Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..43..199t&link_type=abstract
Astrophysics and Space Science, vol. 43, Aug. 1976, p. 199-211.
Astronomy and Astrophysics
Astrophysics
1
Diffusion Coefficient, Earth Magnetosphere, Magnetically Trapped Particles, Particle Diffusion, Plasma Resonance, Drift Rate, Kinetic Equations, Lines Of Force, Particle Acceleration, Plasmapause, Power Spectra, Ring Currents
Scientific paper
Within the framework of the quasi-linear approximation, the hybrid diffusion process due to the bounce-drift resonance interaction between trapped particles and low-frequency field fluctuations is examined. The diffusion coefficients obtained, which are valid for particles with large pitch angles, cover previous results in a few limiting cases. In general, the diffusion coefficients depend strongly on the spatial structure of the power spectrum along field lines as well as on the frequency. The relative importance of radial diffusion and field-aligned acceleration for ring-current particles is discussed. It is shown that field-aligned acceleration exceeds the inward penetration of particles near the plasmapause.
Ishihara Teruya
Tamao Tsutomu
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