Using Scattered-Light Data to Validate 2-D Radiation-Hydrodynamic Energy-Coupling Models in Polar-Direct-Drive Implosions at the National Ignition Facility

ORAL

Abstract

Data from the scattered-light time-history diagnostic (SLTD)[1] and the full-aperture backscatter stations (FABS) at the National Ignition Facility (NIF) have been analyzed and used to evaluate 2-D radiation-hydrodynamic energy-coupling models in polar-direct-drive (PDD)[2] inertial confinement fusion experiments. The SLTD array consists of 11 (eventually 15) units mounted at a variety of polar and azimuthal angles in the NIF target chamber. The FABS array consists of eight units mounted in the southern hemisphere in two quads. Both FABS and SLTD units measure time-resolved scattered light in different wavelength bands: stimulated Brillouin scattering (SBS) (350 to 352 nm) and stimulated Raman scattering (400 to 750 nm). The SBS data have been compared with predictions from the hydrodynamics codes SAGE and DRACO for PDD experiments including CH shell implosions and solid spheres. DRACO includes the effects of cross-beam energy transfer. The evaluation of time-resolved and angular-resolved SBS data will be discussed.

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

2. M. Hohenberger et al., Phys. Plasmas 22, 056308 (2015).

*This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856.

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Presenters

  • Steven Kostick

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

Authors

  • Steven Kostick

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

  • Michael J Rosenberg

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

  • Radha P Bahukutumbi

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

  • John A Marozas

    • Laboratory for Laser Energetics, University of Rochester

  • Stephen Craxton

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

  • Anirudh Sharma

    • University of Rochester
    • Cornell University

  • Joseph D Katz

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

  • T. Filkins

    • LLE
    • Lab for Laser Energetics
    • Laboratory for Laser Energetics, University of Rochester, Rochester, New York, USA
    • University of Rochester
    • Laboratory for Laser Energetics, University of Rochester

  • Wolfgang R Theobald

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

  • Timothy J Collins

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

  • Sean P Regan

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

  • Nuno Lemos

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

  • Eleanor Tubman

    • Lawrence Livermore Natl Lab

  • Steven S Ross

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Neil Butler

    • Lawrence Livermore Natl Lab

  • George F Swadling

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

  • Ricky Sommers

    • Lawrence Livermore Natl Lab

  • Joel Stanley

    • Lawrence Livermore Natl Lab

  • John D Moody

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab