The role of electrons during chorus intensification: Energy source and energy loss

	The role of electrons during chorus intensification: Energy source and energy loss
	Fu, H. S.; Cao, J. B.; Zong, Q-G.; Lu, H. Y.; Huang, S. Y.; Wei, X. H.; Ma, Y. D.
刊名	JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
	2012
卷号	80 页码:37-47
关键词	Chorus intensification Betatron acceleration Pitch-angle diffusion Interplanetary shock
ISSN号	1364-6826
通讯作者	Fu, HS (reprint author), Swedish Inst Space Phys, Uppsala, Sweden.
中文摘要	The role of electrons during the shock-induced chorus intensification observed by THEMIS D on 19 November 2007 is investigated in detail. First, the electrons are accelerated through the local betatron acceleration and radial diffusion, which are primarily in the perpendicular direction and result in the positive anisotropy (T-perpendicular to > T-//) of electrons; then they are scattered through the pitch-angle diffusion, during which the electron energies are partially transferred to amplify the chorus. In the case of interest, the energy loss is more efficient for the lower-energy (15 key) electrons because they have larger density gradient along the diffusion curves. The energetic electrons act as the intermediate in this scenario. They transfer the energies carried by the interplanetary shock to the chorus. The energetic electrons injected from magnetotail are not observed; they have no contributions to the energy source in this event. (C) 2012 Elsevier Ltd. All rights reserved.
英文摘要	The role of electrons during the shock-induced chorus intensification observed by THEMIS D on 19 November 2007 is investigated in detail. First, the electrons are accelerated through the local betatron acceleration and radial diffusion, which are primarily in the perpendicular direction and result in the positive anisotropy (T-perpendicular to > T-//) of electrons; then they are scattered through the pitch-angle diffusion, during which the electron energies are partially transferred to amplify the chorus. In the case of interest, the energy loss is more efficient for the lower-energy (15 key) electrons because they have larger density gradient along the diffusion curves. The energetic electrons act as the intermediate in this scenario. They transfer the energies carried by the interplanetary shock to the chorus. The energetic electrons injected from magnetotail are not observed; they have no contributions to the energy source in this event. (C) 2012 Elsevier Ltd. All rights reserved.
学科主题	空间物理
收录类别	SCI
资助信息	NSFC [40931054, 40804045, 41174144]; 973 program [2011CB811404]
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/122/3288]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Fu, H. S.,Cao, J. B.,Zong, Q-G.,et al. The role of electrons during chorus intensification: Energy source and energy loss[J]. JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS,2012,80:37-47.
APA	Fu, H. S..,Cao, J. B..,Zong, Q-G..,Lu, H. Y..,Huang, S. Y..,...&Ma, Y. D..(2012).The role of electrons during chorus intensification: Energy source and energy loss.JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS,80,37-47.
MLA	Fu, H. S.,et al."The role of electrons during chorus intensification: Energy source and energy loss".JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS 80(2012):37-47.