LHAASO-MD光电倍增管的性能测试  

The Performance Test of LHAASO-MD Photomultiplier

作　　者：吴文雄 左雄 肖刚[2] 张毅[2] 贾焕玉[1] 王辉[1] Wu Wenxiong;Zuo Xiong;Xiao Gang;Zhang Yi;Jia Huanyu;Wang Hui(Southwest Jiaotong University,Chengdu 611756,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]西南交通大学,四川成都611756 [2]中国科学院高能物理研究所,北京100049

出　　处：《天文研究与技术》2020年第2期258-264,共7页Astronomical Research & Technology

基　　金：国家自然科学基金(11847307,11503021,11205126)资助.

摘　　要：高海拔宇宙线观测站(Large High Altitude Air Shower Observatory)的核心科学目标是探索高能宇宙线起源以及相关的宇宙演化、高能天体运动和新物理前沿的研究.通过大面积铺设μ子探测器极大地降低宇宙射线背景,从而提升高能伽马射线探测的灵敏度.作为μ子探测器的核心部件之一的光电倍增管负责接收水中的切伦科夫光子并将其转换成电信号输出,因此,光电倍增管的性能好坏直接影响μ子探测器的性能.稻城实验室2%抽样测试结果表明,光电倍增管的各性能达到μ子探测器的指标要求,与批量测试结果的相对偏差小于2%.Exploring the origins of high-energy cosmic rays and related cosmic evolution,high-energy celestial movements,and new physical frontiers is the uppermost scientific objective of the large high altitude air shower observatory(LHAASO).The large-area moun detector(MD)immensely reduces the background of cosmic ray,which can greatly enhance the sensitivity of high-energy gamma ray detection.A photomultiplier tube(PMT),one of the vital components of the MD,is responsible for receiving Cherenkov electrons in the water and converting it into an electrical signal output,which can directly affect the performance of MD.The metrical results of 2%samples from Daocheng Lab show that the performance of PMT meets the requirements of MD,and the relative deviation from the batch test results is less than 2%.

关 键 词：光电倍增管 高海拔宇宙线观测站 测试 

分 类 号：TN152[电子电信—物理电子学]