NIF capsule modeling

ORAL

Abstract

Implosions have been carried out at the National Ignition Facility (NIF) of three capsule types, symmetry capsules (SymCaps), convergent ablation capsules. and THD capsules. These capsules are surrogates of the ignition capsule design, each optimized to measure specific implosion characteristics. In addition, shock timing data was obtained with specially-designed targets. An abundance of capsule performance data has been obtained with x-ray and nuclear diagnostics, including implosion velocity, remaining ablator mass, times of peak x-ray and neutron emission, core image size, core symmetry, neutron yield, and x-ray spectra. We have attempted to match this data set with simulations, adjusting the radiation drive, capsule surface roughness, and physics uncertainties. Comparison of simulated and measured performance parameters will be shown.

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Authors

  • S.V. Weber

    Lawrence Livermore National Laboratory, Lawrence Livermore National Lab, LLNL

  • C.J. Cerjan

    LLNL

  • M.J. Edwards

    Lawrence Livermore National Laboratory, LLNL

  • Damien Hicks

    LLNL, Lawrence Livermore National Laboratory

  • H. Robey

    Lawrence Livermore National Laboratory, LLNL

  • P.T. Springer

    LLNL

  • Brian Spears

    LLNL, Lawrence Livermore National Laboratory

  • R.P.J. Town

    LLNL

  • G. Kyrala

    Los Alamos National Laboratory, Lawrence Livermore National Laboratory, LANL

  • D.C. Wilson

    LANL

  • R.E. Olson

    SNL