Intensity scaling and saturation of stimulated Raman forward scattering

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870654· OSTI ID:7270305

Batha, S H; Bradley, K S; Drake, R P; Estabrook, K; Kruer, W L; Montgomery, D S; Remington, B A ^[1]

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1. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)

The intensity scaling of stimulated Raman forward scattering has been measured in preformed laser-produced plasmas. It was found that predictions based on linear convective theory were consistent with the amount of scattered light measured when the laser intensity was less than about 1[times]10[sup 15] W/cm[sup 2]. No increase in the amount of scattered light was found for higher intensities. The measured saturation level is compared to several nonlinear models: pump depletion, coupling to Langmuir and ion-acoustic waves, ponderomotive detuning, wave breaking, and particle trapping. It is found that saturation models based on ponderomotive detuning and on coupling to Langmuir and ion-acoustic waves are consistent with the experiment.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7270305
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 1:6; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340 -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
700350* -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
HEATING
ION ACOUSTIC WAVES
ION WAVES
LASER-PRODUCED PLASMA
LIGHT SCATTERING
PLASMA
PLASMA HEATING
PLASMA WAVES
PONDEROMOTIVE FORCE
RAMAN EFFECT
SATURATION
SCALING
SCATTERING