A theoretical study on the broad symmetric structure in the stimulated electromagnetic emission spectrum
Journal Article
·
· Journal of Geophysical Research
- Polytechnic Univ., Farmingdale, NY (United States)
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. 36 refs., 2 figs.
- OSTI ID:
- 70522
- Journal Information:
- Journal of Geophysical Research, Journal Name: Journal of Geophysical Research Journal Issue: A2 Vol. 100; ISSN JGREA2; ISSN 0148-0227
- Country of Publication:
- United States
- Language:
- English
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