Van Allen Probes observations of prompt MeV radiation belt electron acceleration in nonlinear interactions with VLF chorus
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Foster_et_al-2017-JGR_NL_RB_Acceleration (002).pdf
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Author(s)
Omura, Y.
Baker, D. N.
Kletzing, C. A.
Claudepierre, S. G.
Foster, John C
Erickson, Philip J
Date Issued
January 2017
Journal
Journal of Geophysical Research: Space Physics
Publisher
American Geophysical Union (AGU)
Citation
Foster, J. C., P. J. Erickson, Y. Omura, D. N. Baker, C. A. Kletzing, and S. G. Claudepierre. “Van Allen Probes Observations of Prompt MeV Radiation Belt Electron Acceleration in Nonlinear Interactions with VLF Chorus.” Journal of Geophysical Research: Space Physics 122, no. 1 (January 2017): 324–339.
Version
Final published version
Abstract
Prompt recovery of MeV (millions of electron Volts) electron populations in the poststorm core of the outer terrestrial radiation belt involves local acceleration of a seed population of energetic electrons in interactions with VLF chorus waves. Electron interactions during the generation of VLF rising tones are strongly nonlinear, such that a fraction of the relativistic electrons at resonant energies are trapped by waves, leading to significant nonadiabatic energy exchange. Through detailed examination of VLF chorus and electron fluxes observed by Van Allen Probes, we investigate the efficiency of nonlinear processes for acceleration of electrons to MeV energies. We find through subpacket analysis of chorus waveforms that electrons with initial energy of hundreds of keV to 3 MeV can be accelerated by 50 keV–200 keV in resonant interactions with a single VLF rising tone on a time scale of 10–100 ms.
MIT Department
Haystack Observatory
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1002/2016JA023429
