Three-Dimensional Hot-Spot Reconstruction from Cryogenic Deuterium-Tritium Polar-Direct-Drive Implosions on OMEGA

ORAL

Abstract

The impact of laser drive asymmetry on the hot-spot shape in the polar-direct drive (PDD) beam-pointing scheme has been studied on OMEGA. The capsules were illuminated with varying ring-energy partitions while keeping the total laser energy constant, and a significant mode-2 asymmetry in the hot-spot emission was observed. Causal effects from the laser drive show the expected change in hot-spot shape from prolate to oblate. A quantitative analysis of the hot-spot shape asymmetry was performed using a 3-D elliptical model of the hot-spot emission projected into multiple quasi-orthogonal lines of sight of the x-ray imagers and compared to the measurements. The temporal evolution of the hot-spot shape will be investigated. Proof-of-principle simulations with the hydrodynamic code DEC3D [K. M. Woo et al., Phys. Plasmas 25, 052704 (2018)] assuming a mode-2 perturbation were used to demonstrate the above 3-D reconstruction procedure using synthetic x-ray images. Higher-fidelity 3-D reconstructions of the hot spot will be performed using a spherical-harmonic decomposition algorithm.

*This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856.

–

Presenters

  • Kristen Churnetski

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

Authors

  • Kristen Churnetski

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

  • Ka Ming Woo

    • Lab for Laser Energetics
    • Laboratory for Laser Energetics, 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

  • 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

  • Riccardo Betti

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

  • Michael Michalko

    • Laboratory for Laser Energetics, University of Rochester
    • 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

  • 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

  • Cliff A Thomas

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