First Observation of Ion Acoustic Waves Produced by the Langmuir Decay Instability

Journal Article · Mon Mar 27 00:00:00 EST 2000 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.84.2869· OSTI ID:20215864

Depierreux, S ^[1]; Fuchs, J ^[1]; Labaune, C ^[1]; Michard, A ^[1]; Baldis, H A ^[2]; Pesme, D ^[3]; Hueller, S ^[3]; Laval, G ^[3]

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1. Laboratoire pour l'Utilisation des Lasers Intenses, UMR 7605 CNRS-Ecole Polytechnique-CEA-Universite Paris VI, Ecole Polytechnique, 91128 Palaiseau Cedex, (France)
2. Institute for Laser Science and Applications (ILSA), Lawrence Livermore National Laboratory, P.O.B. 808, Livermore, California 94550 (United States)
3. Centre de Physique Theorique, UMR 7644 CNRS-Ecole Polytechnique, Ecole Polytechnique, 91128 Palaiseau Cedex, (France)

Thomson scattering measurements are presented which demonstrate conclusively the occurrence of the Langmuir decay instability (LDI) in a laser-produced plasma experiment. Both products of the instability, the ion acoustic wave and the electron plasma wave, were simultaneously observed and identified with their spectral characteristics. The secondary decay of the LDI-generated electron plasma wave, into another Langmuir wave and an ion acoustic wave, has been observed for the first time. The connection with growth and saturation of the stimulated Raman instability is discussed. (c) 2000 The American Physical Society.

• OSTI ID: 20215864
• Journal Information: Physical Review Letters, Vol. 84, Issue 13; Other Information: PBD: 27 Mar 2000; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA INSTABILITY
ION ACOUSTIC WAVES
THOMSON SCATTERING
LASER-PRODUCED PLASMA
ELECTRON PLASMA WAVES
INSTABILITY GROWTH RATES
EXPERIMENTAL DATA