Resonant Seeding of Stimulated Brillouin Scattering by Crossing Laser Beams

Baldis, H. A.; Labaune, C.; Schifano, E.; Renard, Nicolas; Michard, A.

doi:10.1103/physrevlett.77.2957

Cited by 31 publications

(29 citation statements)

References 8 publications

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“…Subsequently, the utility of TS was also demonstrated in laser-produced plasmas to measure electron temperatures and the characteristics of ion acoustic and electron plasma waves in a large number of studies using open-geometry disk and exploding foil plasmas (e.g., Refs. [33][34][35][36][37][38][39][40]. In experiments at the Nova laser facility we have verified the theoretical TS cross section calculations6*27~28…”

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confidence: 50%

Thomson scattering from laser plasmas

et al. 1999

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confidence: 50%

Thomson scattering from laser plasmas

et al. 1999

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“…[5][6][7][8][9][10][11][12][13][14][15][16] In this process, described as induced Brillouin scattering in Ref. 5, the beat wave generated by the interference pattern of two laser beams crossing at a half-angle s resonantly excites an ion acoustic wave ͑IAW͒ that can in turn transfer energy from one beam to another.…”

Section: Introductionmentioning

confidence: 99%

Energy transfer between laser beams crossing in ignition hohlraums

et al. 2009

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The full scale modeling of power transfer between laser beams crossing in plasmas is presented. A new model was developed, allowing calculations of the propagation and coupling of pairs of laser beams with their associated plasma wave in three dimensions. The complete set of laser beam smoothing techniques used in ignition experiments is modeled and their effects on crossed-beam energy transfer are investigated. A shift in wavelength between the beams can move the instability in or out of resonance and hence allows tuning of the energy transfer. The effects of energy transfer on the effective beam pointing and on symmetry have been investigated. Several ignition designs have been analyzed and compared, indicating that a wavelength shift of up to 2 Å between cones of beams should be sufficient to control energy transfer in ignition experiments.

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“…Multibeam interactions may change SBS thresholds and gains [12 -16], and SBS may be seeded by reflections or shared ion-acoustic waves. Previous multibeam SBS experiments have been performed in plasmas with peak densities below critical [3,17], and thus do not directly apply to direct-drive ICF conditions. Some experiments have reported seeding of SBS by electromagnetic (EM) waves provided by either a separate external laser source [3] or reflections from a separate plasma [6].…”

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confidence: 98%

Multibeam Stimulated Brillouin Scattering from Hot, Solid-Target Plasmas

et al. 2002

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We report on multibeam, laser-plasma interaction experiments in plasmas relevant to future direct-drive-ignition experiments. Six interaction beams are incident on preformed plasmas containing critical density. Stimulated Brillouin scattering (SBS) shows strong evidence of electromagnetic wave seeding of side- and backscattering. The data are also consistent with shared ion waves driven by the six symmetrically arranged interaction beams. Early SBS quenching is observed and attributed to the hydrodynamics of the plasma.

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Resonant Seeding of Stimulated Brillouin Scattering by Crossing Laser Beams

Cited by 31 publications

References 8 publications

Thomson scattering from laser plasmas

Thomson scattering from laser plasmas

Energy transfer between laser beams crossing in ignition hohlraums

Multibeam Stimulated Brillouin Scattering from Hot, Solid-Target Plasmas

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