Coupling of stimulated Raman and Brillouin scattering in a plasma

Journal Article · Sun Jan 01 04:00:00 EST 1989 · Phys Fluids B; (United States)

DOI:https://doi.org/10.1063/1.859085· OSTI ID:6547856

Umstadter, D; Mori, W B; Joshi, C

The observation of an anti-Stokes satellite in the spectrum of light backscattered from a CO/sub 2/ laser plasma is reported. Its origin is found to be Thomson scattering of the incident light from a counterpropagating mode-coupled plasma wave. The parent electron and ion waves in the mode-coupling process were driven by stimulated Raman and Brillouin backscattering. The parent and daughter plasma waves were detected by ruby laser Thomson scattering. A computer simulation modeling the experiment shows further cascading of the Stokes backscattered light to lower frequencies, apparently a result of its rescattering from another, higher phase velocity, counterpropagating coupled mode. Comparisons with theoretical predictions are presented.

• Research Organization: University of California, Los Angeles, California 90024
• OSTI ID: 6547856
• Journal Information: Phys Fluids B; (United States), Journal Name: Phys Fluids B; (United States) Vol. 1:1; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102 -- Fusion Energy-- Plasma Research-- Diagnostics
700107* -- Fusion Energy-- Plasma Research-- Instabilities
BACKSCATTERING
BRILLOUIN EFFECT
CARBON DIOXIDE LASERS
COHERENT SCATTERING
COMPUTERS
COUPLING
ELECTRON PLASMA WAVES
GAS LASERS
INELASTIC SCATTERING
ION WAVES
LASERS
LIGHT SCATTERING
NONLINEAR PROBLEMS
OSCILLATION MODES
PLASMA
PLASMA WAVES
RAMAN EFFECT
RUBY LASERS
SCATTERING
SIMULATION
SOLID STATE LASERS
THOMSON SCATTERING