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Instability and dynamics of two nonlinearly coupled laser beams in a two-temperature electron plasma
Umeå University, Faculty of Science and Technology, Department of Physics. Institut für Theoretische Physik IV and Centre for Plasma Science and Astrophysics.
2006 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, E-ISSN 1550-2376, Vol. 74, no 4, 046401Article in journal (Refereed) PublishedText
Abstract [en]

We consider nonlinear interactions between two colliding laser beams in an electron plasma, accounting for the relativistic electron mass increase in the laser fields and radiation pressure driven electron-acoustic (EA) perturbations that are supported by hot and cold electrons. By using the hydrodynamic and Maxwell equations, we obtain the relevant equations for nonlinearly coupled laser beams and EA perturbations. The coupled equations are then Fourier analyzed to obtain a nonlinear dispersion relation. The latter is numerically solved to show the existence of new classes of the parametric instabilities in the presence of two colliding laser beams in a two-electron plasma. The dynamics of nonlinearly coupled laser beams in our electron plasma is also investigated. The results should be useful in understanding the nonlinear propagation characteristics of multiple electromagnetic beams in laser-produced plasmas as well as in space plasmas.

Place, publisher, year, edition, pages
American physical society , 2006. Vol. 74, no 4, 046401
Keyword [en]
electromagnetic waves, parametric instabilities, inhomogeneous plasma, magnetized plasmas, stimulated raman, rarefied plasma, acoustic waves, scattering, excitation, intense
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:umu:diva-119378DOI: 10.1103/PhysRevE.74.046401ISI: 000241723000059OAI: oai:DiVA.org:umu-119378DiVA: diva2:928631
Available from: 2016-05-16 Created: 2016-04-18 Last updated: 2016-05-16Bibliographically approved

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Shukla, Padma Kant
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Department of Physics
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