A low-energy ion spectrometer with large field of view and wide energy range onboard a Chinese GEO satellite

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-2022-0210

X. Shan, Bin Miao, Z. Cao, Zhenyu Sun, Yiren Li, K. Liu, Sanbiao Qu, Xingyu Guo, Z. Su, C. Shen, Z. Pan, Xin Li, X. Hao, Xiaoping Yang, Chao Tian, Yu Jiang, Shubin Liu, Q. An, Xiangjun Chen, Yuming Wang

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引用次数: 1

Abstract

Abstract A low-energy ion spectrometer (LEIS), onboard a Chinese navigation satellite in geosynchronous orbit, is one of the primary instruments for plasma detection. The LEIS is implemented by combining a top-hat electrostatic analyzer with a pair of angular scanning deflectors, which enables us to achieve in situ measurement of energetic ions in three-dimensional (3D) space with a large field of view of 360° × 90° and a wide energy range from 50 eV to 25 keV per charge. The key performance parameters including analyzer constant, geometric factor, linear relation function between elevation angles and deflector voltages, and the energy or angular resolutions have been determined by using detailed simulations and calibration experiments on the ground. The preliminary results from on-orbit observations demonstrate that the capability of the present LEIS payload can well meet the mission requirements for sampling the low-energy ion distributions in 3D space, measuring the negative satellite surface potential, and monitoring the magnetospheric storm or substorm activities.

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中国GEO卫星大视场宽能量低能量离子谱仪

摘要中国地球同步轨道导航卫星搭载的低能离子光谱仪是等离子体探测的主要仪器之一。LEIS是通过将顶帽静电分析仪与一对角扫描偏转器相结合来实现的，这使我们能够在360°×90°的大视场和50eV-25的宽能量范围的三维（3D）空间中实现对高能离子的原位测量 keV。通过详细的地面模拟和校准实验，确定了分析仪常数、几何因子、仰角和偏转器电压之间的线性关系函数以及能量或角度分辨率等关键性能参数。在轨观测的初步结果表明，现有LEIS有效载荷的能力能够很好地满足对三维空间低能离子分布进行采样、测量卫星表面负电位以及监测磁层风暴或亚暴活动的任务要求。

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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.