Antiproton identification below threshold with the AMS-02 RICH detector
Antiproton identification below threshold with the AMS-02 RICH detector作者机构:School of Physics Sun Yat-Sen University Guangdong 510275 China Institute of Physics Academia Sinica Taipei 11529 China Centro de Investigaciones Energeticas Mediambientales y Tecnologicas (CIEMAT) Madrid E-28040 Spain Physics and Astronomy Department University of Hawaii Hawaii 96822 USA
出 版 物:《Chinese Physics C》 (中国物理C(英文版))
年 卷 期:2017年第41卷第5期
页 面:158-163页
核心收录:
学科分类:0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0804[工学-仪器科学与技术] 0827[工学-核科学与技术] 0703[理学-化学] 0704[理学-天文学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学]
基 金:Supported by China Scholarship Council(CSC)under Grant No.201306380027
主 题:RICH cosmic goals isotopes rejection specialized contamination maximize installed suppressed
摘 要:The Alpha Magnetic Spectrometer(AMS-02),which is installed on the International Space Station(ISS),has been collecting data successfully since May *** main goals of AMS-02 are the search for cosmic anti-matter,dark matter and the precise measurement of the relative abundance of elements and isotopes in galactic cosmic *** order to identify particle properties,AMS-02 includes several specialized *** these,the AMS-02 Ring Imaging Cherenkov detector(RICH) is designed to provide a very precise measurement of the velocity and electric charge of *** describe a method to reject the dominant electron background in antiproton identification with the use of the AMS-02 RICH detector as a veto for rigidities below 3 GV.A ray tracing integration method is used to maximize the statistics of with the lowest possible e background,providing 4 times rejection power gain for e background with respect to only 3% of signal efficiency *** using the collected cosmic-ray data,e contamination can be well suppressed within 3% with β ≈ 1,while keeping 76% efficiency for below the threshold.