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

被引：0

作者：

Liu J. ^{[1
]}

Wang B. ^{[1
]}

Song J. ^{[1
]}

Wang W. ^{[1
]}

Li J. ^{[1
]}

Xu Z. ^{[1
]}

机构：

[1] Shandong Institute of Space Electronic Technology, Yantai

来源：

Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2023年 / 44卷 / 03期

关键词：

background estimation; Monte Carlo simulation; pulsar navigation; Wolter-I; X-ray detector;

D O I：

10.7527/S1000-6893.2022.26599

中图分类号：

学科分类号：

摘要：

X-ray pulsar navigation has the characteristics of autonomy，anti-interference，security，etc. For the detec⁃ tion and recognition of X-rays pulsar signals，a new kind of Wolter-I X-ray pulsar detector is introduced. To evaluate the performance of the detector and improve its sensitivity，the Wolter-I X-ray pulsar detector is analyzed through Monte Carlo（MC）simulations. Firstly，based on the Space Environment Information System（SPENVIS），the distri⁃ bution and spectrum of various particles in the space radiation environment are be obtained. Secondly，the physical model of the Wolter-I X-ray pulsar detector is built in GEANT4，and the response of the detector to the particles includ⁃ ing electrons，protons and helium is shown. Finally，taking the shading film of the detector as an example，the optimi⁃ zation method of detector is illustrated. The space radiation background of the optimized Wolter-I X-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 © 2023 AAAS Press of Chinese Society of Aeronautics and Astronautics. All rights reserved.

引用

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