Experiments to Study the Impact of the Beam-to-Target Ratio in Direct-Drive DT Cryogenic Implosions on OMEGA

ORAL

Abstract

Experimental data and theoretical modeling indicate that the performance of laser-direct-drive cryogenic DT inertial confinement fusion implosions depends strongly on the ratio between the radius of the beams that illuminate the shell and its radius (Rb/Rt). To quantitatively study this effect, a series of shots was performed with targets of varying radii. Both the laser intensity and the stability properties of the imploding target were kept constant in these experiments. Targets of 780-μm, 870-μm, and 1020-μm diameter were irradiated with 60 overlapped beams from the OMEGA laser, each having an intensity profile with a super-Gaussian shape of the order of ~5 and a 95% encircled energy diameter of ~850 μm, scanning Rb/Rt from ~1.09 to ~0.83. A comprehensive summary of the experimental observables from both neutron and x-ray detectors and a comparison with the theoretical modeling will be presented.

*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

  • Christian Stoeckl

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

Authors

  • Christian Stoeckl

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

  • Cliff A Thomas

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

  • Joshua Baltazar

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

  • K. A Bauer

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

  • Riccardo Betti

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

  • Duc Cao

    • Laboratory for Laser Energetics, U. of Rochester
    • U. Rochester/LLE
    • Laboratory for Laser Energetics, University of Rochester
    • University of Rochester

  • Kristen Churnetski

    • 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, University of Rochester

  • Chad J Forrest

    • Laboratory for Laser Energetics
    • Laboratory for Laser Energetics, University of Rochester
    • University of Rochester
    • Laboratory for Laser Energetics at the University of Rochester
    • Laboratory for Laser Energetics, U. 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 - Rochester
    • Laboratory for Laser Energetics, U. of Rochester
    • University of Rochester
    • Laboratory for Laser Energetics, University of Rochester

  • James P Knauer

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

  • Aarne Lees

    • 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

  • Michael J Rosenberg

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

  • Ka Ming M Woo

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