Nonconvective ion cyclotron instability

Details Nonconvective ion cyclotron instability Nonconvective ion cyclotron instability

Jan 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975p%26ss...23..123w&link_type=abstract

Planetary and Space Science, vol. 23, Jan. 1975, p. 123-131.

Physics

4

Ion Cyclotron Radiation, Magnetohydrodynamic Stability, Magnetospheric Instability, Plasma Waves, Ring Currents, Cold Plasmas, Convective Flow, Proton Precipitation, Wave Dispersion

Scientific paper

The electromagnetic ion cyclotron instability is shown to be nonconvective for a wide range of plasma beta's and ring current proton anisotropies (A). The addition of cold plasma to the ring current enlarges the region of the beta-A parameter space for nonconvective instability. Thus, despite the high Alfven speed outside the plasmasphere, ion cyclotron wave amplitudes could grow to appreciable levels and contribute to the pitch-angle and energy diffusion of ring current protons.

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