On waveguide propagation of Alfven waves at the plasmapause

Details On waveguide propagation of Alfven waves at the plasmapause On waveguide propagation of Alfven waves at the plasmapause

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33..471d&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 33, May 1985, p. 471-477.

Physics

5

Geomagnetic Pulsations, Magnetohydrodynamic Waves, Plasmapause, Wave Dispersion, Waveguides, Earth Magnetosphere, Magnetic Fields, Propagation Modes, Propagation Velocity, Wave Propagation

Scientific paper

A study is made of the influence of cool dispersion (due to ion inertia) upon the propagation of Alfven waves in the magnetosphere. It is shown that the Alfven velocity minimum elongated along the magnetic field, may act as a waveguide. Some waveguiding properties of the plasmapause are investigated and relevant eigen-modes determined. The possibility of interpreting geomagnetic pulsations of various types as eigen-oscillations of the waveguide at the plasmapause, is discussed.

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