M. E. Gushchin, S. V. Korobkov, A. V. Kostrov, A. V. Strikovskii, “Parametric generation of whistler waves due to the interaction of high-frequency wave beams with a magnetoplasma”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2008, Volume 88, Issue 11,Pages <nobr>834

This article is cited in 16 papers

PLASMA, GASES

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

M. E. Gushchin, S. V. Korobkov, A. V. Kostrov, A. V. Strikovskii

Institute of Applied Physics, Russian Academy of Sciences, Nizhni Novgorod, 603950, Russia

Abstract: 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.

PACS: 52.25.Xz, 52.35.Hr, 52.72.+v

Received: 23.09.2008
Revised: 23.10.2008