Stimulated Brillouin scattering in a plasma with a supersonic drift

Journal Article · Sat Sep 01 00:00:00 EDT 1979 · Sov. J. Plasma Phys. (Engl. Transl.); (United States)

OSTI ID:5610683

Kurin, V V; Permitin, G V

The stimulated scattering of an electromagnetic wave by the slow ion-acoustic branch is studied in a steady-state plasma slab with a directed ion drift. In certain ranges of the Mach number and the scattering angle, the stimulated scattering becomes an explosive amplification in the relaxation stage: The amplitude of the interacting waves increase faster than exponentially over space. The saturation level for the stimulated scattering during explosive amplification is determined by the nonlinear phase mismatch due to the slowing of the particle flow by ponderomotive forces. The variation of the transmission coefficient of the slab for the pump wave with the amplitude of this wave is multivalued. The multivaluedness disappears at very high pump amplitudes, and the transmission coefficient approaches unity. This suggests that the particular branch of the transmission coefficient which is assumed in the multivalued region depends on the rise time of the incident pulse. Rough estimates show that it would be possible in principle to observe explosive amplification for stimulated Brillouin scattering in a laser plasma under experimental conditions which have already been achieved.

• Research Organization: Institute of Applied Physics, Academy of Sciences of the USSR
• OSTI ID: 5610683
• Journal Information: Sov. J. Plasma Phys. (Engl. Transl.); (United States), Vol. 5:5
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTROMAGNETIC RADIATION
BRILLOUIN EFFECT
PLASMA
DECAY INSTABILITY
EXPLOSIVE INSTABILITY
LASER-RADIATION HEATING
NONLINEAR PROBLEMS
PARAMETRIC INSTABILITIES
SLABS
TRANSMISSION
COHERENT SCATTERING
HEATING
INSTABILITY
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RADIATIONS
SCATTERING
700108* - Fusion Energy- Plasma Research- Wave Phenomena