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Bursts of energetic electron induced large surface charging observed by Chang'E-1
Wang, X. Y.; Zhang, A. B.; Zhang, X. G.; Reme, H.; Kong, L. G.; Zhang, S. Y.; Yu, D. J.; Wang, S. J.; Zhu, G. W.; Wang, XY (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China.
Department空间环境部
Source PublicationPLANETARY AND SPACE SCIENCE
2012
Volume71Issue:1Pages:1-8
ISSN0032-0633
Language英语
KeywordMoon Solar Wind Magnetosheath Plasma Bursts Of Energetic Electrons Surface Charging
AbstractA relationship between surface charging and bursts of energetic electron (BEE) event is presented in this paper. In a 200 km lunar polar orbit, during quiet time, 0.1-2.0 MeV BEE events were observed by High Energetic Particles Detectors (HPD) on board Chang'E-1, on December 22, 2007, when the spacecraft was within the inner terrestrial magnetosheath. At the same time, a large surface charging of similar to -5.4 kV was observed by Chang'E-1, which was evidenced by increasing the ions energy observed by Solar Wind Ion Detectors (SWIDs). We found that the surface charging is strongly correlated with BEE events, and the potentials of spacecraft surface charging was experientially expressed as U approximate to 3.6 x 10(-5).fr (kv). The BEE events did occur in the solar wind, geomagnetic tail and magnetosheath alternately, whereas the surface charging during the BEE events is in the magnetosheath or transition region of boundaries. Though the observed surface charging was fewer than the BEE events, it is expected that the occurrence of the charging events caused by the bursts of energetic electrons should be more frequent than the Chang'E-1 observations. Meanwhile, the spacecraft charging indicates the lunar surface can be charged to negative kilovolt-scale by the BEE events even in quiet times. (C) 2012 Elsevier Ltd. All rights reserved.; A relationship between surface charging and bursts of energetic electron (BEE) event is presented in this paper. In a 200 km lunar polar orbit, during quiet time, 0.1-2.0 MeV BEE events were observed by High Energetic Particles Detectors (HPD) on board Chang'E-1, on December 22, 2007, when the spacecraft was within the inner terrestrial magnetosheath. At the same time, a large surface charging of similar to -5.4 kV was observed by Chang'E-1, which was evidenced by increasing the ions energy observed by Solar Wind Ion Detectors (SWIDs). We found that the surface charging is strongly correlated with BEE events, and the potentials of spacecraft surface charging was experientially expressed as U approximate to 3.6 x 10(-5).fr (kv). The BEE events did occur in the solar wind, geomagnetic tail and magnetosheath alternately, whereas the surface charging during the BEE events is in the magnetosheath or transition region of boundaries. Though the observed surface charging was fewer than the BEE events, it is expected that the occurrence of the charging events caused by the bursts of energetic electrons should be more frequent than the Chang'E-1 observations. Meanwhile, the spacecraft charging indicates the lunar surface can be charged to negative kilovolt-scale by the BEE events even in quiet times. (C) 2012 Elsevier Ltd. All rights reserved.
Indexed BySCI ; EI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/2912
Collection空间环境部
Corresponding AuthorWang, XY (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Wang, X. Y.,Zhang, A. B.,Zhang, X. G.,et al. Bursts of energetic electron induced large surface charging observed by Chang'E-1[J]. PLANETARY AND SPACE SCIENCE,2012,71(1):1-8.
APA Wang, X. Y..,Zhang, A. B..,Zhang, X. G..,Reme, H..,Kong, L. G..,...&Wang, XY .(2012).Bursts of energetic electron induced large surface charging observed by Chang'E-1.PLANETARY AND SPACE SCIENCE,71(1),1-8.
MLA Wang, X. Y.,et al."Bursts of energetic electron induced large surface charging observed by Chang'E-1".PLANETARY AND SPACE SCIENCE 71.1(2012):1-8.
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