Physics
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.5727b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, June 1, 1988, p. 5727-5740. DOE-supported research.
Physics
7
Atmospherics, Auroral Zones, Kilometric Waves, Plasma Currents, Magnetohydrodynamic Flow, Plasma Layers, Plasma-Particle Interactions
Scientific paper
When temporally modulated, the gyrophase-bunched sheet beams of electrons that emanate from magnetized double layers may produce electromagnetic radiation with high efficiencies in narrow frequency bands of about 200 Hz, the electromagnetic waves being broadcast in the north-south (constant longitude) direction. For the modulated-beam mechanism, efficiencies, power levels, and polarizations are estimated. It is found that about 160 auroral arcs that are each 1000-km-long are necessary to produce 10 to the 9th W of radiation. Beam modulation mechanisms, auroral zone measurement techniques, and electromagnetic wave reflection are discussed, and a laboratory experiment to study the modulated-beam emission mechanism is outlined.
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