Polar-Driven Implosions on OMEGA: Observations and Simulations of Low-Mode Perturbations in the Main Fuel Layer and Hot Spot

ORAL

Abstract

Low-adiabat, directly driven implosion experiments have been performed on OMEGA using 40 beams in the polar-drive configuration, emulating the configuration of the beams of the NIF. The targets are non-cryogenic, D$_{2}$-gas-filled CH capsules. The areal-density time history of the CH shell and its low-mode perturbations are determined from x-ray radiographs. The conditions of the central fuel region are diagnosed with particle measurements including neutron yield and time history, while low-mode perturbations of the hot spot are determined from framed images of the hot spot's x-ray emission. The observed perturbations are compared with simulations using the 2-D hydrocode \textit{DRACO}. This work was supported by the U.S. Department of Energy Office of Inertial Confinement Fusion under Cooperative Agreement No. DE-FC52-08NA28302.

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Authors

  • F.J. Marshall

    • Laboratory for Laser Energetics, U. of Rochester

  • R.S. Craxton

    • Laboratory for Laser Energetics, U. of Rochester

  • R. Epstein

    • Laboratory for Laser Energetics, U. of Rochester

  • V.Yu. Glebov

    • Laboratory for Laser Energetics, U. of Rochester

  • V.N. Goncharov

    • Laboratory for Laser Energetics, U. of Rochester

  • J.P. Knauer

    • Laboratory for Laser Energetics, U. of Rochester

  • P.W. McKenty

    • Laboratory for Laser Energetics, U. of Rochester

  • P.B. Radha

    • Laboratory for Laser Energetics, U. of Rochester

  • A. Shvydky

    • Laboratory for Laser Energetics, U. of Rochester

  • J.A. Frenje

    • PSFC, MIT

  • C.K. Li

    • PSFC, MIT

  • R.D. Petrasso

    • PSFC, MIT

  • F.H. S\'{e}guin

    • PSFC, MIT