基于数字化的通用获取系统及波形分析算法  

A general-purpose data acquisition system and a waveform analysis algorithm based on digitization

作　　者：吴鸿毅[1] 李智焕[1] 吴婧 华辉[1] 王翔[1] 李湘庆[1] 徐川[1] Hongyi Wu;Zhihuan Li;Jing Wu;Hui Hua;Xiang Wang;Xiangqing Li;Chuan Xu(State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,China)

机构地区：[1]北京大学物理学院,核物理与核技术国家重点实验室,北京100871

出　　处：《科学通报》2021年第27期3553-3560,共8页Chinese Science Bulletin

基　　金：国家重点研发计划(2018YFA0404403);国家自然科学基金(12035001,12075006,11675003);北京大学核物理与核技术国家重点实验室开放课题(NPT2020KFY18)资助。

摘　　要：随着核物理实验研究对象向远离稳定性核区拓展,传统的模拟电子学获取系统已经无法满足短寿命、低产额、高本底实验的需求.近年来,数字化获取系统在核物理研究中得到了广泛应用,并显示出相对于模拟电子学系统的显著优势.本文介绍了北京大学实验核物理组近年来开发的一套通用数字化获取系统及波形分析算法.该获取系统已经成功应用于中国原子能科学研究院、中国科学院近代物理研究所、中国科学院高能物理研究所东莞研究部、南非iThemba LABS等国内外单位的实验终端上开展的多个实验中,取得了很好的效果.Given that the nuclei studied in the nuclear physics experiments are expanding away from the stable nuclear region,traditional analog electronics acquisition systems cannot satisfy the requirements of experiments that involve short-lived,low-yield nucleus productions under high background.In recent years,digital data acquisition systems have shown significant advantages over the analog electronics system and have been widely used in nuclear physics research such as studies of short-lived charged particle emitters which involve overlapping ion-particle or particle-particle signals,and studies of sub-microsecond isomers observed in fragmentation reactions.A general-purpose digital data acquisition system and a dedicated waveform analysis algorithm recently developed by the Group of Experimental Nuclear Physics,Peking University are introduced in this paper.This digital data acquisition system which is composed of 16-channel digital pulse processor Pixie-16 modules from XIA LLC is a versatile,flexible,and expandable data acquisition system designed for nuclear physics research.Although the triggerless mode,which records all live events without event selection,provides an attractive option for users because it has great flexibility for offline data analysis,it generates significant data streams in the experiments with high counting rates,which may then exceed the digital data acquisition system’s I/O capability.Therefore,a flexible trigger system based on the field programmable gate array has been developed to accommodate different experimental needs.The trigger system is configured through the hardware description language(VDHL/verilog),which can set up and debug different experiment logics conveniently.Many offline analysis tools have been developed to help users quickly optimize parameters for various types of detectors without time-consuming tests and measurements.A comparison between this digital data acquisition system and the conventional analog data acquisition system has been made.At a low count rate,both

关 键 词：数字化获取系统 触发 参数优化 波形分析 

分 类 号：O571[理学—粒子物理与原子核物理]