太阳风离子在月面的反射过程及对月面电场的影响

吉林大学学报(理学版) ›› 2018, Vol. 56 ›› Issue (6): 1513-1520.

太阳风离子在月面的反射过程及对月面电场的影响

刘沐明^1,2, 冯永勇¹

1. 中国科学院空间天气学国家重点实验室, 国家空间科学中心, 北京 100190；2. 中国科学院大学地球与行星科学学院, 北京 100049

收稿日期:2018-03-23 出版日期:2018-11-26 发布日期:2018-11-27
通讯作者: 冯永勇 E-mail:fengy y@nssc.ac.cn

Reflection of Solar Wind Ions on Lunar Surface andIts Influence on Lunar Surface Electric Field#br#

LIU Muming^1,2, FENG Yongyong¹

1. National Space Science Center, State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China;2. College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2018-03-23 Online:2018-11-26 Published:2018-11-27

摘要/Abstract

摘要： 为探究月表磁异常区对太阳风离子产生反射的原理, 基于嫦娥二号卫星携带太阳风离子探测器的探测数据, 用单粒子模拟法反演太阳风离子运动, 并分析离子入射角和反射角的分布. 实验结果表明：太阳风离子先被月壤向各方向大范围散射, 再被月面电场向天顶方向加速；太阳风中, 月面有45~75 V电势, 该正电势对月面反射的太阳风离子有显著影响.

关键词: 月表磁异常区, 月面电场, 离子散射, 单粒子模拟

Abstract: In order to explore the principle of reflection of solar wind ions on lunar magnetic anomaly area, based on the detection data of the solar wind ion detector carried by Chang’E2 satellite, we inverted the motion of the solar wind ions by using single particle simulation, and analyzed incidence angles and reflection angles. The experimental results show that the solar wind ions are firstly scattered by lunar regolith in all directions, then accelerated upward by lunar surface electric field. There is a positive potential of 45—75 V on dayside lunar surface in solar wind, which has a significant effect on the solar wind ions reflected
from the lunar surface.

Key words: lunar magnetic anomaly area, lunar surface electric , field, scattered ion, single particle simulation

中图分类号:

刘沐明, 冯永勇. 太阳风离子在月面的反射过程及对月面电场的影响[J]. 吉林大学学报(理学版), 2018, 56(6): 1513-1520.

LIU Muming, FENG Yongyong. Reflection of Solar Wind Ions on Lunar Surface andIts Influence on Lunar Surface Electric Field#br#[J]. Journal of Jilin University Science Edition, 2018, 56(6): 1513-1520.