Laser-plasma instabilities and coherence control

Conference · Fri Aug 28 04:00:00 EDT 1992

OSTI ID:10159888

Baldis, H A; Moody, J D; Montgomery, D S; Estabrook, K G; Berger, R L; Williams, E A; Kruer, W L; Lasinski, B F; Dixit, S N; Woods, B; Henesian, M A; Hsieh, E J ^[1]; Labaune, C ^[2]; Batha, S H ^[3]

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1. Lawrence Livermore National Lab., CA (United States)
2. Ecole Polytechnique, 91 - Palaiseau (France)
3. California Univ., CA (United States). Plasma Physics Research Inst.

The authors experimentally investigate the effect of random phase plate (RPP) beam smoothing on Stimulated Brillouin Scattering (SBS) backscattered light in exploding foil plasmas. The experiments consist of measuring the backscattered SBS emission excited by an unsmoothed and a RPP smoothed interaction beam impinging on a preformed plasma. A Ti or CH plasma is preformed with typically 2500 J of 0.527 {mu}m RPP smoothed laser light with a square pulse of 1 ns. The interaction laser focuses on the center of the preformed plasma with a duration of 1 ns, 0.527 {mu}m wavelength, {approximately}2500 J, and an adjustable delay time. We measure at least 15 times less backscattered SBS energy with a RPP.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10159888
• Report Number(s): UCRL-JC--110329; CONF-920913--30; ON: DE93014117
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340
700411
BRILLOUIN EFFECT
EMISSION
INERTIAL CONFINEMENT
INERTIAL CONFINEMENT DEVICES
LASER RADIATION
LASER-PRODUCED PLASMA
PARAMETRIC INSTABILITIES
PLASMA INSTABILITY
PLASMA WAVES, OSCILLATIONS, AND INSTABILITIES
SCATTERING