Wolter-Ⅰ型X射线脉冲星探测器的空间环境本底分析  

Estimation of space radiation background of Wolter-ⅠX-ray pulsar detector

作　　者：刘金胜 王博 宋娟 王文丛 李璟璟 徐振华 LIU Jinsheng;WANG Bo;SONG Juan;WANG Wencong;LI Jingjing;XU Zhenhua(Shandong Institute of Space Electronic Technology,Yantai 264670,China)

机构地区：[1]山东航天电子技术研究所,烟台264670

出　　处：《航空学报》2023年第3期149-157,共9页Acta Aeronautica et Astronautica Sinica

基　　金：装备重大基础研究项目(514010204-301-3)。

摘　　要：X射线脉冲星导航具有自主性强、抗干扰、安全性高等特点。针对X射线脉冲星辐射信号的探测与识别介绍了一款Wolter-Ⅰ型X射线脉冲星探测器。为评估探测器的性能、提升灵敏度,对该Wolter-Ⅰ型X射线脉冲星探测器开展了蒙特卡罗(MC)模拟研究。首先基于空间环境信息系统(SPENVIS)平台给出运行轨道中不同种类带电粒子的分布与能谱特征;然后采用GEANT4软件构建了Wolter-Ⅰ型X射线脉冲星探测器的质量模型,模拟了探测器对电子、质子及氦等带电粒子的响应;最后以遮光膜参数优化为例说明探测器优化方式,并给出优化后探测器在700 km地球圆轨道上的空间环境本底。结果表明优化后探测器的空间环境本底为30.68 cts·s-1。X-ray pulsar navigation has the characteristics of autonomy,anti-interference,security,etc.For the detection and recognition of X-rays pulsar signals,a new kind of Wolter-ⅠX-ray pulsar detector is introduced.To evaluate the performance of the detector and improve its sensitivity,the Wolter-ⅠX-ray pulsar detector is analyzed through Monte Carlo(MC)simulations.Firstly,based on the Space Environment Information System(SPENVIS),the distribution and spectrum of various particles in the space radiation environment are be obtained.Secondly,the physical model of the Wolter-ⅠX-ray pulsar detector is built in GEANT4,and the response of the detector to the particles including electrons,protons and helium is shown.Finally,taking the shading film of the detector as an example,the optimization method of detector is illustrated.The space radiation background of the optimized Wolter-ⅠX-ray pulsar detector in 700 km on earth circular orbit is acquired.The simulation results show that the space radiation background of the optimized detector is 30.68 cts·s-1.

关 键 词：脉冲星导航 X射线探测器 Wolter-Ⅰ型 蒙特卡罗模拟 本底估算 

分 类 号：V11[航空宇航科学与技术—人机与环境工程] V448