DOI: 10.1002/grl.50608
论文题名: The formation and evolution of double layers inside the auroral cavity
作者: Main D.S. ; Newman D.L. ; Scholz C. ; Ergun R.E.
刊名: Geophysical Research Letters
ISSN: 0094-8874
EISSN: 1944-8605
出版年: 2013
卷: 40, 期: 12 起始页码: 2897
结束页码: 2901
语种: 英语
英文关键词: auroral potential drop
; double layers
; numerical simulation
Scopus关键词: Double layers
; Electric field structures
; Formation and evolutions
; Parallel electric fields
; Particle-in-cell simulations
; Potential drop
; Simultaneous analysis
; Two-dimensional simulations
; Computer simulation
; Electric fields
; Phase space methods
; Two dimensional
; atmospheric electricity
; aurora
; electric field
; one-dimensional modeling
; plasma
; two-dimensional modeling
英文摘要: The formation and dynamic evolution of double layers which form inside the auroral cavity are studied using one- and two-dimensional electrostatic particle-in-cell simulations. Both the one- and two-dimensional simulations are confined to processes that occur in the auroral cavity and include four plasma populations: hot electrons, H+ and O+ anti-earthward ion beams and a hot H+background population. We show that double layers inside the auroral cavity can evolve nonlinearly from ion phase space holes and are supported by the cold, anti-earthward traveling O+beam. We then present two-dimensional particle-in-cell results which show that double layers in the interior of the auroral cavity can form in higher dimensions. The electric field structure in 2-D is verified as a double layer through simultaneous analysis of the parallel electric field and H+ and O+ phase space. Key Points Formation mechanism of double layers inside the auroral cavity is demonstrated The mid-cavity double layer contributes to the total auroral potential drop We surmise the existence of two classes of mid-cavity double layers ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880518653&doi=10.1002%2fgrl.50608&partnerID=40&md5=9373aa83c8b135ddf8631da4ed61954b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6138
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics, John Brown University, 2000 W. University, Siloam Springs, AR 72761, United States
Recommended Citation:
Main D.S.,Newman D.L.,Scholz C.,et al. The formation and evolution of double layers inside the auroral cavity[J]. Geophysical Research Letters,2013-01-01,40(12).