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Laser uniformity and hydrodynamic stability experiments at the OMEGA laser facility

  • T.R. BOEHLY (a1), A. BABUSHKIN (a1), D.K. BRADLEY (a2), R.S. CRAXTON (a1), J.A. DELETTREZ (a1), R. EPSTEIN (a1), T.J. KESSLER (a1), J.P. KNAUER (a1), R.L. McCRORY (a1), P.W. McKENTY (a1), D.D. MEYERHOFER (a1), S. REGAN (a1), W. SEKA (a1), S. SKUPSKY (a1), V.A. SMALYUK (a1), R.P.J. TOWN (a1) and B. YAAKOBI (a1)...

Abstract

Experiments to demonstrate the effects of various beam-smoothing techniques have been performed on the 60-beam, 30-kJ UV OMEGA laser system. These include direct measurements of the effect beam-smoothing techniques have on laser beam nonuniformity and on both planar and spherical targets. Demonstrated techniques include polarization smoothing and “dual-tripler” third-harmonic generation required for future broad bandwidth (∼1 THz) smoothing by spectral dispersion (SSD). The effects of improvements in single-beam uniformity are clearly seen in the target-physics experiments, which also show the effect of the laser pulse shape on the efficacy of SSD smoothing. Saturation of the Rayleigh-Taylor (RT) growth of the broad-bandwidth features, in agreement with the Haan model (Haan, 1989), produced by laser imprinting has also been observed.

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Corresponding author

Address correspondence and reprint requests to: T.R. Boehly, University of Rochester, Laboratory for Laser Energetics, 250 East River Road, Rochester, NY 14623-1299. E-mail: trb@lle.rochester.edu

Laser uniformity and hydrodynamic stability experiments at the OMEGA laser facility

  • T.R. BOEHLY (a1), A. BABUSHKIN (a1), D.K. BRADLEY (a2), R.S. CRAXTON (a1), J.A. DELETTREZ (a1), R. EPSTEIN (a1), T.J. KESSLER (a1), J.P. KNAUER (a1), R.L. McCRORY (a1), P.W. McKENTY (a1), D.D. MEYERHOFER (a1), S. REGAN (a1), W. SEKA (a1), S. SKUPSKY (a1), V.A. SMALYUK (a1), R.P.J. TOWN (a1) and B. YAAKOBI (a1)...

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