Parametric decays of a linearly polarized electromagnetic wave in an electron-positron plasma
Author
dc.contributor.author
Gomberoff, L.
Author
dc.contributor.author
Muñoz, V.
Author
dc.contributor.author
Galvão, R. M.O.
Admission date
dc.date.accessioned
2019-01-29T15:32:13Z
Available date
dc.date.available
2019-01-29T15:32:13Z
Publication date
dc.date.issued
1997
Cita de ítem
dc.identifier.citation
Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Volumen 56, Issue 4, 2018, Pages 4581-4590
Identifier
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1063651X
Identifier
dc.identifier.other
10.1103/PhysRevE.56.4581
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/161590
Abstract
dc.description.abstract
We study the parametric decays of a large amplitude, linearly polarized electromagnetic wave in an electron-positron plasma. We include harmonic generation, the ponderomotive force, and weakly relativistic effects. It is shown that when [Formula Presented] ([Formula Presented] is the electroacoustic velocity, [Formula Presented] is the speed of light, and [Formula Presented] is the phase velocity of the electromagnetic wave), there are two instabilities. One is an ordinary decay instability, in which the pump wave decays into a sideband wave, propagating backward relative to the pump wave, and an electroacoustic mode propagating forward. The other is an essentially electromagnetic nonresonant modulational instability (which is due to higher order effects of the pump wave amplitude), in which the pump wave decays into two sideband waves. When [Formula Presented] there is a modulational nonresonant instability, and an ordinary modulational instability, in which the pump wave decays into