Physics
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jgr...100.1639h&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 100, no. A2, p. 1639-1645
Physics
8
Bernstein Energy Principle, Electromagnetic Spectra, Emission Spectra, Radio Waves, Cyclotron Frequency, Cyclotron Resonance, High Frequencies, Larmor Radius
Scientific paper
A modulational instability of the electron Bernstein wave is studied. The process involves decay of the pump electron Bernstein wave into both a Stokes electron Bernstein sideband and an anti-Stokes electron Bernstein sideband, together with a lower-hybrid decay mode. The threshold field of the proposed instability for third-harmonic resonance is found to be around 1 V/m in a height region sufficiently below the upper-hybrid resonance layer and increases with the harmonic number l. It is then proposed that scattering of the anti-Stokes and Stokes sidebands of this modulational instability off field-aligned density irregularities produces frequency-upshifted and frequency-downshifted sidebands constituting the broad symmetric structure in the stimulated electromagnetic emission spectrum observed in ionospheric heating experiments.
Huang Jianwei
Kuo Spencer P.
Zhou H. L.
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