Testing and analysis of the plastic scintillator units for LHAASO-ED

作     者：Ya-Ping Wang Chao Hou Xiang-Dong Sheng Shao-Hui Feng Hong-Kui Lv Jia Liu Jing Zhao Xiao-Peng Zhang Quan-Bu Gou 

作者机构：Key Laboratory of Particle Astrophyics&Experimental Physics Division&Computing CenterInstitute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of SciencesBeijing 100049China TIANFU Cosmic Ray Research CenterChengduSichuanChina 

出 版 物：《Radiation Detection Technology and Methods》 (辐射探测技术与方法（英文）)

年 卷 期：2021年第5卷第4期

页      面：513-519页

核心收录：

学科分类：082704[工学-辐射防护及环境保护] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Thiswork is supported byNationalKeyR&Dpro-gram of China under the grant 2018YFA0404201 by the National Nat-ural Science Foundation of China(Grant Nos.11805209,12022502) the Chinese Academy of Science,Institute of High Energy Physics 

主　　题：LHAASO ED Plastic scintillator unit Light output 

摘      要：Background A total of 5195 electromagnetic particle detectors(EDs)are used in the 1-square-kilometer extensive air shower array(KM2A),which is a subarray of the Large High Altitude Air Shower Observatory(LHAASO).Purpose As the detection sensitive medium of the EDs,more than 20,000 plastic scintillator units(BC-408),produced by Saint-Gobain,are used in *** is important to monitor the light output of the scintillator units among the *** To improve the efficiency,a sampling inspection scheme(misjudgment rate of less than 5%)was designed,and a batch test system was *** units of scintillator units can be measured at a *** test system selects the single muon events of cosmic rays to measure the light output values of the plastic scintillator *** The measurement has an uncertainty of less than 2%.By pretest calibration,the difference between different channels can be *** calibration was implemented approximately every 3 months,and the test system had been running stably for 28 *** measuring the ratio of the signals of selected far and near probe events,the changes in the quality of different batches of plastic scintillator units can be *** The test system realized accurate measurement of the light output,and all batches satisfied the requirements of the experiment.