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Convective laser filamentation instability in magnetized plasma
- Source :
- Canadian Journal of Physics. June 1, 2014, Vol. 92 Issue 6, p504, 5 p.
- Publication Year :
- 2014
-
Abstract
- The convective amplification of filamentation instability (FI) of electromagnetic waves traveling along the density ramp of a magnetized plasma is investigated. The generalized amplification factor of the instability in the presence of a DC-magnetic field is derived by obtaining the governing equations of the instability and using the slow-coupling technique to obtain an analytical expression for the amplification factor in weakly magnetized plasma. The result shows enhancement of the convective FI gain by the magnetic field, where the enhancement is stronger for lower equilibrium plasma density values. PACS Nos.: 47.85.Dh, 52.38.Hb, 52.38.-r, 52.50.Jm. Nous etudions l'amplification convective de l'instabilite de filamentation (FI) d'ondes electromagnetiques se propageant le long d'une rampe de densite de plasma magnetise. Le facteur d'amplification generalise en presence d'un champ magnetique DC est derive par l'obtention des equations directrices de l'instabilite et l'utilisation d'une technique de couplage lent afin d'obtenir une expression analytique pour le facteur d'amplification dans un plasma faiblement magnetise. Le resultat montre une augmentation du gain FI convectif du au champ magnetique, ou cette augmentation est plus forte pour des densites plus faibles de plasma a l'equilibre. [Traduit par la Redaction]<br />1. Introduction While propagating in the underdense region of the plasma, laser beams drive the parametric excitation of plasma modes leading to parametric instabilities. These may result in energy exchange [...]
Details
- Language :
- English
- ISSN :
- 00084204
- Volume :
- 92
- Issue :
- 6
- Database :
- Gale General OneFile
- Journal :
- Canadian Journal of Physics
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.380748068
- Full Text :
- https://doi.org/10.1139/cjp-2013-0086