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Parametrical Instability of Surface Type X‐modes Immersed into a Nonmonochromatic Pumping Electric Field
Author(s) -
Girka V. O.,
Lapshin V. I.,
Yu. Puzirkov S.
Publication year - 1999
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.2150390602
Subject(s) - physics , electric field , plasma , instability , excitation , amplitude , waveguide , magnetic field , plasma oscillation , atomic physics , electron , harmonics , dispersion relation , optics , mechanics , voltage , quantum mechanics
Parametrical excitation of surface type X‐modes (STXM) at the second harmonic of electron cyclotron frequency by nonmonochromatic external alternating electric field is under consideration. STXM are the eigenmodes of a planar magnetoactive plasma waveguide structure consisting of a metal wall with dielectric coating and uniform plasma filling. An external steady magnetic field is applied along the plasma interface, so it is perpendicular to the group velocity of the considered extraordinarily polarized waves. Influence of the plasma waveguide parameters on the parametrical instability of the STXM is studied. External alternating electric field is assumed to consist of two fields with different amplitudes and frequencies. A theoretical investigation is carried out using kinetic equation for plasma particles under the conditions of weak plasma spatial dispersion and small amplitudes of external electric fields. The obtained results can be useful for research in branch of edge plasma physics.