Convective Brillouin amplification in drifting plasmas

Journal Article · Fri Jan 01 04:00:00 EST 1982 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.863617· OSTI ID:5874467

Mitchel, G R; Johnston, T W; Grek, B

Previous work on the absolute instability of Brillouin scatter in drifting plasmas is extended to the case of convective amplification. It is found that, similar to temporal growth rates for the absolute instability, forward oblique scatter has the highest spatial gain, with backscatter near a minimum. To agree with experimental results on outward scattered light, source terms are required which must be many orders of magnitude above thermal. Although in the heavy ion damping regime self-limiting via ion heating decreases the sensitivity of the final reflectivity to the source strength, there is no evidence of a scattering limit when pump depletion is small (the normal experimental situation).

• Research Organization: INRS-Energie, Varennes, Quebec, Canada J0L 2P0
• OSTI ID: 5874467
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 25:1; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
AMPLIFICATION
BRILLOUIN EFFECT
COHERENT SCATTERING
CONVECTION
DAMPING
GAIN
GEOMETRY
INSTABILITY
ION ACOUSTIC WAVES
ION WAVES
MACH NUMBER
MATHEMATICS
PLASMA DENSITY
PLASMA DRIFT
PLASMA INSTABILITY
PLASMA WAVES
SCATTERING
TEMPERATURE DEPENDENCE
VELOCITY