The auroral plasma cavity

Details The auroral plasma cavity The auroral plasma cavity

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981georl...8..919c&link_type=abstract

Geophysical Research Letters, vol. 8, Aug. 1981, p. 919-921.

Physics

179

Auroral Zones, Cyclotron Frequency, Kilometric Waves, Magnetic Field Configurations, Plasma Density, Plasma Frequencies, Geomagnetism, Hawkeye Satellites, Plasma Waves, Spectrum Analysis

Scientific paper

A region of diminished plasma density has been found to occur at the source of auroral kilometric radiation (AKR). The density within this auroral plasma cavity, determined from limited Hawkeye wave data, was less than 1/cu cm from 1.8 to 3 earth radii geocentric, at 70 deg + or - 3 deg invariant magnetic latitude. The altitude variation of the magnetic field produces a minimum in the ratio of plasma frequency to cyclotron frequency within the cavity which accounts for the observed spectrum of AKR.

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