Small-Scale Mix in Direct-Drive Cryogenic DT Implosions on OMEGA

ORAL

Abstract

Mix on scales below the spatial resolution of conventional x-ray imagers (5 to 10 μm) in direct-drive cryogenic DT implosions on OMEGA is studied using time-gated (~20 ps), narrowband, soft x-ray (1865 eV) backlighting. The large opacity difference between DT and the carbon from the plastic ablator, which encapsulates the DT ice layer, makes this radiography setup very sensitive to ablator material mixed into the DT close to peak neutron production. The radiography data shows a strong correlation of the mix signatures with the adiabat (α = Pshell/Pfermi) and the in-flight aspect ratio of the implosion design. Details of the radiography setup including work to improve the brightness of the backlighter and the spatial resolution of the imager will also be presented.

*This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0001944.

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Presenters

  • Christian Stoeckl

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

Authors

  • Christian Stoeckl

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

  • Timothy J Collins

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

  • Reuben Epstein

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

  • Valeri N Goncharov

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

  • Robert Jungquist

    • Univ of Rochester
    • Laboratory for Laser Energetics

  • Chad Mileham

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

  • Radha Bahukutumbi

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

  • Sean P Regan

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

  • Thomas C Sangster

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

  • Wolfgang R. Theobald

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