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Systematic Trends of Hot-Spot Flow Velocity in Laser-Direct-Drive Implosions on OMEGA

ORAL

Abstract

DT cryogenic targets and DT gas-filled, spherical plastic or glass targets are imploded on the OMEGA Laser System using laser-direct-drive inertial confinement fusion. The hot-spot flow velocity is diagnosed using multiple neutron time-of-flight detectors arranged along four quasi-orthogonal diagnostic lines of sight.[1] A systematic study of the magnitude and direction of the mode-1 asymmetry observed at stagnation[2] will be presented and possible seeds of mode-1 asymmetry from inaccuracies in beam pointing, beam-to-beam energy/power imbalance, inaccuracies in target positioning, laser–plasma interactions,[3] and target asymmetries will be discussed. It is shown that beam mispointing leads to a significant mode l = 1 illumination nonuniformity being the dominate cause for the hot-spot flow. With improved beam pointing, inaccuracies in target positioning and laser-plasma interactions are the leading causes for the hot-spot flow.
 
[1] O. M. Mannion et al., Rev. Sci. Instrum. 92, 033529 (2021).


[2] O. M. Mannion et al., Phys. Plasmas 28, 042701 (2020).


[3] D. H. Edgell et al., “Nonuniform Absorption and Scattered Light in Direct-Drive Implosions Driven by Polarization Smoothing,” to be published in Physical Review Letters.

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Presenters

  • 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

Authors

  • 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

  • Owen M Mannion

    University of Rochester, Laboratory for Laser Energetics, University 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

  • Hannah McClow

    Laboratory for Laser Energetics, University of Rochester

  • Zaarah L Mohamed

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

  • Adam Kalb

    Laboratory for Laser Energetics, University of Rochester

  • Joe Kwiatkowski

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

  • 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

  • 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

  • Vladimir Y Glebov

    Lab for Laser Energetics, University 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, Lab for Laser Energetics

  • Kristen Churnetski

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

  • Riccardo S Betti

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

  • 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

  • Igor V Igumenshchev

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

  • Radha Bahukutumbi

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

  • Valeri N Goncharov

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

  • Dana H Edgell

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

  • Joe D Katz

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

  • David Turnbull

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

  • Dustin H Froula

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

  • Mark J Bonino

    Laboratory for Laser Energetics, University of Rochester

  • David R Harding

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

  • Mike M Campbell

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

  • Claudia M Shuldberg

    General Atomics

  • Rain W Luo

    General Atomics

  • Martin Hoppe

    General Atomics

  • Arnaud Colaïtis

    CELIA, Centre Lasers Intenses et Applications, University of Bordeaux