Stimulated Electromagnetic Emission: A New Diagnostic Technique for Active Experiments in Space
A.C.L. Chian, J.R.G. Abalde and L.P.L. Oliveira
Event name: 2nd International Congress of the Brazilian Geophysical Society
Session: Space and Atmospheric Geophysics
Publication date: 28 October 1991
Info: Extended abstract, PDF ( 199.91Kb )
Experimental evidence of supersonic Langmuir turbulence has been obtained in the vicinity of a satellite when high-power radio waves were transmitted for topside sounding of the ionosphere. It is shown that, in the presence of supersonic Langmuir turbulence, electromagnetic radiation near the local electron plasma frequency can be emitted through the electromagnetic parametric instabilities driven by intense Langmuir waves. The growth rates of these electromagnetic parametric instabilities are shown to be identical to the corresponding growth rates of the electrostatic Langmuir parametric instabilities. It is suggested that the stimulated electrornagnetic emission can become a useful diagnostic technique for active experiments in space.