Emissions of second-harmonic auroral kilometric radiation

Details Emissions of second-harmonic auroral kilometric radiation Emissions of second-harmonic auroral kilometric radiation

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....8810072w&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Dec. 1, 1983, p. 10072-10080.

Physics

31

Auroral Irradiation, Harmonic Radiation, Kilometric Waves, Maser Outputs, Radio Auroras, Space Plasmas, Cyclotron Radiation, Plasma Frequencies, Plasma Resonance

Scientific paper

The cyclotron maser theory of Wu and Lee (1979) is used in treating second-harmonic auroral kilometric radiation (AKR). Good agreement is obtained with the ISIS 1 observation reported by Benson (1982). It is found that when the ratio of the electron plasma frequency to the electron gyrofrequency is less than 0.3, the fundamental AKR prevails over the second-harmonic AKR. When the value of this ratio is greater than or approximately equal to 0.3, the fundamental AKR may become weaker than the second-harmonic AKR, and when it is greater than 0.3 the fundamental AKR may diminish. It is also found that the second harmonic AKR with frequencies below twice the electron gyro-frequency can propagate downward.

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