Measurements of laser-speckle-induced perturbations in laser-driven foils

Journal Article · Tue Oct 01 00:00:00 EDT 1996 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

DOI:https://doi.org/10.1103/PhysRevE.54.4473· OSTI ID:388260

Glendinning, S G; Dixit, S N; Hammel, B A; Kalantar, D H; Key, M H; Kilkenny, J D; Knauer, J P; Pennington, D M; Remington, B A; Wallace, R J; Weber, S V ^[1]

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1. Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (United States)

We have measured modulations imprinted by laser speckle in laser-driven CH{sub 2} foils at 10{sup 14} W/cm{sup 2} (laser wavelength 0.53 {mu}m). We have calibrated the amplitude and Rayleigh-Taylor growth of these modulations with single-mode surface perturbations, converting the imprint to an equivalent surface finish. We examined this imprint for a static speckle pattern and with two different bandwidths on the drive laser. The addition of bandwidth and dispersion to the drive laser reduced the imprinted modulations, with the highest bandwidth showing the largest reduction in imprint, in agreement with LASNEX simulations. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 388260
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 54, Issue 4; Other Information: PBD: Oct 1996
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
LASER TARGETS
IRRADIATION
MODULATION
INERTIAL CONFINEMENT
PELLETS
FOILS
SIMULATION
THERMONUCLEAR REACTIONS
SURFACES
SPECKLES
OBSERVABLES