of Boron and Gadolinium with MCNP. The calculation will compare the detection efficiency with different thickness of MCPs, different doped materials, different doped proportion and different structure of MCPs. The calculation results show that, the optimal structure of MCP decided by the doped proportion. With high proportion of Boron doped into MCPs, the detection efficiency will be nearly to 80% with the thickness of MCPs as 2mm. When the grid size of MCPs is 15μm, the optimal neutron detection efficiency appears with channel diameter size as 10-12μm.

引文

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