SAGE Hydrodynamic Simulations of Scattered Light from Direct-Drive Implosions of Large-Diameter Targets at the National Ignition Facility

ORAL

Abstract

The 2-D hydrodynamics code SAGE, which includes 3-D ray tracing, has been used to model scattered light from polar-direct-drive implosions at the National Ignition Facility. Predictions have been compared with the full-aperture backscatter station (FABS) diagnostic and the scattered-light time-history diagnostic (SLTD).[1],[2] For a shot with a picket pulse, the three-peaked predicted scattered-light time history agrees closely in an absolute comparison with the FABS (Q36B) at 50° from the south pole; analysis of the simulations shows which laser beams contribute unabsorbed light to the detector at different times. Predictions of the angular dependence are generally consistent with the SLTD diagnostics. For a 4-mm CH low-convergence implosion (N190227-001),[3] FABS measurements are consistent with the predicted absorption of ~95%. Ongoing improvements to the absolute calibration will allow these detectors to more tightly constrain hydrodynamic modeling. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856.

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


[2] S. Kostick et al., this meeting.


[3] C. B. Yeamans et al., Nucl. Fusion 61, 046031 (2021).





–

Presenters

  • Stephen Craxton

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

Authors

  • Stephen Craxton

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

  • 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

  • Anirudh Sharma

    • University of Rochester
    • Cornell University

  • Emma M Garcia

    • University 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

  • 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

  • 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

  • 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

  • Charles B Yeamans

    • Lawrence Livermore Natl Lab