Parametric generation of whistler waves due to the interaction of high-frequency wave beams with a magnetoplasma

The parametric generation of low-frequency whistler waves by a pump wave beam formed by high-frequency whistler waves with close frequencies is studied experimentally. The electromagnetic fields excited by the beats of two co- or counterpropagating high-frequency waves, or by an amplitude-modulated...

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Bibliographic Details
Published inJETP letters Vol. 88; no. 11; pp. 720 - 724
Main Authors Gushchin, M. E., Korobkov, S. V., Kostrov, A. V., Strikovskii, A. V.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.02.2008
Subjects
Atomic
Biological and Medical Physics
Biophysics
Gases
Molecular
Optical and Plasma Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Plasma
Quantum Information Technology
Solid State Physics
Spintronics
52.35.Hr
52.25.Xz
52.72.+v
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Summary:The parametric generation of low-frequency whistler waves by a pump wave beam formed by high-frequency whistler waves with close frequencies is studied experimentally. The electromagnetic fields excited by the beats of two co- or counterpropagating high-frequency waves, or by an amplitude-modulated pump are studied. It is shown that the nonlinear currents at the beat (modulation) frequency are generated by a transverse ponderomotive force arising due to the finite width of the high-frequency beam. In this case, the nonlinear azimuthal drift currents enclose the pump beam and can radiate low-frequency whistler waves to the surrounding plasma.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364008230045