Calculation of Quasilinear Diffusion Coefficients Using Test Particle Simulations

Details Calculation of Quasilinear Diffusion Coefficients Using Test Particle Simulations Calculation of Quasilinear Diffusion Coefficients Using Test Particle Simulations

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm11b1711t&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM11B-1711

Physics

Plasma Physics

[7807] Space Plasma Physics / Charged Particle Motion And Acceleration, [7867] Space Plasma Physics / Wave/Particle Interactions

Scientific paper

Test particle calculations of multiple interactions between electrons and whistler mode waves in a homogeneous magnetic field are shown. We use a model of the wave distribution with (i) only parallel propagating waves and (ii) with a general Gaussian wave normal angle distribution, modeled after a typical wave normal angle distribution that has been used in previous studies using quasilinear theory. Diffusion coefficients from the test particle simulations are compared with those from quasilinear theory. Similarities and differences between test-particle simulation results and theoretical calculations are discussed. As an important consequence of our work, we demonstrate the deviation of the test-particle scattering from the predictions of quasilinear theory due to decreasing the frequency bandwidth or increasing the wave amplitude. The results are useful in understanding the role of whistler waves in radiation belt electron dynamics and the validity of using quasilinear theory to describe wave particle interactions in space plasmas.

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