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

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

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jgra..11210220l&link_type=abstract

Journal of Geophysical Research, Volume 112, Issue A10, CiteID A10220

Physics

Plasma Physics

82

Space Plasma Physics: Wave/Particle Interactions (2483, 6984), Magnetospheric Physics: Energetic Particles: Trapped, Magnetospheric Physics: Energetic Particles: Precipitating, Magnetospheric Physics: Radiation Belts, Magnetospheric Physics: Numerical Modeling

Scientific paper

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.

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