摘要
工程材料中子衍射谱仪(Engineering Material Diffraction,EMD)是中国散裂中子源(China Spallation Neutron Source,CSNS)工程在建的谱仪,它采用了中子闪烁体探测器作为主探测器。读出电子学实现把探测器输出的微弱信号调理并数字化,然后进行打包、缓存等处理后发送给后端。为了实现智能化探测器研发以及数据处理前置化,EMD读出电子学采用了全新的设计架构,它由前端电子学和SoC电子学两部分组成。设计完成后,在实验室和CSNS 20号束线对读出电子学进行了性能测试。测试结果表明:读出电子学的非线性误差小于1.2%,最高计数率为233.6 k·s^(-1),时间分辨为13 ns,探测器的探测效率约为40.7%@0.1 nm,均达到了设计指标,从而为EMD的顺利建设提供了良好的技术支撑。
[Background]The Engineering Material Diffraction(EMD)of China Spallation Neutron Source(CSNS)is currently under construction.It adopts the neutron scintillator detector as its main detection unit.[Purpose]This study aims to develop an intelligent readout electronics system for the main detectors of EMD and the front-loading of data processing.[Methods]A completely new architecture was adopted in the design of the readout electronics of EMD,consisting of the front-end electronics and SoC electronics.The front-end electronics consisted of two front preamplifier boards and a digital board.The parameter configuration of front-end electronics and the aggregation,trigger selection and packaging of original data were realized by the SOC electronics which also provided physical hardware,embedded Linux system,driver and other support for data processing,and completes the analysis and processing of front-end data,and then sends the processed data to the back-end system through Gigabit Ethernet.The migration of algorithms originally operating on backend servers to a System-on-Chip(SoC)based on Field Programmable Gate Array(FPGA)chips was implemented to achieve front-loaded data processing that reduced computational pressure on server infrastructure.The architecture enabled intelligent automated control and continuous condition monitoring of detector arrays and their integrated electronic subsystems.Finally,performance testing of the designed readout electronics was conducted in the laboratory and on the No.20 beam line of CSNS.[Results]The test results show that the nonlinear error in the readout electronics is less than 1.2%,the maximum counting rate is 233.6 k·s^(-1),the time resolution is 13 ns,and the detection efficiency of the detector is approximately 40.7%@0.1 nm.[Conclusions]The performance of the readout electronics developed in this study meet the design specifications for the main detectors of EMD.Its successful development provides an important technical support for the construction of EMD.
作者
李思雨
路书祥
陈少佳
于莉
唐彬
王修库
刘慧银
崔文清
卢梦玮
宋闯
付佳佳
赵豫斌
孙志嘉
LI Siyu;LU Shuxiang;CHEN Shaojia;YU Li;TANG Bin;WANG Xiuku;LIU Huiyin;CUI Wenqing;LU Mengwei;SONG Chuang;FU Jiajia;ZHAO Yubin;SUN Zhijia(Zhengzhou University,Zhengzhou 450001,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Spallation Neutron Source Science Center,Dongguan 523803,China)
出处
《核技术》
北大核心
2025年第9期98-106,共9页
Nuclear Techniques
基金
广东省基础与应用基础研究基金(No.2022B1515120071)资助。
