高分辨中子闪烁体探测器读出电子学研制  

Development of readout electronics for high resolution neutron scintillator detector

作　　者：周诗慧 黄河[3] 万志永 陈少佳[2,4] 朱志甫 唐彬 黄畅[2,4] 王修库 曾莉欣 于莉[2,4] 杨浩 刘慧银 岳秀萍 赵豫斌[2,4] 孙志嘉 ZHOU Shihui;HUANG He;WAN Zhiyong;CHEN Shaojia;ZHU Zhifu;TANG Bin;HUANG Chang;WANG Xiuku;ZENG Lixin;YU Li;YANG Hao;LIU Huiyin;YUE Xiuping;ZHAO Yubin;SUN Zhijia(Zhengzhou University,Zhengzhou 450001,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Engineering Research Center of Nuclear Technology Application(East China University of Technology),Ministry of Education,Nanchang 330013,China;Spallation Neutron Source Science Center,Dongguan 523803,China)

机构地区：[1]郑州大学,郑州450001 [2]中国科学院高能物理研究所,北京100049 [3]核技术应用教育部工程研究中心、东华理工大学,南昌330013 [4]散裂中子源科学中心,东莞523803

出　　处：《核技术》2023年第11期30-39,共10页Nuclear Techniques

基　　金：国家自然科学基金面上基金项目(No.11875273,No.61964001,No.12275049);广东省基础与应用基础研究基金项目(No.2020B1515120025);河南省高等学校重点科研项目(No.22A490001);江西省重点研发计划项目(No.20212BBG73012);核技术应用教育部工程研究中心开放基金(No.HJS2021)资助。

摘　　要：能量分辨中子成像谱仪是中国散裂中子源当前在建的谱仪之一,其衍射探测器90°分区采用6LiF/ZnS中子闪烁体探测器作为探测设备。为实现探测器高位置分辨,读出电子学系统采用了一种电容网络复合读出电路和电荷重心法相结合的实现方法,并研制了电子学样机。该样机由电容网络复合读出电路、前置放大板和数字读出板三部分组成,基本功能验证完成后,分别在实验室和中国散裂中子源的20号束线上进行了相关性能参数测试,测试结果显示:电子学的积分非线性≤0.95%,时间分辨约为12 ns;探测器位置分辨为1 mm、探测效率为65%@1.6?,均达到了工程设计指标。该样机的成功研制为能量分辨中子成像谱仪未来顺利开展谱仪实验提供了可靠的技术保障。[Background]The Energy Resolved Neutron Imaging Spectrometer(ERNI)of China Spallation Neutron Source(CSNS)is in process of building,whose diffraction detector with ninety degree partition adopts 6LiF/ZnS neutron scintillator detector with a 90°partition as its detection equipment.[Purpose]This study aims to develop the readout electronics for high position resolution neutron scintillator detector of ERNI.[Methods]Firstly,a capacitive network combined with center-of-gravity of the induced charge distribution was adopted for the design of readout electronics.Then,a prototype of the readout electronics system consisted of three parts:capacitive network circuit,preamplifier board and digital readout board,was developed.After functional verification,the relevant performance parameters of the developed prototype were experimentally tested in the laboratory and in the No.20 beam line of CSNS.[Results]The experimental results show that the integration nonlinearity of electronics is better than 0.95%,the time resolution is about 12 ns,the position resolution is 1mm,and the detection efficiency is 65%@1.6Å.[Conclusions]The prototype meets the design specifications of the project.The successful development of the prototype provides a reliable technical support for the smooth development of the spectrometer experiment in ERNI of CSNS in the future.

关 键 词：电容网络 中子闪烁体探测器 硅光电倍增管 电荷重心法 可编程门阵列(Field Programmable Gate Array FPGA) 

分 类 号：TL99[核科学技术—核技术及应用]