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Laser-Direct-Drive Cryogenic Implosion Performance on OMEGA Versus Target and Laser-Spot Radius

ORAL

Abstract

Advances in statistical modeling of laser-direct-drive (LDD) implosions have led to record fusion yields on the OMEGA laser.[1,2] Experiments on the NIF have shown Si dopant and wavelength detuning can mitigate hot-electron preheat and cross-beam energy transfer (CBET).[3,4] Applying these concepts to ignition-scale LDD requires an understanding of performance as a function of physical size (using scale factor S = Rt/RW, the ratio of target radius to a fiducial OMEGA target radius) and the beam-to-target radius (defined as R = Rb/Rt). We show the measured fusion yield Y and areal density ρR increase with capsule size as S5.0±0.2 and S1.6±0.2, respectively, in excess of simple 1-D expectations (Y~S4.3, and ρR~S1.0). Neutron production also increases with beam to target radius as R3.5±0.5, with benefits that saturate at R~1. Both results imply that target and relative beam size mitigate sources of degradation and improve confinement. DRACO simulations including nonlocal transport and CBET[5] show these trends are expected when laser imperfections (e.g., speckles, port geometry) are a primary source of perturbations in 2/3-D. To test this hypothesis, we have also performed implosions with improved stability, and find higher yields and areal densities. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856.
 
[1] V. Gopalaswamy et al., Nature 565, 581 (2019).


[2] A. Lees, Bull. Am. Phys. Soc. 65, TI01.00005 (2020).


[3] A. A. Solodov et al., Phys. Plasmas 27, 052706 (2020).


[4] J. A. Marozas et al., Phys. Rev. Lett. 120, 085001 (2018).


[5] P. B. Radha et al., Phys. Plasmas 12, 032702 (2005).

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Presenters

  • Cliff A Thomas

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

Authors

  • Cliff A Thomas

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

  • Wolfgang R Theobald

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

  • James P Knauer

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

  • Christian Stoeckl

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

  • 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

  • Riccardo Betti

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

  • Edward M Campbell

    University of Rochester

  • Kenneth Anderson

    Lab for Laser Energetics, University of Rochester

  • K. A Bauer

    University of Rochester

  • Duc M Cao

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

  • Stephen Craxton

    University of Rochester, LLE

  • Dana H Edgell

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

  • Reuben Epstein

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

  • Chad J Forrest

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

  • Vladimir Y Glebov

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

  • Varchas Gopalaswamy

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

  • Igor V Igumenshchev

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

  • Steven T Ivancic

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

  • Douglas W Jacobs-Perkins

    University of Rochester

  • Roger T Janezic

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

  • Tirtha R Joshi

    Lab for Laser Energetics, University of Rochester

  • Joe Kwiatkowski

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

  • Aarne Lees

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

  • Owen M Mannion

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

  • Frederic J Marshall

    University of Rochester

  • Michael Michalko

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

  • Zaarah L Mohamed

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

  • Dhrumir P Patel

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

  • Jonathan L Peebles

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

  • Radha B Bahukutumbi

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

  • Sean P Regan

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

  • Hans Rinderknecht

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

  • Michael J Rosenberg

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

  • Siddharth Sampat

    University of Rochester

  • Thomas C Sangster

    University of Rochester

  • Rahul C Shah

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

  • Kevin L Baker

    Lawrence Livermore Natl Lab

  • Annie L Kritcher

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

  • Max Tabak

    Lawrence Livermore Natl Lab

  • Mark C Herrmann

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

  • Alison R Christopherson

    Laboratory for Laser Energetics, U. of Rochester, Lawrence Livermore National Laboratory, LLNL, Lawrence Livermore Natl Lab