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Effect of crossed beams irradiation on parametric instabilities

Published online by Cambridge University Press:  01 July 1999

C. LABAUNE
Affiliation:
Laboratoire pour l'Utilisation des Lasers Intenses, Ecole Polytechnique, Centre National de la Recherche Scientifique, 91128 Palaiseau cedex, France
H.A. BALDIS
Affiliation:
Institute for Laser Science and Applications (ILSA) Lawrence Livermore National Laboratory, POB 808, Livermore CA 94550, USA
B.S. BAUER
Affiliation:
Laboratoire pour l'Utilisation des Lasers Intenses, Ecole Polytechnique, Centre National de la Recherche Scientifique, 91128 Palaiseau cedex, France Present address Department of Physics, University of Nevada, Reno, USA.
E. SCHIFANO
Affiliation:
Laboratoire pour l'Utilisation des Lasers Intenses, Ecole Polytechnique, Centre National de la Recherche Scientifique, 91128 Palaiseau cedex, France
A. MICHARD
Affiliation:
Laboratoire pour l'Utilisation des Lasers Intenses, Ecole Polytechnique, Centre National de la Recherche Scientifique, 91128 Palaiseau cedex, France

Abstract

Modification of the growth of scattering processes in the case of multiple beam irradiation compared to single beam irradiation has been investigated in a preformed plasma using Thomson scattering of a short wavelength probe beam, and spectral and temporal analysis of reflected and transmitted light. First observations of the reduction of the amplitude of ion acoustic waves associated with simulated Brillouin scattering, amplification of the amplitude of electron plasma waves associated with stimulated Raman scattering, and transfer of energy between crossing beams with same frequency in a flowing plasma under crossed beam irradiation are reported.

Type
Research Article
Copyright
1999 Cambridge University Press

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