应用于PandaX-Ⅲ实验探测器测试平台的Bulk Micromegas性能研究  

Research on Performance of Bulk Micromegas Applied to PandaX-Ⅲ Experiment Detector Test Platform

作　　者：陈雷 李沛玉 周静[1] 赵明锐 智宇 刘雯迪 贾世海 张昀昱 胡守扬[1] 于伟翔[1] 李笑梅[1] CHEN Lei;LI Peiyu;ZHOU Jing;ZHAO Mingrui;ZHI Yu;LIU Wendi;JIA Shihai;ZHANG Yunyu;HU Shouyang;YU Weixiang;LI Xiaomei(Key Laboratory of Nuclear Data,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院核数据重点实验室,北京102413

出　　处：《原子能科学技术》2020年第6期1061-1067,共7页Atomic Energy Science and Technology

基　　金：国家财政部稳定支持研究经费资助项目(WDJC-2019-16);国家重点研发计划资助项目(2018YFE0104800 ,2016YFA0400300,2016YFE0100900);国家自然科学基金资助项目(11775313)。

摘　　要：探测无中微子双贝塔衰变的PandaX-Ⅲ实验需要一个能同时对多个Micromegas探测器的增益、能量分辨、坏道分布、位置分辨等性能参数进行测试的平台,为此中国原子能科学研究院建立了PandaX-Ⅲ实验探测器测试平台.本文采用由光蚀刻技术制作的Bulk Micromegas对该测试平台进行研究:利用55Fe放射源在Ar+10%CO2的流气情况下,使用基于AGET读出芯片制作的通用读出电子学进行数据采集;运用C++与ROOT软件库编写相应的后端数据分析软件,并对数据进行了分析.测试结果表明,PandaX-Ⅲ实验探测器测试平台各系统工作状态良好,应用于测试平台的Bulk Micromegas探测器具有良好的信噪比,X射线成像效果清晰,对5.9 keVX射线的能量分辨率为19.7%.Searching for 0 NUDBD(neutrinoless double beta decay) is the physics motivation of PandaX-Ⅲ Experiment, which requires a platform to test many parameters of Micromegas at the same time including gain, energy resolution, bad channel distribution and position resolution, etc. For this reason, China Institute of Atomic Energy(CIAE) established PandaX-Ⅲ Experiment detector test platform. In this paper, Bulk Micromegas was used to the test platform for evaluation. Data were acquired by AGET readout electronics using 55Fe X-ray source under condition of flowing gas Ar+10%CO2. Afterwards, the data were analyzed by backend software program written in C++ and ROOT library, and the data analysis program ran smoothly. Bulk Micromegas detector shows good signal/noise ratio, and the clear X-ray images with energy resolution of 19.7% under 5.9 keV X-ray are obtained.

关 键 词：PandaX-Ⅲ实验 Bulk Micromegas探测器 增益 能量分辨 测试平台 

分 类 号：O572.21[理学—粒子物理与原子核物理]