Impact of Laser-Imprint on Direct-Drive Cryogenic Target Compression at OMEGA Using Statistics-Based Analysis with 2-D DRACO Simulations

ORAL

Abstract

We present ensemble comparisons between the measured and predicted areal density and yield from a database of high-resolution imprint simulations covering a wide space of implosions experiments. The 2-D simulation database includes imprint modes up to 150 and various levels of other perturbations (e.g. beam-port geometry, laser power imbalance, ice roughness, etc.), allowing us to quantify the impact of each on the predicted performance as well as obtain trends with respect to design parameters of interest. Simulations generally show a weak impact from imprint on implosions expected to have moderate stability (inflight adiabat>4, inflight-aspect-ratio<35) and, when compared to experiment, suggest the presence of an additional, significant degradation source(s). In addition to areal density and yield, laser imprint’s impact on other observables is also explored.

*This material is based upon work supported by the Department of Energy [National Nuclear Security Administration] University of Rochester "National Inertial Confinement Fusion Program" under Award Number DE-NA0004144.

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Presenters

  • Duc M Cao

    • Laboratory for Laser Energetics, University of Rochester
    • U. Rochester/LLE

Authors

  • Duc M Cao

    • Laboratory for Laser Energetics, University of Rochester
    • U. Rochester/LLE

  • Rahul C Shah

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

  • Cliff A Thomas

    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics
    • University of Rochester Laboratory for Laser Energetics (LLE)

  • Varchas Gopalaswamy

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

  • Aarne Lees

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

  • Riccardo Betti

    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energy, Rochester, NY, USA.

  • James P Knauer

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

  • Luke A Ceurvorst

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

  • Christian Stoeckl

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

  • Sean P Regan

    • Laboratory for Laser Energetics, University of Rochester

  • P. B Radha

    • Los Alamos National Laboratory
    • University of Rochester

  • Timothy J Collins

    • Laboratory for Laser Energetics, University of Rochester

  • Valeri N Goncharov

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