Physics – Geophysics
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.2431c&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 22, p. 2431-2434
Physics
Geophysics
1
Plasma Compression, Plasma Density, Plasma Turbulence, Plasma Waves, Pulse Generators, Radio Frequencies, Earth Ionosphere, Geophysics, Mathematical Models, Wave Equations, Wave Propagation
Scientific paper
We demonstrate, using a simple model, that high intensity pulses can be generated, by making use of the dispersive properties of the ionosphere, from a modifier of much lower intensity whose frequency is a parabolic function of time. We show that such a frequency-chirped pulse can be constructed so that its various components overtake each other at a prescribed height, resulting in large (up to one hundred times) transient intensity enhancements as compared to those achievable from a steady modifier operating at the same power. We examine briefly one possible application: the enhancement of plasma wave amplitudes which occurs as a result of the interaction of such a compressed pulse with pre-generated turbulence.
Cowley Steve C.
Perkins Francis W.
Valeo Ernie J.
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