CSNS多功能反射谱仪主探测器读出电子学系统研制  

Development of readout electronics system for main detector of CSNS multi-function reflectance spectrometer

作　　者：曾莉欣 赵豫斌[1,2,3] 陈少佳 田兴成[1,2,3] 于莉 骆宏[1,2,3] 王艳凤 赵东旭 孙志嘉[1,2,3] Zeng Lixin;Zhao Yubin;Chen Shaojia;Tian Xingcheng;Yu Li;Luo Hong;Wang Yanfeng;Zhao Dongxu;Sun Zhijia(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Spallation Neutron Source Science Center,Dongguan 523803,China;State Key Laboratory of Particle Detection and Electronics,Beijing 100049,China)

机构地区：[1]中国科学院高能物理研究所,北京100049 [2]散裂中子源科学中心,广东东莞523803 [3]核探测与核电子学国家重点实验室,北京100049

出　　处：《强激光与粒子束》2021年第8期175-181,共7页High Power Laser and Particle Beams

基　　金：核探测与核电子学国家重点实验室项目(SKLPDE-ZZ-201801);国家自然科学基金重点项目(11635012)。

摘　　要：为满足中国散裂中子源(CSNS)多功能反射谱仪(MR)主探测器高气压^(3)He多丝正比室探测器(MWPC)的需求,研制了专用的读出电子学系统。该系统主要由核心前放板和触发扇出板构成,其中以前放板为核心,采用了6块前放板实现探测器142路模拟信号的数字化,并通过判选机制甄别中子信息,将有效中子事例打包发送给后端,触发扇出板提供同一时刻到达的T0信号和触发信号,以确保数据的对齐。读出电子学系统分别在实验室和束流条件下,进行了相关指标测试,测试结果表明性能优于设计要求。目前MWPC探测器已经成功安装到MR谱仪现场,并且已经开始稳定运行。A special readout electronic system was developed to meet the needs of the ^(3)He multiwire proportional chamber detector(MWPC)of multi-functional reflectance spectrometer(MR)of China Spallation Neutron Source(CSNS).The system is mainly composed of core preamplifier board and trigger fan out board.Six preamplifier boards are used to digitize 142 analog signals of the detector.The neutron information is screened through the discrimination mechanism,and the effective neutron cases are packaged and sent to the back end.The trigger fan out board provides the T0 signal and trigger signal arriving at the same time to ensure the alignment of data.The readout electronics system has been tested in laboratory and beam conditions respectively.The test results show that the performance is better than the design requirements.At present,the MWPC detector has been successfully installed in the field of MR spectrometer,and has begun to operate stably.

关 键 词：多功能反射谱仪 多丝正比室探测器 重心法 前置放大器 可编程逻辑阵列 

分 类 号：TL99[核科学技术—核技术及应用]