DOI: 10.1002/2016GL069749
论文题名: Inner zone and slot electron radial diffusion revisited
作者: O'Brien T.P. ; Claudepierre S.G. ; Guild T.B. ; Fennell J.F. ; Turner D.L. ; Blake J.B. ; Clemmons J.H. ; Roeder J.L.
刊名: Geophysical Research Letters
ISSN: 0094-8873
EISSN: 1944-8604
出版年: 2016
卷: 43, 期: 14 起始页码: 7301
结束页码: 7310
语种: 英语
英文关键词: inner zone
; radial diffusion
; radiation belt
Scopus关键词: NASA
; Phase space methods
; Plasma theory
; Radiation belts
; Co-ordinate system
; Electrostatic potentials
; Inner radiation belts
; Phase space densities
; Pitch angle
; Pitch-angle scattering
; Radial diffusion
; Radial variations
; Diffusion
; electron
; estimation method
; observational method
; probe
; radial diffusion
; scattering
; temporal variation
英文摘要: Using recent data from NASA's Van Allen Probes, we estimate the quiet time radial diffusion coefficients for electrons in the inner radiation belt (L < 3) with energies from ~50 to 750 keV. The observations are consistent with dynamics dominated by pitch angle scattering and radial diffusion. We use a coordinate system in which these two modes of diffusion are separable. Then we integrate phase space density over pitch angle to obtain a “bundle content” that is invariant to pitch angle scattering, except for atmospheric loss. We estimate the effective radial diffusion coefficient from the temporal and radial variation of the bundle content. We show that our diffusion coefficients agree well with previously determined values obtained in the 1960s and 1970s and follow the form one expects for radial diffusion caused by exponentially decaying impulses in the large-scale electrostatic potential. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978476725&doi=10.1002%2f2016GL069749&partnerID=40&md5=96abb4553d3cb9f2d66cc89d4c368f4f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9836
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: Space Sciences Department, The Aerospace Corporation, El Segundo, CA, United States
Recommended Citation:
O'Brien T.P.,Claudepierre S.G.,Guild T.B.,et al. Inner zone and slot electron radial diffusion revisited[J]. Geophysical Research Letters,2016-01-01,43(14).