CsI(Tl)闪烁探测器脉冲形状鉴别最优积分条件的探究方法  

An exploration method of optimal integral conditions for pulse shape identification of CsI(Tl)scintillation detector

作　　者：刘玲[1] 王凤兰 孙晓慧 李鹏程 黄年伟 刘佳丽 刘顺菊 刘丝雨 吴茂盛 池铭璇 王建松 LIU Ling;WANG Fenglan;SUN Xiaohui;LI Pengcheng;HUANG Nianwei;LIU Jiali;LIU Shunju;LIU Siyu;WU Maosheng;CHI Mingxuan;WANG Jiansong(College of Physical Science and Technology,Shenyang Normal University,Shenyang 110034,China;School of Science,Huzhou University,Zhejiang Huzhou 313000,China;School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]沈阳师范大学物理科学与技术学院,沈阳110034 [2]湖州师范学院理学院,浙江湖州313000 [3]兰州大学核科学与技术学院,兰州730000

出　　处：《沈阳师范大学学报（自然科学版）》2023年第3期261-267,共7页Journal of Shenyang Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(11875297,U2032140,12205096);浙江省自然科学基金资助项目(LQ22A050001)。

摘　　要：介绍了脉冲波形分析中用电荷积分法鉴别带电粒子的方法,给出了CsI(Tl)脉冲波形粒子鉴别能力的评估方法。用VME(versa module eurocard)数据获取系统的电荷积分插件QDC和基于PXI(PCI extensions for Instrumentation)的XIA获取系统获取CsI(Tl)闪烁探测器的脉冲信号波形各有优缺点。相较于过去在实验中利用QDC电子学插件对闪烁体的脉冲波形做快、慢成分的在线积分处理,该研究在XIA获取系统采集的CsI(Tl)闪烁体真实脉冲波形基础上,利用ROOT数据分析软件,在离线数据处理过程中利用程序调整积分门的延迟和宽度,研究了积分门的延迟和宽度的变化对探测器粒子鉴别能力的影响。定义了一种简单、明了的判断方法,通过比较2种不同粒子在二维鉴别谱中的分布距离来判断在不同积分门延迟和宽度下粒子的鉴别能力并研究其变化规律,探究该方法的可行性,为以后采用电荷积分插件实验提供参考。The particle identification with charge integral method in pulse waveform analysis is introduced and the evaluation formula for the ability of CsI(Tl)particle identification by pulse waveform analysis is given in this paper.There are some advantages and disadvantages for VME(versa module eurocard)data acquisition system using charge integral electric module QDC and the XIA acquisition system based on PXI(PCI extensions for Instrumentation)by recording the full pulse waveform.Other than the usual way to integrate the charge of fast and slow components of the scintillator pulse waveform online using QDC in the experiment,at the present work,the delay and width of the integrating gate have been adjusted to study their effects on the ability of particle identification using the ROOT software in offline analysis based on the real pulse waveform of CsI(Tl)scintillator obtained by XIA data acquisition system.In order to estimate the ability of particle identification with different integrating gate and study the regularity,a concise formula is defined by comparison of the distance of the two kinds of particle on the two-dimension spectrum for particle identification,explore the feasibility of this method and provide reference for future experiments using charge integration plugins.

关 键 词：CsI(Tl)闪烁探测器 脉冲形状分析 带电粒子鉴别 积分法 

分 类 号：O571.1[理学—粒子物理与原子核物理]