Method of Separating Cosmic-Ray Positrons from Electrons in the DAMPE Experiment  

作　　者：Hao-Ting Dai Jing-Jing Zang Ying Wang Chuan-Ning Luo Yun-Long Zhang Zhi-Yong Zhang Yi-Feng Wei Li-Bo Wu Cheng-Ming Liu Cong Zhao Xiao-Lian Wang Zi-Zong Xu Guang-Shun Huang 

机构地区：[1]State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China,Hefei 230026,China [2]Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China [3]School of Physics and Electronic Engineering,Linyi University,Linyi 276000,China [4]Key Laboratory of Dark Matter and Space Astronomy,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China [5]Gran Sasso Science Institute (GSSI)

出　　处：《Research in Astronomy and Astrophysics》2022年第3期115-121,共7页天文和天体物理学研究（英文版）

基　　金：supported by the Outstanding Youth Science Foundation of NSFC(Grant No.12022503);the Joint Funds of the National Natural Science Foundation of China(Grant Nos.U1738208,U1738139,U1738135 and U1738207);the National Natural Science Foundation of China(Grant Nos.11673021,11705197,11773085 and 11851302);the National Key Research and Development Program of China(Grant No.2016YFA0400200);Youth Innovation Promotion Association CAS(Grant No.2021450)。

摘　　要：A method of identifying positron/electron species from the cosmic rays was studied in the DArk Matter Particle Explorer(DAMPE)experiment.As there is no onboard magnet on the satellite,the different features imposed by the geomagnetic field on these two species were exploited for the particle identification.Application of this method to the simulation of on-orbit electrons/positrons/protons and the real flight data proves that separately measuring the CR positrons/electrons with DAMPE is feasible,though limited by the field of view for the present observation data.Further analysis on the positron flux with this method can be expected in the future.

关 键 词：(ISM:)cosmic rays magnetic fields (cosmology:)dark matter 

分 类 号：P172.4[天文地球—天文学]