Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Physics of Plasmas
7 (2000), S. 4259-4265
ISSN:
1089-7674
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Collective Thomson scattering imaging has been used to study the propagation and self-focusing processes taking place during the interaction of a nanosecond laser beam with a preionized gas-jet plasma. The experiments have been carried out with a laser beam power PL exceeding greatly the critical power for ponderomotive self-focusing Pc. It has been found that the position of the ion acoustic waves excited by stimulated Brillouin scattering depends only weakly on the initial focal position of the interaction laser beam. These results, together with theoretical and numerical modeling, demonstrate that in such a regime (PL/Pc(very-much-greater-than)1) self-focusing is the dominant mechanism governing the localization of the interaction processes. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1290594
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