Recent results of the Defect-Induced Mix Experiments (DIME) on NIF

ORAL

Abstract

Investigations of directly driven implosions have been performed including experiments on Omega, and more recently NIF, to deduce the extent and uniformity of 4$\pi $ and defect-induced mix near the shell/gas interface of plastic (CH) capsules filled with 5 atm D$_{2}$ gas. Imaging diagnostics are used to measure the spatial variation of mix caused by the growth of non-uniformities in both capsule and laser drive characteristics. Thin (2$\mu $m) layers containing 1-2{\%} (atomic) mid-Z dopants are imaged spectrally at late time in the implosion using multiple monochromatic imaging of H-like and He-like atomic line emission. Areal image backlighting of the capsules provides both $r(t)$ and the symmetry of the implosion. Recent results will be shown including inferred 4$\pi $ mix width, laser imprint induced mix, and mix from capsule variations.

*This work is supported by US DOE/NNSA, performed at LANL, operated by LANS LLC under contract DE-AC52-06NA25396.

Authors

  • M.J. Schmitt

    • Los Alamos National Laboratory
  • P.A. Bradley

    • Los Alamos National Laboratory
  • J.A. Cobble

    • Los Alamos National Laboratory
  • P. Hakel

    • Los Alamos National Laboratory
  • Scott Hsu

    • Los Alamos National Laboratory
    • LANL
  • N.S. Krasheninnikova

    • Los Alamos National Laboratory
  • G.A. Kyrala

    • Los Alamos National Laboratory
  • T.J. Murphy

    • Los Alamos National Laboratory
  • K.A. Obrey

    • Los Alamos National Laboratory
  • R.C. Shah

    • Los Alamos National Laboratory
  • I.L. Tregillis

    • Los Alamos National Laboratory
  • R.S. Craxton

    • Laboratory for Laser Energetics, U. of Rochester
  • P.W. McKenty

    • Laboratory for Laser Energetics, U. of Rochester
  • Roberto Mancini

    • University of Nevada, Reno
    • Physics Department, University of Nevada, Reno
    • University of Nevada, Reno Physics Department
  • Heather Johns

    • University of Nevada, Reno
    • University of Nevada, Reno Physics Department
  • Tirtha Joshi

    • University of Nevada, Reno
    • University of Nevada, Reno Physics Department
  • Daniel Mayes

    • University of Nevada, Reno
    • University of Nevada, Reno Physics Department