Observation of the Langmuir decay instability driven by stimulated Raman scattering

Journal Article · Fri Aug 01 04:00:00 EDT 1997 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.872436· OSTI ID:526933

Baker, K L; Drake, R P; Bauer, B S; Estabrook, K G; Rubenchik, A M ^[1]; Labaune, C; Baldis, H A; Renard, N; Baton, S D; Schifano, E; Michard, A ^[2]; Seka, W; Bahr, R E ^[3]

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1. Plasma Physics Research Institute, University of California Davis, and Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
2. Laboratoire pour LUtilisation des Lasers Intenses, CNRS, Ecole Polytechnique, Palaiseau (France)
3. University of Rochester, Rochester, New York 14627 (United States)

Thomson scattering was used to measure the Langmuir wave spectrum driven by stimulated Raman scattering. The Thomson scattering signals measured in the experiment showed Langmuir waves with components both parallel and antiparallel to the incident laser{close_quote}s wave vector, {bold k}{sub 0}. The parallel component was attributed to stimulated Raman scattering. However, the Langmuir waves with components antiparallel to {bold k}{sub 0}, which cannot be explained by stimulated Raman scattering, were attributed to the Langmuir decay instability (LDI). The relative amplitude of the two Langmuir wave features and their angular width supported the conclusion that the Langmuir waves traveling antiparallel to the incident laser{close_quote}s wave vector were driven by the Langmuir decay instability. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Lawrence Livermore National Laboratory
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 526933
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 4; ISSN 1070-664X; ISSN PHPAEN
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
LANGMUIR FREQUENCY
LASER RADIATION
PLASMA DIAGNOSTICS
PLASMA INSTABILITY
PLASMA WAVES
RAMAN EFFECT
THOMSON SCATTERING