Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm33a0352l&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SM33A-0352
Physics
2716 Energetic Particles: Precipitating, 2720 Energetic Particles: Trapped, 2730 Magnetosphere: Inner, 2753 Numerical Modeling, 2774 Radiation Belts
Scientific paper
Relativistic electrons in the outer radiation belt can undergo pitch-angle diffusion and energy diffusion by chorus waves and can also be scattered in pitch-angle by electromagnetic ion cyclotron (EMIC) waves. Using quasi-linear pitch-angle diffusion coefficients for cyclotron resonance with field-aligned waves, we examine if resonant interactions with chorus waves produce net acceleration or net loss of relativistic electrons. The evolution of the relativistic electron fluxes is studied using the 2-D diffusion code obtained from the modified Fokker-Planck equation. The numerical simulations show that whistler-mode chorus waves with realistic wave spectral properties result in net acceleration of electrons, while EMIC waves which provide fast scattering near the edge of the loss cone may be a dominant loss mechanism during the main phase of storm.
Li Wangrong
Shprits Yuri Y.
Thorne Robert
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