Simultaneous generation of electron temperature and density fluctuations by high power HF radio waves

Details Simultaneous generation of electron temperature and density fluctuations by high power HF radio waves Simultaneous generation of electron temperature and density fluctuations by high power HF radio waves

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jatp...57..261s&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 57, no. 3, p. 261-264

Physics

Electron Density (Concentration), Electron Energy, Electron Pressure, High Frequencies, Ionospheric Disturbances, Periodic Variations, Radio Waves, Cyclotron Radiation, Earth Ionosphere, Gyrofrequency, Nonlinearity, Ohmic Dissipation, Resistance Heating, Thermal Instability

Scientific paper

The parametric interaction between right-hand circularly polarized electron cyclotron waves as well as non-resonant density and temperature perturbations is considered by taking into account the radiation pressure and the differential Joule heating nonlinearities. A nonlinear dispersion relation, which admits a new class of thermal parametric instabilities for the case in which Joule heating nonlinearity far exceeds the radiation pressure, is derived. It is found that the temperature and density fluctuations are rapidly driven when the pump frequency is close to the electron gyrofrequency. The relevance of our investigation to enhanced density and temperature fluctuations due to the action of high power HF radio waves in the Earth's ionosphere is pointed out.

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