Physics
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jgra..11210209k&link_type=abstract
Journal of Geophysical Research, Volume 112, Issue A10, CiteID A10209
Physics
2
Ionosphere: Wave/Particle Interactions (7867), Radio Science: Waves In Plasma (7867), Space Weather: Magnetic Storms (2788), Ionosphere: Ionosphere/Magnetosphere Interactions (2736)
Scientific paper
We present the equatorial and bounce-averaged pitch angle diffusion coefficients for the scattering relativistic electrons by He +-mode electromagnetic ion cyclotron waves. Both the model (prescribed) and self-consistent distributions over the wave normal angle are considered. The main results of our calculation can be summarized as follows: First, in comparison with field-aligned waves, intermediate and highly oblique waves decrease the bounce-averaged scattering rate near the edge of the loss cone by up to orders of magnitude if the electron energy does not exceed a threshold (~2-5 MeV) depending on specified plasma and/or wave parameters. Second, for greater electron energies, oblique waves operating the |n| > 1 resonances are more effective and provide the same bounce-averaged diffusion rate near the edge of the loss cone as field-aligned waves do.
Gamayunov K. V.
Khazanov George V.
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