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Spatio-temporal evolution of two-plasmon decay in homogeneous plasma

Published online by Cambridge University Press:  30 November 2009

D. R. DIMITRIJEVIĆ  and
A. A. MALUCKOV
D. R. DIMITRIJEVIĆ
Affiliation:
Department of Physics, Faculty of Sciences and Mathematics, University of Niš, P. O. Box 224, 18001 Niš, Serbia (dimke@junis.ni.ac.rs)
A. A. MALUCKOV
Affiliation:
Department of Physics, Faculty of Sciences and Mathematics, University of Niš, P. O. Box 224, 18001 Niš, Serbia (dimke@junis.ni.ac.rs)
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Abstract

A hydrodynamic model of two-plasmon decay in a homogeneous plasma slab near the quarter-critical density is utilized to study the spatio-temporal evolution of the daughter electron plasma waves in plasma in the course of the instability. The influence of laser and plasma parameters on the evolution of the amplitudes of the participating waves is discussed, assuming that the secondary coupling of two daughter electron plasma waves with an ion-acoustic wave is the principal mechanism of saturation of the instability. The impact of inherently non-resonant nature of this secondary coupling on the development of TPD is investigated for the first time and it is shown to significantly influence the electron plasma wave dynamics. Its inclusion leads to non-uniformity of the spatial profile of the instability and causes the burst-like pattern of the instability development, which should result in the burst-like hot-electron production in homogeneous plasma.

Type
Papers
Information
Journal of Plasma Physics , Volume 76 , Issue 5 , October 2010 , pp. 749 - 761
Copyright
Copyright © Cambridge University Press 2009

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