HR: 09:30h
AN: SM51D-07    [Abstracts]
TI: Evaluation of Energy and Pitch-Angle Diffusion Rates of Radiation Belt Electrons
AU: * Summers, D
EM: dsummers@math.mun.ca
AF: Memorial University of Nfld, Dept of Math and Stats, St. John's, NF A1C 5S7 Canada
AB: 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.
DE: 2716 Energetic particles: precipitating
DE: 2720 Energetic particles: trapped
DE: 2772 Plasma waves and instabilities (2471)
DE: 2774 Radiation belts
DE: 2788 Magnetic storms and substorms (7954)
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005