Effect of electromagnetic ion cyclotron wave normal angle distribution on relativistic electron scattering in outer radiation belt

Details Effect of electromagnetic ion cyclotron wave normal angle distribution on relativistic electron scattering in outer radiation belt Effect of electromagnetic ion cyclotron wave normal angle distribution on relativistic electron scattering in outer radiation belt

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.

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