Simulation of EMIC Excitation in a Model Magnetosphere Including Realistic High-density Plumes

Details Simulation of EMIC Excitation in a Model Magnetosphere Including Realistic High-density Plumes Simulation of EMIC Excitation in a Model Magnetosphere Including Realistic High-density Plumes

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm33a1752c&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM33A-1752

Physics

2471 Plasma Waves And Instabilities (2772), 2756 Planetary Magnetospheres (5443, 5737, 6033), 2772 Plasma Waves And Instabilities (2471), 2774 Radiation Belts, 7867 Wave/Particle Interactions (2483, 6984)

Scientific paper

The HOTRAY code is used to evaluate the path integrated gain of EMIC waves as a function of frequency in two propagation bands above the O+ gyrofrequency. Calculations are performed over a range of L-shell (3+-He+-O+ plasma with an additional bi-Maxwellian hot ring current proton distribution. The cold plasma model includes a high-density storm-time plume region containing spatial density fluctuations. As a self-consistent test on whether EMIC waves play an important role in relativistic electrons loss from the radiation belts, we evaluate the minimum cyclotron resonant electron energy as a function of frequency and L shell for those EMIC waves that exhibit significant gain. The effects of ion composition on wave gain and electron resonant energy are investigated in the simulation by varying the He+ composition from 5% to 20% and the O+ composition from 1% to 10%. The effects of plume density and density fluctuation inside the plumes are also evaluated.

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