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| Simulation of Lunar Surface Charging Based on SPIS |
| Received:August 31, 2019 Revised:October 01, 2019 |
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| DOI：10.7643/issn.1672-9242.2020.03.006 |
| KeyWord:moon surface charging space plasma |
| Author | Institution |
| LAO Chuan-qi |
Hebei University of Technology, Tianjin , China |
| ZHANG Hui |
Hebei University of Technology, Tianjin , China |
| CAI Ming-hui |
National Space Science Center, Chinese Academy of Sciences, Beijing , China;School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing , China |
| HAN Jian-wei |
National Space Science Center, Chinese Academy of Sciences, Beijing , China;School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing , China |
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| Abstract: |
| The paper aims to study the situation of spacecraft surface charging and discharging under different plasma environments on the lunar surface. The SPIS software developed by ESA was used to model and simulate. By analyzing the types and sizes of surface currents, the general charging and discharging laws in different environments were obtained. There was a risk of surface charging for the lunar surface probe. The surface charging potentials of the magnetic sheath, magnetic tail lobe, plasma sheet and solar wind were significantly different under four different typical plasma environments, and the charging potentials at the junction were gradually changed with uneven distribution. The surface charging potential range was about -1784 to142 V. Illumination conditions can significantly affect the surface potential of the detector, and the charging potential in special areas will be affected by the new small-scale plasma environment formed by charging and discharging effects in adjacent areas. |
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