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On the dynamics of ponderomotive filamentation of laser beams in a plasma

Published online by Cambridge University Press:  09 March 2009

J. Limpouch ,
G. Lončar ,
I. G. Lebo  and
V. B. Rozanov
J. Limpouch
Affiliation:
Computer Physics Group, Faculty of Nuclear Science and Physical Engineering, Technical University of Prague, Břehová 7, 115 19 Prague 1, Czechoslovakia
G. Lončar
Affiliation:
Computer Physics Group, Faculty of Nuclear Science and Physical Engineering, Technical University of Prague, Břehová 7, 115 19 Prague 1, Czechoslovakia
I. G. Lebo
Affiliation:
Lebedev Physical Institute of Academy of Science, Moscow, U.S.S.R.
V. B. Rozanov
Affiliation:
Lebedev Physical Institute of Academy of Science, Moscow, U.S.S.R.
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Abstract

The influence of ponderomotive force-induced plasma motion on filamentation is examined, using both linear and non-linear descriptions. Although the time asymptote of the process is identical to the stationary convective amplification of filaments, the dynamics of the plasma response may have a serious impact on the transient behaviour of filamentation. The plasma motion contains large amplitude oscillations of inhomogeneities in the laser beam with maxima that substantially exceed the asymptotic value and temporary growth of the very narrow filaments, which cannot be amplified in the stationary approximation.

Type
Research Article
Information
Laser and Particle Beams , Volume 6 , Issue 2 , May 1988 , pp. 295 - 304
Copyright
Copyright © Cambridge University Press 1988

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