Transient Development of Backward Stimulated Raman and Brillouin Scattering on a Picosecond Time Scale Measured by Subpicosecond Thomson Diagnostic

Journal Article · Fri Jul 07 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.97.015001· OSTI ID:20777380

Rousseaux, C; Gremillet, L; Casanova, M; Loiseau, P; Rabec Le Gloahec, M; Baton, S D; Amiranoff, F; Adam, J C; Heron, A ^[1]

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1. Commissariat a l'Energie Atomique, Direction d'Ile de France, 91680 Bruyeres-le-Chatel (France)

The excitation and the relaxation of the plasma waves and ion acoustic waves (IAW), respectively, driven by stimulated Raman (SRS) and Brillouin (SBS) backscatterings have been experimentally investigated with short-pulse lasers. The spectra have been obtained with a 0.3 ps time resolution. It is shown that SRS develops before SBS and suddenly decays around the peak of the pump, as the IAW reaches saturation. On this short time scale, electron kinetic effects play a major role for SRS saturation, contrary to ion dynamics. These results are supported by particle-in-cell simulations.

• OSTI ID: 20777380
• Journal Information: Physical Review Letters, Vol. 97, Issue 1; Other Information: DOI: 10.1103/PhysRevLett.97.015001; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BACKSCATTERING
BRILLOUIN EFFECT
ELECTRONS
EXCITATION
ION ACOUSTIC WAVES
PULSES
RAMAN SPECTRA
RELAXATION
SATURATION
SIMULATION
TIME RESOLUTION