Effects of plasma long-wavelength hydrodynamical fluctuations on stimulated Brillouin scattering

Journal Article · Wed May 01 04:00:00 EDT 1996 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871679· OSTI ID:282890

Maximov, A V; Rozmus, W; Tikhonchuk, V T ^[1]; DuBois, D F; Rose, H A ^[2]; Rubenchik, A M ^[3]

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1. Theoretical Physics Institute, Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2J1 (CANADA)
2. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. Department of Applied Sciences, University of California Davis, Livermore, California 94550 (United States)

Two important effects of long wavelength velocity and density perturbations on stimulated Brillouin scattering (SBS) have been identified: (i) nonlinear interaction of the SBS-produced ion acoustic wave with velocity perturbations provides detuning of the SBS interaction, formation of ion acoustic wave satellites and its additional damping; (ii) harmonic generation of long wavelength density perturbations enhances the spectral density of ion acoustic fluctuations over a wide range of wavevectors, including SBS resonant sound waves. The first effect reduces the magnitude of the SBS gain, and the second one enhances the nonthermal noise level for SBS. Long wavelength ion acoustic perturbations reduce SBS reflectivity more dramatically than short wavelength harmonics produced by the SBS driven nonlinear sound wave. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 282890
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 3; ISSN 1070-664X; ISSN PHPAEN
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM-PLASMA SYSTEMS
BRILLOUIN EFFECT
FLUCTUATIONS
HARMONIC GENERATION
ICF DEVICES
ION ACOUSTIC WAVES
LASER RADIATION
LASER-RADIATION HEATING
LIGHT SCATTERING