Computer Science
Scientific paper
Sep 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39.1223v&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 39, Sept. 1991, p. 1223-1232.
Computer Science
2
Auroras, Cyclotron Resonance, Electron Beams, Kilometric Waves, Nonuniform Plasmas, Geomagnetism, Plasma Density, Refractivity, Wave Interaction
Scientific paper
A study is made of the influence of plasma and geomagnetic field inhomogeneities upon the X-mode generation process of auroral kilometric radiation (AKR) due to cyclotron maser resonance. It is shown that the generation of AKR by auroral electron beams of typical energies 1-10 keV takes effect only in those local regions of a discrete arc where the regular longitudinal inhomogeneity of the geomagnetic field is compensated by the longitudinal inhomogeneity of magnetospheric plasma. Outside of such regions, waves recover too rapidly from cyclotron maser resonance as a consequence of a decrease of the longitudinal component of the wave vector. A critical study is made of an earlier solution to this problem through wave generation, with the transverse component of the refractive index being close to unity.
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