Radiation dosimeter and charge detector onboard BeiDou navigation satellites in MEO

IF 0.5 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Open Astronomy Pub Date : 2023-01-01 DOI:10.1515/astro-2022-0205

Ying Sun, Shenyi Zhang, G. Shen, Lin Quan, Zheng Chang, Chao Tian, T. Jing, Huanxin Zhang, Jianjin Ding, B. Yuan, Binquan Zhang

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引用次数: 0

Abstract

Abstract The orbit of BeiDou satellite system is a very ideal space environment monitoring area. The radiation dosimeters are present on this series of navigation satellites, and they are respectively installed in the x, y and z positions. A charge detector installed in the satellite cabin is used for monitoring satellite deep charging potential. Radiation dosimeters select the 100 nm P-channel metal oxide semiconductor (PMOS) sensors, whose monitoring range can reach 2 × 106 rad (Si). In the circuit design part, the “zero temperature coefficient” current of the PMOS is used as the constant current source for measuring, which effectively reduces the influence of temperature effect. Three radiation dosimeters realize the daily dose change monitoring during the satellite’s operation, and the detection accuracy is high. The deep charging potential sensor adopts the equivalent capacitor design which is composed of the outer optical quartz glass and the inner circular gold-plate. The two kinds of detection instruments have the characteristics of small volume, low power consumption and high detection accuracy. The detection results show that they have important application value for space environment prediction and guarantee.

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MEO北斗导航卫星上的辐射剂量计和电荷探测器

摘要:北斗卫星系统的轨道是一个非常理想的空间环境监测区域。辐射剂量计安装在这一系列导航卫星上，它们分别安装在x、y和z位置。安装在卫星舱内的电荷探测器用于监测卫星深充电电位。辐射剂量计选用100 nm p通道金属氧化物半导体(PMOS)传感器，其监测范围可达2 × 106 rad (Si)。在电路设计部分，采用PMOS的“零温度系数”电流作为恒流源进行测量，有效降低了温度效应的影响。三个辐射剂量仪实现了卫星运行期间的日剂量变化监测，检测精度高。深充电位传感器采用等效电容设计，其外部为光学石英玻璃，内部为圆形金板。两种检测仪器具有体积小、功耗低、检测精度高等特点。检测结果表明，对空间环境预测和保障具有重要的应用价值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Open Astronomy Physics and Astronomy-Astronomy and Astrophysics

CiteScore

1.30

自引率

14.30%

发文量

审稿时长

16 weeks

期刊介绍： The journal disseminates research in both observational and theoretical astronomy, astrophysics, solar physics, cosmology, galactic and extragalactic astronomy, high energy particles physics, planetary science, space science and astronomy-related astrobiology, presenting as well the surveys dedicated to astronomical history and education.