Broad continuum feature of stimulated electromagnetic emission

Details Broad continuum feature of stimulated electromagnetic emission Broad continuum feature of stimulated electromagnetic emission

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jastp..60.1233g&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 60, Issue 12, p. 1233-1246.

Physics

15

Scientific paper

Computer simulation results of the broad continuum (BC) feature in stimulated electromagnetic emission from the ionosphere are compared with experimental data. The simulations were performed in the framework of a theoretical model of the BC generation based on the double transformation of electromagnetic waves to upper hybrid (UH) waves and back due to the scattering on artificial magnetic field-aligned small-scale irregularities (FAI) of plasma density. An induced scattering of the UH waves on thermal ions produces a wide spectrum of the SEE. An empirical model of the FAI spectrum, development and decay was used in the simulations. It is shown that the main observed properties of the BC feature can be interpreted within the framework of the model considered. The relations of the FAI intensity and spectral shape, the pump power, and other parameters to BC peculiarities as well as possibilities for artificial ionospheric turbulence diagnostics by means of BC measurements are discussed.

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