Dynamic evolution of energetic outer zone electrons due to wave-particle interactions during storms

TitleDynamic evolution of energetic outer zone electrons due to wave-particle interactions during storms
Publication TypeJournal Article
Year of Publication2007
AuthorsLi, W, Shprits, YY, Thorne, RM
JournalJournal of Geophysical Research
Volume112
Date Published10/2007
ISSN0148-0227
KeywordsLocal Loss due to VLF/ELF/EMIC Waves
Abstract[1] Relativistic electrons in the outer radiation belt are subjected to pitch angle and energy diffusion by chorus, electromagnetic ion cyclotron (EMIC), and hiss waves. Using quasi-linear diffusion coefficients for cyclotron resonance with field-aligned waves, we examine whether the resonant interactions with chorus waves produce a net acceleration or loss of relativistic electrons. We also examine the effect of pitch angle scattering by EMIC and hiss waves during the main and recovery phases of a storm. The numerical simulations show that wave-particle interactions with whistler mode chorus waves with realistic wave spectral properties result in a net acceleration of relativistic electrons, while EMIC waves, which provide very fast scattering near the edge of the loss cone, may be a dominant loss mechanism during the main phase of a storm. In addition, hiss waves are effective in scattering equatorially mirroring electrons and may be an important mechanism of transporting high pitch angle electrons toward the loss cone.
URLhttp://onlinelibrary.wiley.com/doi/10.1029/2007JA012368/full
DOI10.1029/2007JA012368


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