Readout electronics for the gamma detector of the HIRFL-CSR external target facility

• Published in: Nuclear science and techniques Vol. 36; no. 2; pp. 122 - 132
• Main Authors: Li, Xian-Qin, Yang, Hai-Bo, Ma, Xiao-Meng, Zou, Chao-Jie, Liu, Tao, Zhou, Xian-Cai, Yan, Duo, Su, Yang-Zhou, Tang, Shu-Wen, Wang, Shi-Tao, Yu, Yu-Hong, Sun, Zhi-Yu, Zhao, Cheng-Xin
• Format: Journal Article
• Language: English
• Published: School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China%Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China 01.02.2025; Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China; School of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,China%Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China; School of Big Data and Information Engineering,Guizhou University,Guiyang 550025,China
• Subjects: Common readout unit; HIRFL-CSR; Gamma detector; Peak-detection algorithm; External target facility; Readout control unit; Readout electronics
• ISSN: 1001-8042; 2210-3147
• DOI: 10.1007/s41365-024-01603-1

The Cooling Storage Ring of the Heavy Ion Research Facility in Lanzhou(HIRFL-CSR)was constructed to study nuclear physics,atomic physics,interdisciplinary science,and related applications.The External Target Facility(ETF)is located in the main ring of the HIRFL-CSR.The gamma detector of the ETF is built to measure emitted gamma rays with energies below 5 MeV in the center-of-mass frame and is planned to measure light fragments with energies up to 300 MeV.The readout electronics for the gamma detector were designed and commissioned.The readout electronics consist of thirty-two front-end cards,thirty-two readout control units(RCUs),one common readout unit,one synchronization & clock unit,and one sub-trigger unit.By using the real-time peak-detection algorithm implemented in the RCU,the data volume can be sig-nificantly reduced.In addition,trigger logic selection algorithms are implemented to improve the selection of useful events and reduce the data size.The test results show that the integral nonlinearity of the readout electronics is less than 1％,and the energy resolution for measuring the 60Co source is better than 5.5％.This study discusses the design and performance of the readout electronics.