Evaluation of Energy and Pitch-Angle Diffusion Rates of Radiation Belt Electrons

Details Evaluation of Energy and Pitch-Angle Diffusion Rates of Radiation Belt Electrons Evaluation of Energy and Pitch-Angle Diffusion Rates of Radiation Belt Electrons

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm51d..07s&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM51D-07

Physics

2716 Energetic Particles: Precipitating, 2720 Energetic Particles: Trapped, 2772 Plasma Waves And Instabilities (2471), 2774 Radiation Belts, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

Quasi-linear diffusion theory is an important tool for quantifying wave-particle interaction effects in radiation belt particle dynamics.Complete models of radiation belt electron transport need to include,in addition to radial (cross-L)diffusion,resonant diffusion due to electron gyroresonance with various wave-modes including VLF,ELF,and EMIC waves.We report recently-derived results for quasi-linear(momentum,mixed,and pitch-angle)diffusion coefficients for cyclotron resonance with field-aligned electromagnetic waves of any class and any spectral density.These new forms of diffusion coefficient can be evaluated using negligible CPU time,and can be incorporated efficiently into multi-dimensional radiation belt transport codes(e.g.,Salammbo). We use the new results to calculate bounce-averaged diffusion rates for cyclotron resonant interaction of electrons with (a)whistler-mode chorus in the Earth's outer radiation belt,and (b)EMIC waves along the plasmapause.

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