Multidimensional Numerical Investigation of NIF Saturn PDD Designs with 3-D Laser Ray Tracing

Details Multidimensional Numerical Investigation of NIF Saturn PDD Designs with 3-D Laser Ray Tracing Multidimensional Numerical Investigation of NIF Saturn PDD Designs with 3-D Laser Ray Tracing

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aps..dppjo3010m&link_type=abstract

American Physical Society, 49th Annual Meeting of the Division of Plasma Physics, November 12-16, 2007, abstract #JO3.010

Physics

Plasma Physics

Scientific paper

The Laboratory for Laser Energetics continues to validate the use of the NIF and the LMJ in the x-ray-drive configuration for direct-drive-ignition experiments. Progress in this area indicates that polar direct drive (PDD) is a viable and attractive option for achieving ignition on these megajoule-class laser systems. Recent work has focused on the implementation of the Saturn PDD illumination scheme, which, employing an equatorial CH ring as a plasma lens, attempts to minimize target perturbations due to the absence of the equatorial beams in the x-ray-drive laser configuration. This paper will examine the implementation of the standard ``all-DT'' direct-drive-ignition design with a fixed CH equatorial ring. Previous work employed 2-D hybrid SAGE--DRACO calculations and indicated minimal performance degradation from 1-D results. We will report on recent 2-D hydrodynamic DRACO simulations, examining the effects of the Saturn PDD illumination as modeled with fully integrated 3-D ray-trace models. This work was supported by the U.S. Department of Energy Office of Inertial Confinement Fusion under Cooperative Agreement DE-FC52-92SF19460.

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