DOI: 10.1002/2014GL062034
论文题名: Electron distribution functions in the electron diffusion region of magnetic reconnection: Physics behind the fine structures
作者: Bessho N. ; Chen L.-J. ; Shuster J.R. ; Wang S.
刊名: Geophysical Research Letters
ISSN: 0094-9442
EISSN: 1944-9173
出版年: 2014
卷: 41, 期: 24 起始页码: 8688
结束页码: 8695
语种: 英语
英文关键词: electron diffusion region
; electron distribution function
; magnetic reconnection
; particle-in-cell simulation
Scopus关键词: Diffusion
; Distribution functions
; Accelerated electrons
; Electron diffusion
; Electron distribution function
; Formation mechanism
; Magnetic reconnections
; Particle-in-cell simulations
; Satellite measurements
; Triangular distribution
; Electrons
; diffusion
; electron density
; reaction kinetics
; satellite data
; simulation
; striation
英文摘要: Highly structured electron distribution functions in the electron diffusion region (EDR) during magnetic reconnection are studied by means of fully kinetic simulations. Four types of structures (striations, arcs, swirls, and rings) in momentum space are analyzed to understand their formation mechanisms. Discrete striations are formed by particles undergoing different numbers of meandering bounces in the EDR and are a result of oscillations in the out-of-plane force on meandering electrons. Predictions for the separation between striations and the triangular shape of the distribution are obtained analytically. Arcs and swirls are due to partial remagnetization of accelerated electrons. Near the end of the outflow jet, electron remagnetization gives rise to the ring structure. Understanding the distribution structures is critical to unraveling the kinetic processes occurring in the EDR and will guide the identification of EDRs based on satellite measurements. Key PointsOscillating Lorentz force in bounce motion causes striations in distributionsA triangular distribution is formed due to particle motion in the neutral planeArcs, swirls, and rings are formed as electrons are gradually magnetized ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921779302&doi=10.1002%2f2014GL062034&partnerID=40&md5=3e65dc404623cca21a843ce9e850258e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6706
Appears in Collections: 气候减缓与适应
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作者单位: Department of Astronomy, University of Maryland, College Park, MD, United States
Recommended Citation:
Bessho N.,Chen L.-J.,Shuster J.R.,et al. Electron distribution functions in the electron diffusion region of magnetic reconnection: Physics behind the fine structures[J]. Geophysical Research Letters,2014-01-01,41(24).