Implementation of beam smoothing on the Nova laser

M. A. Henesian; D. F. Browning; S. N. Dixit; M. Haner; F. G. Patterson; M. D. Perry; H. T. Powell; I. M. Thomas; P. J. Wegner; T. L. Weiland; R. B. Wilcox; R. B. Woods

Conference on Lasers and Electro-Optics
OSA Technical Digest (Optica Publishing Group, 1991),
paper CTuI2

Implementation of beam smoothing on the Nova laser

M. A. Henesian, D. F. Browning, S. N. Dixit, M. Haner, F. G. Patterson, M. D. Perry, H. T. Powell, I. M. Thomas, P. J. Wegner, T. L. Weiland, R. B. Wilcox, and R. B. Woods

Conference on Lasers and Electro-Optics 1991

Baltimore, Maryland United States
12–17 May 1991
ISBN: 1-55752-189-1

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Beam Smoothing Techniques for Fusion Lasers (CTuI)

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M. A. Henesian, D. F. Browning, S. N. Dixit, M. Haner, F. G. Patterson, M. D. Perry, H. T. Powell, I. M. Thomas, P. J. Wegner, T. L. Weiland, R. B. Wilcox, and R. B. Woods, "Implementation of beam smoothing on the Nova laser," in Conference on Lasers and Electro-Optics, J. Bufton, A. Glass, T. Hsu, and W. Krupke, eds., Vol. 10 of OSA Technical Digest (Optica Publishing Group, 1991), paper CTuI2.

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Abstract

The two main approaches taken previously to attain the beam smoothness necessary for direct-drive inertial confinement fusion (ICF) have been using a random phase plate¹ to give a stationary, fine-scale speckle pattern at focus and a spatial incoherence to cause the speckle pattern to change in time [either induced spatial incoherence (ISI)² or smoothing by spectral dispersion (SSD)³]. We have implemented a version of SSD on one beamline of Nova at 0.527 μm, the modeling of which is described in a separate paper.⁴ Using this beam, we plan to do planar target experiments on hydrodynamic instability in collaboration with the University of Rochester, Laboratory of Laser Energetics (LLE).

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