DOI: 10.1002/2016GL069125
论文题名: Strong enhancement of 10–100 keV electron fluxes by combined effects of chorus waves and time domain structures
作者: Ma Q. ; Mourenas D. ; Artemyev A. ; Li W. ; Thorne R.M. ; Bortnik J.
刊名: Geophysical Research Letters
ISSN: 0094-9557
EISSN: 1944-9288
出版年: 2016
卷: 43, 期: 10 起始页码: 4683
结束页码: 4690
语种: 英语
英文关键词: chorus wave acceleration
; electron precipitation
; electron seed population
; time domain structures
Scopus关键词: Atmospherics
; Electric fields
; Electromagnetic waves
; Electron scattering
; Magnetosphere
; Radiation belts
; Chorus waves
; Electron precipitation
; Energy distributions
; Low energy electrons
; Outer radiation belt
; Relativistic energy
; Strong enhancement
; Time domain
; Electrons
; acceleration
; domain structure
; electric field
; electron
; energy flux
; mathematical analysis
; precipitation (chemistry)
; scattering
; simulation
英文摘要: Time domain structures (TDSs) are trains of intense electric field spikes observed in large numbers during plasma injections in the outer radiation belt. Here we explore the question of their importance in energetic electron acceleration and loss in this region. Although the most common TDSs can preaccelerate low-energy electrons up to 1–5 keV energies, they often cannot produce by themselves the seed population of 30–150 keV electrons, which are needed for a subsequent energization up to relativistic energies during storms or substorms. However, we demonstrate by numerical simulations that modifications of the low-energy electron pitch angle and energy distributions due to interactions with TDS lead to more efficient scattering of electrons by chorus waves toward both higher and lower pitch angles, ultimately leading to both significantly higher fluxes in the 10–100 keV energy range and more intense 1–100 keV precipitation into the atmosphere, potentially affecting the outer radiation belt dynamics. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84970029045&doi=10.1002%2f2016GL069125&partnerID=40&md5=66595e88073c60f8c1376dc7d8eab2ce
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10520
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: Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States
Recommended Citation:
Ma Q.,Mourenas D.,Artemyev A.,et al. Strong enhancement of 10–100 keV electron fluxes by combined effects of chorus waves and time domain structures[J]. Geophysical Research Letters,2016-01-01,43(10).