Post-Shot Lasnex Simulations of NOVA Smooth Beam Symmetry Experiments with Thin-Wall Hohlraums

Details Post-Shot Lasnex Simulations of NOVA Smooth Beam Symmetry Experiments with Thin-Wall Hohlraums Post-Shot Lasnex Simulations of NOVA Smooth Beam Symmetry Experiments with Thin-Wall Hohlraums

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aps..dppoto103p&link_type=abstract

American Physical Society, Division of Plasma Physics Meeting, November 17-21, 1997, abstract #oThaO103.

Physics

Plasma Physics

Scientific paper

A recent series of experiments using gas filled hohlraums was performed at the Nova laser facility at Lawrence Livermore National Laboratory using KPP smoothed beams. Earlier experiments with un-smoothed beams showed that the radiation symmetry measured by capsule implosions did not agree well with Lasnex predictions unless the pointings of the laser beams were adjusted to account for time-dependent laser beam bending. The recent experiments with smoothed beams nearly agree with the pre-shot Lasnex predictions presented previously. Making adjustments to conform to experimental conditions, we have compared calculated hot spot positions and shapes with those observed in the experiments. We have also tested the time-integrated radiation symmetry through comparisons of measured and calculated capsule implosion symmetry. The improved agreement between experiments and Lasnex simulations adds confidence that symmetry can be predicted in beam phasing experiments and in NIF targets.

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