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Field-Aligned Electrons in Polar Region Observed by Cluster on 30 September 2001
Zhang Zi-Ying; Shi Jian-Kui; Cheng Zheng-Wei; Fazakerley, Andrew; Zhang, ZY (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Department空间科学部
Source PublicationCHINESE PHYSICS LETTERS
2012
Volume29Issue:9Pages:99401
ISSN0256-307X
Language英语
AbstractThe physical process in the Earth's polar region is very complex and still needs to be further studied. Using the data from Cluster satellite measurement, an analysis on field-aligned electrons in the mid-latitude cusp on 30 September 2001 has been performed. The satellite observed a down-flowing electron event in the low-latitude boundary and a sequential up-flowing electron event in the high-latitude boundary of the cusp region. The down-flowing electron had a velocity as high as 500 km/s and a flux of 2.0 x 10(9) cm(-2).s(-1). The up-flowing electron had a velocity up to 1200 km/s and a flux of 4.9 x 10(9) cm(-2).s(-1). Both the velocity and the flux observed in this event are the maximum values of the up-flowing electrons observed by all satellites to date. The electron is the main contributor for the field-aligned current in this event. The physical mechanism is also discussed. The down-flowing electron in the low-latitude boundary of the cusp region may result from solar wind injecting during the southward IMF, and the up-flowing electrons in the high-latitude boundary of cusp may result from mirroring of the solar wind, or from the ionospheric up-flowing electrons which have been accelerated.; The physical process in the Earth's polar region is very complex and still needs to be further studied. Using the data from Cluster satellite measurement, an analysis on field-aligned electrons in the mid-latitude cusp on 30 September 2001 has been performed. The satellite observed a down-flowing electron event in the low-latitude boundary and a sequential up-flowing electron event in the high-latitude boundary of the cusp region. The down-flowing electron had a velocity as high as 500 km/s and a flux of 2.0 x 10(9) cm(-2).s(-1). The up-flowing electron had a velocity up to 1200 km/s and a flux of 4.9 x 10(9) cm(-2).s(-1). Both the velocity and the flux observed in this event are the maximum values of the up-flowing electrons observed by all satellites to date. The electron is the main contributor for the field-aligned current in this event. The physical mechanism is also discussed. The down-flowing electron in the low-latitude boundary of the cusp region may result from solar wind injecting during the southward IMF, and the up-flowing electrons in the high-latitude boundary of cusp may result from mirroring of the solar wind, or from the ionospheric up-flowing electrons which have been accelerated.
Indexed BySCI
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/122/3094
Collection空间科学部
Corresponding AuthorZhang, ZY (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Zhang Zi-Ying,Shi Jian-Kui,Cheng Zheng-Wei,et al. Field-Aligned Electrons in Polar Region Observed by Cluster on 30 September 2001[J]. CHINESE PHYSICS LETTERS,2012,29(9):99401.
APA Zhang Zi-Ying,Shi Jian-Kui,Cheng Zheng-Wei,Fazakerley, Andrew,&Zhang, ZY .(2012).Field-Aligned Electrons in Polar Region Observed by Cluster on 30 September 2001.CHINESE PHYSICS LETTERS,29(9),99401.
MLA Zhang Zi-Ying,et al."Field-Aligned Electrons in Polar Region Observed by Cluster on 30 September 2001".CHINESE PHYSICS LETTERS 29.9(2012):99401.
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