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

• Published in: 核技术（英文版） Vol. 34; no. 9; pp. 8 - 20
• Main Authors: 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
• Format: Journal Article
• Language: English
• Published: University of Chinese Academy of Sciences,Beijing 100049,China%Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China 2023; Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China%Northwest Normal University,Lanzhou 730070,China%Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China; Northwest Normal University,Lanzhou 730070,China
• Subjects: CsI(Tl)array; Moving average filter; On-line particle identification algorithms; On-line digital algorithms; Moving window deconvolution
• ISSN: 1001-8042
• DOI: 10.1007/s41365-023-01272-6

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 y-rays and light-charged ions,a scheme for digital pulse processing algorithms is proposed.Every step in the algorithms was benchmarked using standard y 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.