Physics – Plasma Physics
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....9817597l&link_type=abstract
Journal of Geophysical Research, Volume 98, Issue A10, p. 17597-17606
Physics
Plasma Physics
58
Space Plasma Physics: Active Perturbation Experiments, Space Plasma Physics: Waves And Instabilities, Space Plasma Physics: Radiation Processes
Scientific paper
Experimental results concerning the spectrum of stimulated electromagnetic emissions (SEE) in the sidebands of a powerful high-frequency electromagnetic ordinary mode pump wave are presented. The pump wave was vertically injected into the ionospheric F region from the Sura ionospheric modification facility in Russia. We report detailed measurements of the commonly observed continuum, downshifted maximum, and broad upshifted maximum emissions for pump frequencies ranging from the fourth to above the seventh electron cyclotron harmonic in the ionospheric plasma as well as observations of a new wideband emission occurring primarily in the upper sideband. The dependence of the SEE spectral structure on the pump frequency in relation to electron cyclotron harmonics is emphasized. All spectral features in the sidebands of the pump exhibit cyclotron harmonic effects.
Frolov Vladimir L.
Goodman Sally
Grach S. M.
Karashtin A. N.
Komrakov Georgy P.
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