Toward real-time digital pulse process algorithms for CsI(Tl)detector array at external target facility in HIRFL-CSR  

作　　者：Tao Liu Hai-Sheng Song Yu-Hong Yu Duo Yan Zhi-Yu Sun Shu-Wen Tang Fen-Hua Lu Shi-Tao Wang Xue-Heng Zhang Xian-Qin Li Hai-Bo Yang Fang Fang Yong-Jie Zhang Shao-Bo Ma Hooi-Jin Ong Cheng-Xin Zhao 

机构地区：[1]Northwest Normal University,Lanzhou 730070,China [2]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Nuclear Science and Techniques》2023年第9期8-20,共13页核技术（英文）

基　　金：supported by the Open Research Project of CAS Large Research Infrastructures;CAS Key Technology Talent Program;National Natural Science Foundations of China (Nos.U2031206 and 12273086)

摘　　要：A fully digital data acquisition system based on a field-programmable gate array(FPGA) was developed for a CsI(Tl) array at the external target facility(ETF) in the Heavy Ion Research Facility in Lanzhou(HIRFL). To process the CsI(Tl) signals generated by γ-rays and light-charged ions, a scheme for digital pulse processing algorithms is proposed. Every step in the algorithms was benchmarked using standard γ and α sources. The scheme, which included a moving average filter, baseline restoration, leading-edge discrimination, moving window deconvolution, and digital charge comparison, was subsequently implemented on the FPGA. A good energy resolution of 5.7% for 1.33-MeV γ-rays and excellent α-γ identification using the digital charge comparison method were achieved, which satisfies CsI(Tl) array performance requirements.

关 键 词：CsI(Tl)array On-line digital algorithms Moving average filter Moving window deconvolution On-line particle identification algorithms 

分 类 号：TL81[核科学技术—核技术及应用]