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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.

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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