DOI: 10.1002/2013GL058982
论文题名: Low-altitude electron acceleration due to multiple flow bursts in the magnetotail
作者: Nakamura R. ; Karlsson T. ; Hamrin M. ; Nilsson H. ; Marghitu O. ; Amm O. ; Bunescu C. ; Constantinescu V. ; Frey H.U. ; Keiling A. ; Semeter J. ; Sorbalo E. ; Vogt J. ; Forsyth C. ; Kubyshkina M.V.
刊名: Geophysical Research Letters
ISSN: 0094-10407
EISSN: 1944-10138
出版年: 2014
卷: 41, 期: 3 起始页码: 777
结束页码: 784
语种: 英语
英文关键词: Alfvén waves
; field-aligned current
; magnetosphere-ionosphere coupling
; multiple flow burst
Scopus关键词: Electrons
; Embedded systems
; Plasma sheaths
; Spacecraft
; Counterstreaming electrons
; Electron acceleration
; Field aligned currents
; Low energy electrons
; Magnetosphere-ionosphere coupling
; Multiple flows
; N-waves
; Short time scale
; Shear flow
; acceleration
; altitude
; aurora
; electron
; ionosphere
; magnetosphere
; observational method
; timescale
; vorticity
英文摘要: At 10:00 UT on 25 February 2008, Cluster 1 spacecraft crossed the near-midnight auroral zone, at about 2 RE altitude, while two of the Time History of Events and Macroscale Interactions During Substorms (THEMIS) spacecraft, THD and THE, observed multiple flow bursts on the near-conjugate plasma sheet field lines. The flow shear pattern at THEMIS was consistent with the vortical motion at duskside of a localized flow channel. Coinciding in time with the flow bursts, Cluster 1 observed bursts of counterstreaming electrons with mostly low energies (≤441 eV), accompanied by short time scale (<5 s) magnetic field disturbances embedded in flow-associated field-aligned current systems. This conjugate event not only confirms the idea that the plasma sheet flows are the driver of the kinetic Alfvén waves accelerating the low-energy electrons but is a unique observation of disturbances in the high-altitude auroral region relevant to the multiple plasma sheet flows. Key Points First observation of multiple flow signatures on near-conjugate flux tubes Low-energy electron profile suggests Alfvenic acceleration due to fast flow Multiple flow bursts are obtained to extend over large radial distance in tail ©2014. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893843108&doi=10.1002%2f2013GL058982&partnerID=40&md5=8122ec3bf9150053d5e6be2d4a44ea9a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7671
Appears in Collections: 气候减缓与适应
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作者单位: Space Research Institute, Austrian Academy of Sciences, Graz, Austria
Recommended Citation:
Nakamura R.,Karlsson T.,Hamrin M.,et al. Low-altitude electron acceleration due to multiple flow bursts in the magnetotail[J]. Geophysical Research Letters,2014-01-01,41(3).