Physics
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96..217t&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Jan. 1, 1991, p. 217-223.
Physics
13
High Temperature Plasmas, Plasma Pressure, Plasma-Electromagnetic Interaction, Solar Wind, Anisotropic Media, Gyrofrequency, Plasma Spectra, Solar Protons
Scientific paper
The classical linear theory of electromagnetic wave growth in a warm plasma is considered for waves propagating parallel to a uniform ambient magnetic field. Wave-growth rates are calculated for ion-driven right-hand mode waves for Kappa and Maxwellian particle distribution functions and for various values of the spectral index, the temperature anisotropy, and the ratio of plasma pressure to magnetic pressure appropriate to the solar wind. When the anisotropy is low the wave growth is limited to frequencies below the proton gyrofrequency and the growth rate increases dramatically as the spectral index is reduced. The growth rate for any Kappa distribution greatly exceeds that for a Maxwellian with the same bulk properties. For large thermal anisotropy the growth rate from either distribution is greatly enhanced. The growth rates from a Kappa distribution are generally larger than for a Maxwellian distribution, and significant wave growth occurs over a broader range of frequencies.
Mansergh Thorne Richard
Summers Danny
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