Simulation and photoelectron track reconstruction of soft X-ray polarimeter  

作　　者：Xue-Feng Huang Hong-Bang Liu Jin Zhang Bo Huang Wen-Jin Xie Huan-Bo Feng Xi-Chen Cai Xi-Wen Liu Zi-Li Li Jian-Yu Gu Qian Liu Jin Li En-Wei Liang 

机构地区：[1]Guangxi Key Laboratory for Relativistic Astrophysics,School of Physical Science and Technology,Guangxi University,Nanning 530004,China [2]PLAC,Key Laboratory of Quark and Lepton Physics(MOE),Central China Normal University,Wuhan 430079,China [3]School of Physical Science,University of Chinese Academy of Sciences,Beijing 100049,China [4]Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Nuclear Science and Techniques》2021年第7期1-10,共10页核技术（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.U1731239,12027803,11851304,U1938201,11575193,and U1732266);the Guangxi Science Foundation(Nos.2018GXNSFGA281007,2017AD22006,2018JJA110048);Key Research Program of Frontier Sciences,CAS(No.QYZDB-SSW368 SLH039)。

摘　　要：The soft X-ray polarimeter(SXP)is a detector with a wide energy range,large area,and large field of view.A SXP will be mounted on the Chinese Space Station and will mainly focus on detecting the polarization of transient soft X-ray(2–10 keV)sources,especially gamma-ray bursts(GRBs).In this work,a polarimeter detector unit is taken as an example,and Geant4 and Garfield++software are used to simulate the detection efficiency and track production.An improved track reconstruction algorithm is proposed and used to reconstruct two-dimensional images of the tracks.In this method,the initial emission angle of photoelectrons is reconstructed from the initial part of the track by shortening or extending the initial part of the track until the remaining track is straight,and the number of pixels is within an adjustable threshold.The modulation factor of the photoelectronic tracks after reconstruction reaches approximately 57%in the photon energy range of 7–10 keV.

关 键 词：X-RAY POLARIMETRY Track reconstruction algorithm 

分 类 号：O434.19[机械工程—光学工程]