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Computational Modeling of the Target Mounting Stalk in Direct-drive Implosions

ORAL

Abstract

The effect of the target-mounting stalk on the symmetry and performance of directly driven inertial confinement implosions has been a topic of open debate. Previous simulations have predicted up to 50% yield degradation caused by the presence of the stalk mount,[1][2] whereas experiments typically have shown little effect except when combined with target offset.[3] The stalk may contribute to implosion nonuniformity both via a mass perturbation arising from the stalk itself and the glue spot used to attach the stalk to the capsule, as well as through a shadowing of the laser beams incident on the capsule surface. We will investigate the impact of the mounting stalk through HYDRA simulations of OMEGA cryogenic implosions. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856.
 
[1] I. V. Igumenshchev et al., Phys. Plasmas 16, 082701 (2009).


[2] B. M. Haines et al., Phys. Plasmas 23, 072709 (2016).


[3] M. Gatu Johnson et al., Phys. Plasmas 27, 032704 (2020).

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Presenters

  • Kenneth Anderson

    Lab for Laser Energetics, University of Rochester

Authors

  • Kenneth Anderson

    Lab for Laser Energetics, University of Rochester

  • Edward C Hansen

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

  • John A Marozas

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

  • Timothy J Collins

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

  • Valeri N Goncharov

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

  • Michael M Marinak

    Lawrence Livermore Natl Lab

  • Scott M Sepke

    Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory