Flute mode waves near the lower hybrid frequency excited by ion rings in velocity space

Details Flute mode waves near the lower hybrid frequency excited by ion rings in velocity space Flute mode waves near the lower hybrid frequency excited by ion rings in velocity space

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9.1167c&link_type=abstract

Geophysical Research Letters, vol. 9, Oct. 1982, p. 1167-1170.

Physics

28

Ion Motion, Ionospheric Disturbances, Plasma Pumping, Plasma-Particle Interactions, Satellite Observation, Wave Excitation, Auroral Zones, Cyclotron Frequency, Electrostatics, Emission Spectra, Plasma Frequencies, Propagation Modes, Wave Propagation

Scientific paper

Discrete emissions at the lower hybrid frequency are often seen on the S3-3 satellite. Simultaneous observation of perpendicularly heated ions suggests that these ions may provide the free energy necessary to drive the instability. Studies of the dispersion relation for flute modes excited by warm ion rings in velocity space show that waves are excited with real frequencies near the lower hybrid frequency and with growth rates ranging from about 0.01 to 1 times the ion cyclotron frequency. Numerical results are therefore consistent with the possibility that the observed ions are the free energy source for the observed waves.

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