DOI: 10.1002/2015GL067300
论文题名: Contribution of ion reflection to the energy budgets of dipolarization fronts
作者: Li J.-Z. ; Zhou X.-Z. ; Angelopoulos V. ; Liu J. ; Runov A. ; Pan D.-X. ; Zong Q.-G.
刊名: Geophysical Research Letters
ISSN: 0094-9480
EISSN: 1944-9211
出版年: 2016
卷: 43, 期: 2 起始页码: 493
结束页码: 500
语种: 英语
英文关键词: current carrier
; dipolarization fronts
; energy conversion
; ion acceleration
; ion reflection
Scopus关键词: Boundary layers
; Budget control
; Electromagnetic waves
; Energy conversion
; Plasma sheaths
; Ambient plasmas
; Current carriers
; Dipolarization
; Earth's magnetotail
; Energy conversion rates
; Ion accelerations
; Ion energy enhancement
; Particle acceleration
; Ions
; acceleration
; boundary layer
; energy budget
; front
; heating
; magnetic field
; magnetotail
; plasma
; reflectivity
英文摘要: Dipolarization fronts, earthward propagating structures in the Earth's magnetotail characterized by sharp enhancements of the northward magnetic field, are important sites of energy conversion from electromagnetic to particle energy. The large energy conversion rate observed at these fronts suggests significant particle acceleration and heating, which powers the ambient current sheet to generate plasma flows in the magnetotail plasma sheet and its boundary layer. Using a simple model of ion reflection at the dipolarization front, we estimate ion energy enhancement in the ambient plasma sheet and find it to be comparable with typical electromagnetic energy converted at the front. Validated by dipolarization front statistics from THEMIS (Time History of Events and Macroscale Interactions during Substorms) observations, this result suggests the important contribution of ion reflection to the energy budgets of dipolarization fronts during their earthward propagation. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84958036672&doi=10.1002%2f2015GL067300&partnerID=40&md5=6bb52a379fb8bb6da1bb83dd83de8cbd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10443
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: School of Earth and Space Sciences, Peking University, Beijing, China
Recommended Citation:
Li J.-Z.,Zhou X.-Z.,Angelopoulos V.,et al. Contribution of ion reflection to the energy budgets of dipolarization fronts[J]. Geophysical Research Letters,2016-01-01,43(2).