Field-Aligned Electrons in Polar Region Observed by Cluster on 30 September 2001

	Field-Aligned Electrons in Polar Region Observed by Cluster on 30 September 2001
	Zhang Zi-Ying; Shi Jian-Kui; Cheng Zheng-Wei; Fazakerley, Andrew
刊名	CHINESE PHYSICS LETTERS
	2012
卷号	29 期号:9 页码:99401
ISSN号	0256-307X
通讯作者	Zhang, ZY (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.
中文摘要	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.
英文摘要	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.
学科主题	空间物理
收录类别	SCI
资助信息	National Natural Science Foundation of China [41074114, 40804031, 40921063]; Specialized Research Fund for State Key Laboratory in China
语种	英语
公开日期	2014-12-15
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/3094]
专题	国家空间科学中心_空间科学部
推荐引用方式 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.(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.