Plasma wave observations during electron beam experiments at high altitudes

Details Plasma wave observations during electron beam experiments at high altitudes Plasma wave observations during electron beam experiments at high altitudes

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9417267o&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Dec. 1, 1989, p. 17267-17273. Research supported by the U.S. Navy and

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Electron Beams, Gyrofrequency, Plasma Waves, Space Plasmas, Spacecraft Charging, Electron Guns, Plasma Heating, Satellite Sounding

Scientific paper

Electron beam experiments on the nearly geosynchronous P78-2 satellite conducted in 1979 resulted in observations of intense radiation near the local electron gyrofrequency. These signals resembled naturally occurring f(ce) waves during the same period. The amplitude of the simulated waves depended upon beam parameters. During 50-eV beam operations, current levels of 10 microamps produced strong emissions. Current levels of 1 microamp and 100 microamps did not. These emissions correspond in time to previously reported observations of electron distributions, which suggest heating of the local thermal plasma. Sufficient power is in the observed emissions to explain some aspects of the heated electron distributions observed during the experiments.

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