Physics – Plasma Physics
Scientific paper
Mar 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99.4023s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A3, p. 4023-4025
Physics
Plasma Physics
4
Collisional Plasmas, Earth Ionosphere, Electromagnetic Radiation, Ionospheric Temperature, Ponderomotive Forces, Radio Waves, Ionospheric Heating, Ionospheric Ion Density, Plasma Physics
Scientific paper
Accounting for ponderomotive force and differential Joule heating nonlinearities as well as relativistic electron mass variation, we consider the parametric coupling between a large-amplitude electromagnetic wave and nonresonant density and temperature perturbations. A nonlinear dispersion relation that is appropriate for the modulational instability is presented. Some interesting regimes for the thermal modulational instability are identified, and expressions for their increments are obtained. The results can be useful in understanding the phenomena of enhanced density and temperature fluctuations that have been observed during the artificial modification of the Earth's ionosphere by high-power radio waves.
Kant Shukla Padma
Vladimirov Sergey V.
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