Chorus acceleration of radiation belt relativistic electrons during March 2013 geomagnetic storm

Fuliang Xiao; C. A Kletzing; Chang Yang; W. S Kurth; Zhaoguo He; G. B Hospodarsky; Zhenpeng Su; D. N Baker; Qinghua Zhou; Yihua He; H. E Spence; G. D Reeves; H. O Funsten; J. B Blake; J. R Wygant

doi:10.1002/2014JA019822

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Chorus acceleration of radiation belt relativistic electrons during March 2013 geomagnetic storm

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Chorus acceleration of radiation belt relativistic electrons during March 2013 geomagnetic storm

Fuliang Xiao, C. A Kletzing, Chang Yang, W. S Kurth, Zhaoguo He, G. B Hospodarsky, Zhenpeng Su, D. N Baker, Qinghua Zhou, Yihua He, …

Journal of geophysical research. Space physics, Vol.119(5), pp.3325-3332

05/2014

DOI: 10.1002/2014JA019822

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Abstract

The recent launching of Van Allen probes provides an unprecedent opportunity to investigate variations of the radiation belt relativistic electrons. During the 17–19 March 2013 storm, the Van Allen probes simultaneously detected strong chorus waves and substantial increases in fluxes of relativistic (2 − 4.5 MeV) electrons around L = 4.5. Chorus waves occurred within the lower band 0.1–0.5fce (the electron equatorial gyrofrequency), with a peak spectral density ∼10−4 nT2/Hz. Correspondingly, relativistic electron fluxes increased by a factor of 102–103 during the recovery phase compared to the main phase levels. By means of a Gaussian fit to the observed chorus spectra, the drift and bounce‐averaged diffusion coefficients are calculated and then used to solve a 2‐D Fokker‐Planck diffusion equation. Numerical simulations demonstrate that the lower‐band chorus waves indeed produce such huge enhancements in relativistic electron fluxes within 15 h, fitting well with the observation. Key Points Initial RBSP correlated data of chorus waves and relativistic electron fluxes A realistic simulation to examine effect of chorus on relativistic electron flux Chorus yields huge increases in electron flux rapidly, consistent with data

chorus waves

RBSP results

relativistic electron acceleration

wave‐particle interaction

Details

Title: Subtitle: Chorus acceleration of radiation belt relativistic electrons during March 2013 geomagnetic storm
Creators: Fuliang Xiao - Changsha University of Science and Technology
C. A Kletzing - University of Iowa
Chang Yang - Changsha University of Science and Technology
W. S Kurth - University of Iowa
Zhaoguo He - Chinese Academy of Sciences
G. B Hospodarsky - University of Iowa
Zhenpeng Su - University of Science and Technology of China
D. N Baker - University of Colorado Boulder
Qinghua Zhou - Changsha University of Science and Technology
Yihua He - Changsha University of Science and Technology
H. E Spence - University of New Hampshire
G. D Reeves - Los Alamos National Laboratory
H. O Funsten - Los Alamos National Laboratory
J. B Blake - The Aerospace Corporation
J. R Wygant - Changsha University of Science and Technology
Resource Type: Journal article
Publication Details: Journal of geophysical research. Space physics, Vol.119(5), pp.3325-3332
DOI: 10.1002/2014JA019822
ISSN: 2169-9380
eISSN: 2169-9402
Number of pages: 8
Language: English
Date published: 05/2014
Academic Unit: Physics and Astronomy
Record Identifier: 9984199719302771

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