Storey angle for whistler-mode waves

Details Storey angle for whistler-mode waves Storey angle for whistler-mode waves

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990p%26ss...38..327s&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 38, March 1990, p. 327-331. SERC-supported research.

Physics

3

Cold Plasmas, Electromagnetic Fields, High Temperature Plasmas, Propagation Modes, Whistlers, Anisotropy, Electron Density (Concentration), Electron Energy, Group Velocity, Gyrofrequency, Wave Propagation

Scientific paper

The concept of the Storey (1953) angle (i.e., the angle of maximal deviation of the direction of whistler-mode group velocity from the magnetic field) is generalized for the case when the ratio of the wave frequency (omega) to the electron gyrofrequency (Omega) is not negligibly small and when the effects of the finite electron density, ion contribution, nonzero electron temperature, and anisotropy of their distribution functions are all taken into account. Assuming these effects to be small, approximate expressions are derived for the Storey angle and for the wave normal angle at which the Storey angle is attained. These expressions are shown to be valid for realistic magnetospheric parameters, when omega is equal to or smaller than 0.45 Omega.

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