Physics
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16.1469j&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 16, Dec. 1989, p. 1469-1472. Research supported by MIT.
Physics
17
Atmospheric Turbulence, Cyclotron Frequency, Extremely Low Radio Frequencies, Ion Temperature, Plasma Layers, Wave Generation, Auroral Zones, Cyclotron Resonance, Electric Fields, Heavy Ions, Oxygen Ions
Scientific paper
Consideration is given to the possible source of low frequency turbulence on closed field lines in the central plasma sheet, which is used to explain ion heating and conic formation. Observations show that ion distributions in the equatorial region are often anisotropic and that these distributions excite ion cyclotron waves below the proton gyrofrequency and near the harmonics of the hydrogen cyclotron frequency. It is suggested that downcoming right-hand circularly polarized waves acquire a left-hand circularly polarized component at the crossover frequency and may tunnel through a stop zone to altitudes where they contribute to ion heating.
André Mats
Chang Tom
Crew Geoff B.
Johnson Jay Robert
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