Discriminating cosmic muons and X-rays based on rise time using a GEM detector  

作　　者：吴会寅 赵圣鹰 王晓冬 章先鸣 祁辉荣 张伟 吴柯岩 胡碧涛 张毅 

机构地区：[1]School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China [2]School of Nuclear Science and Technology, University of South China, Hengyang 421001, China [3]State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China

出　　处：《Chinese Physics C》2016年第8期72-75,共4页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11135002,11275235,11405077,11575073)

摘　　要：Gas electron multiplier （GEM） detectors have been used in cosmic muon scattering tomography and neutron imaging over the last decade. In this work, a triple GEM device with an effective readout area of 10 cm × 10 cm is developed, and a method of discriminating between cosmic muons and X-rays based on rise time is tested. The energy resolution of the GEM detector is tested by 55Fe ray source to prove the GEM detector has a good performance. Analysis of the complete signal-cycles allows us to get the rise time and pulse heights. The experiment result indicates that cosmic muons and X-rays can be discriminated with an appropriate rise time threshold.Gas electron multiplier （GEM） detectors have been used in cosmic muon scattering tomography and neutron imaging over the last decade. In this work, a triple GEM device with an effective readout area of 10 cm × 10 cm is developed, and a method of discriminating between cosmic muons and X-rays based on rise time is tested. The energy resolution of the GEM detector is tested by 55Fe ray source to prove the GEM detector has a good performance. Analysis of the complete signal-cycles allows us to get the rise time and pulse heights. The experiment result indicates that cosmic muons and X-rays can be discriminated with an appropriate rise time threshold.

关 键 词：gas electron multiplier cosmic muon X-RAY rising time DISCRIMINATION 

分 类 号：O572.212[理学—粒子物理与原子核物理]