Relativistic dispersion and the generation of auroral kilometric radiation

Details Relativistic dispersion and the generation of auroral kilometric radiation Relativistic dispersion and the generation of auroral kilometric radiation

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11..143p&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 11, Feb. 1984, p. 143-146.

Physics

48

Atmospheric Radiation, Auroral Zones, Kilometric Waves, Wave Dispersion, Computerized Simulation, Cyclotron Frequency, Propagation Modes, Wave Propagation

Scientific paper

Under the conditions at which auroral kilometric radiation (AKR) is known to be produced by a plasma sheet electron region, relativistic effects of the dispersion of extraordinary-mode waves near the electron cyclotron frequency are found to be very significant. The application of linear theory and computer simulation to a model distribution indicates that an extraordinary mode of a particular Reynolds number dominated the radiation emission due to the cyclotron maser instability, suggesting that hot electrons determine the propagation characteristics of AKR and that larger growth rates are possible for direct amplification of extraordinary waves in the auroral region than had been predicted by calculations employing cold plasma dispersion.

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