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Using Polar Direct Drive Experiments on the National Ignition Facility to Validate 2D Radiation-Hydrodynamic Energy Coupling Models

ORAL

Abstract

Polar-direct-drive (PDD) solid sphere experiments using 2.1-mm diameter CH targets were performed on the National Ignition Facility (NIF) to evaluate energy-coupling models in 2-D radiation-hydrodynamics codes. Data from the Scattered-Light Time-history Diagnostic (SLTD)[1] and the Full-Aperture Backscatter Stations (FABS) were used to measure time resolved scattered light at 350 to 351 nm (Stimulated Brillouin scattering). The trajectory of converging shocks and the resulting density profile was probed by a Cu backlighter and captured by gated x-ray detectors (GXD) to yield radiographs. A multiple-shock design was used to assess sensitivity to cross-beam energy transfer (CBET) during peak power. Comparison of the scattered light distribution and inferred density profiles to the radiation-hydrodynamics code DRACO, including cross beam energy transfer (CBET) and non-local heat transport models, will be discussed.

[1] M. J. Rosenberg et al., Rev. Sci. Instrum. 92, 033511 (2021).

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Presenters

  • Steven Kostick

    University of Rochester

Authors

  • Steven Kostick

    University of Rochester

  • Michael J Rosenberg

    Laboratory for Laser Energetics, University of Rochester, University of Rochester

  • Luke A Ceurvorst

    University of Rochester

  • P. B Radha

    Laboratory for Laser Energetics - Rochester, University of Rochester, Laboratory for Laser Energetics

  • John A Marozas

    Laboratory for Laser Energetics, University of Rochester

  • Joseph D Katz

    Laboratory for Laser Energetics, University of Rochester - Laboratory for Laser Energetics, University of Rochester

  • Timothy Filkins

    Laboratory for Laser Energetics, LLE, University of Rochester

  • Wolfgang R Theobald

    Focused Energy

  • Timothy J Collins

    Laboratory for Laser Energetics, University of Rochester, University of Rochester, University of Rochester; LLE, Laboratory for Laser Energetics, University of Rochester Laboratory for Laser Energetics

  • Sean P Regan

    Laboratory for Laser Energetics, University of Rochester

  • Nuno Candeias Lemos

    Lawrence Livermore Natl Lab, Lawrence Livermore National Lab, LLNL

  • Ellie Tubman

    Lawrence Livermore Natl Lab

  • Steven S Ross

    Lawrence Livermore Natl Lab, LLNL, Lawrence Livermore National Laboratory

  • Neil Butler

    Lawrence Livermore Natl Lab

  • George F Swadling

    Lawrence Livermore Natl Lab

  • Ricky Sommers

    Lawrence Livermore Natl Lab

  • Joel Stanley

    Lawrence Livermore Natl Lab

  • John D Moody

    Lawrence Livermore National Laboratory

  • Christine M Mariscal

    General Atomics