Measurements of 3D hydrodynamic instabilities at ablation front in indirect-drive ICF implosions on NIF

ORAL

Abstract

Hydrodynamic instabilities are major factor in degradation of spherical implosions in inertial confinement fusion (ICF). Instabilities at ablation front are some key contributors to overall stability of x-ray driven implosions. We present results of hydrodynamic instability experiments with high-density-carbon (HDC) ablators on National Ignition Facility (NIF). The unstable growth of 3D perturbations was measured with x-ray radiography using Hydrodynamic Growth Radiography (HGR) platform and crystal backlighter imager (CBI). The dependence of the instability growth on initial perturbations at outer capsule surface will be presented.

*This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.

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Presenters

  • Vladimir Smalyuk

    • Lawrence Livermore Natl Lab
    • LLNL

Authors

  • Vladimir Smalyuk

    • Lawrence Livermore Natl Lab
    • LLNL

  • Chris Weber

    • Lawrence Livermore Natl Lab
    • LLNL
    • Lawrence Livermore National Laboratory

  • Gareth N Hall

    • Lawrence Livermore Natl Lab
    • LLNL
    • Lawrence Livermore National Laboratory

  • Otto L Landen

    • Lawrence Livermore Natl Lab
    • LLNL