New model of Raman spectra in laser produced plasma

Conference · Tue Jul 03 04:00:00 EDT 1984

OSTI ID:6821624

Simon, A; Short, R W

Experimental observations of Raman scttering in laser produced plasma can be explained by ordinary incoherent Thompson scattering, with a greatly enhanced plasma line. Transient local reversed-slope velocity distributions in the underdense region can be produced by pulses of hot electrons arising from the two-plasmon or absolute stimulated Raman instabilities (SRS-A) occurring near the quarter critical surface. A simple model yields the observed spectral gaps near the incident frequency ..omega../sub 0/ and near ..omega../sub 0//2. It also explains the correlation of onset of this scattering with onset of the SRS-A, its transient localization in frequency and time, and the weak azimuthal angular variation. The existence of an upscattered frequency band is also predicted and has been verified by experiment.

• Research Organization: Rochester Univ., NY (USA). Lab. for Laser Energetics
• DOE Contract Number: AC08-80DP40124
• OSTI ID: 6821624
• Report Number(s): DOE/DP/40124-22; CONF-840616-14; ON: DE84009625
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology
DECAY INSTABILITY
INELASTIC SCATTERING
INSTABILITY
LASER-PRODUCED PLASMA
MATHEMATICAL MODELS
PLASMA
PLASMA INSTABILITY
PLASMONS
QUASI PARTICLES
RAMAN EFFECT
SCATTERING
THOMSON SCATTERING