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High-Volume and -Adiabat Capsule (HVAC) experiments using advanced hohlraums

ORAL

Abstract

Recent experiments using advanced hohlraums have demonstrated 20-30% energy coupling, or 300-500kJ, to capsules with diameters 2.5-3.4mm on the NIF (Ping et al. Nature Phys. 15, 138, 2019; Phys. Plasmas, 27, 100702, 2020; Nuclear Fusion, 2021). Such a high energy coupling efficiency makes it possible to explore a single-shell volume ignition scheme named HVAC,  where the entire DT fuel forms a large hot spot and the confinement is provided by the remaining ablator shell (P. Amendt et al., Phys. Plasmas 27, 122708, 2020). The advantages over the conventional central hot spot ignition include lower convergence requirement, higher adiabat to suppress instabilities, less conduction loss, longer confinement time, and more tolerance to defects. 2D simulations have shown promising performance in yield, symmetry and instability mitigation. A set of NIF shots has been planned and the initial experimental results will be presented. The prospect of HVAC as a complementary path toward ignition will also be discussed. This work was performed under the auspices of the US DOE by LLNL under contract number DEAC52- 07NA27344.

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Publication: P. Amendt et al., Phys. Plasmas 27, 122708, 2020;<br>Y. Ping et al. Nature Phys. 15, 138, 2019;<br>Y. Ping et al. Phys. Plasmas, 27, 100702, 2020;<br>Y. Ping et al. Nuclear Fusion, accepted.

Presenters

  • Yuan Ping

    Lawrence Livermore Natl Lab, LLNL, Lawrence Livermore National Laboratory

Authors

  • Yuan Ping

    Lawrence Livermore Natl Lab, LLNL, Lawrence Livermore National Laboratory

  • Peter A Amendt

    Lawrence Livermore Natl Lab

  • Kevin L Baker

    Lawrence Livermore Natl Lab

  • Darwin Ho

    LLNL, Lawrence Livermore Natl Lab, Lawrence Livermore National Lab

  • Vladimir Smalyuk

    Lawrence Livermore Natl Lab, LLNL

  • Otto L Landen

    Lawrence Livermore Natl Lab, LLNL

  • John D Lindl

    Lawrence Livermore Natl Lab

  • David J Strozzi

    Lawrence Livermore Natl Lab, Lawrence Livermore National Lab

  • David N Fittinghoff

    Lawrence Livermore Natl Lab

  • Shahab Khan

    Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory, Livermore, CA

  • Annie L Kritcher

    LLNL, Lawrence Livermore National Laboratory, Lawrence Livermore Natl Lab, University of California, Berkeley

  • John D Moody

    Lawrence Livermore National Laboratory, Lawrence Livermore Natl Lab, LLNL, Lawrence Livermore National Lab

  • Arthur E Pak

    Lawrence Livermore Natl Lab

  • James S Ross

    Lawrence Livermore Natl Lab, LLNL, Lawrence Livermore National Lab

  • Michael Stadermann

    Lawrence Livermore Natl Lab

  • Robert E Tipton

    Lawrence Livermore Natl Lab

  • Brandon Woodworth

    Lawrence Livermore Natl Lab

  • Kevin D Meany

    Los Alamos National Laboratory, Los Alamos National Lab, Los Alamos Natl Lab