Computational Studies of the Mounting Stalk Diameter in Direct-Drive Implosions

ORAL

Abstract

The target mounting stalk is a notable source of asymmetry in direct-drive implosions that is rarely modeled, and when modeled is generally either in 2-D or a limited 3-D geometry and/or with a simplified treatment of laser-energy propagation. A 3-D simulation platform has been developed in HYDRA to model the effect of the target mounting stalk in a full-sphere, 4p geometry with no grid symmetry assumptions and with a fully 3-D treatment of laser propagation. The effect of beam shadowing using this platform was previously discussed for a 17-mm-diam stalk.[1] A new study showing the effect of varying stalk diameter on symmetry and yield will be presented. The effect of the glue spot attaching the stalk to the capsule will also be discussed.

[1] K. S. Anderson et al., Bull. Am. Phys. Soc., JO04.00003 (2021).

*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

  • Kenneth Anderson

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

Authors

  • Kenneth Anderson

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

  • Eddie C Hanson

    • University of Rochester

  • John A Marozas

    • Laboratory for Laser Energetics, University of Rochester

  • Timothy J Collins

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

  • Valeri N Goncharov

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

  • Michael M Marinak

    • Lawrence Livermore Natl Lab

  • Scott M Sepke

    • Lawrence Livermore Natl Lab