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Improvements to the NIF opacity platform

ORAL

Abstract

National Ignition Facility (NIF) experiments to measure the x-ray opacity of elements important to the flow of energy in astrophysical systems and other high energy density plasma have been underway for a number of years. In the past year significant improvements have been made to the platform to reduce backgrounds, increase signal strength, expand the spectral coverage of the spectrometer, and increase the range of temperatures and densities over which the measurements can be taken. This presentation will describe these improvements and show the most recent data from experiments on oxygen and iron opacities. This work was performed under the U.S. Department of Energy LANL contract 89233218CNA000001, LLNL Contract No. DE-AC52-07NA27344, Sandia Contract No. DE-AC04-94AL85000, NNSS Contract No. DE-AC52-06NA25946, and Unversity of Texas Contract No. DE-NA0003843.

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Publication: Y.P. Opachich, et al., "DANTE as a primary temperature diagnostic for the NIF iron opacity campaign," Rev. Sci. Instrum. 92, 033519 (2021).<br>M.S. Wallace, et al., "Upgrades and redesign of the National Ignition Facility's soft x-ray opacity spectrometer (OpSpec)," Rev. Sci. Instrum. 92, 035108 (2021).<br>E.C. Dutra, et al., "Characterization of AGFA D4 and D3sc X-ray films in the 0.7 to 4.6 keV energy range," Rev. Sci. Instrum. 92, 075103 (2021).

Presenters

  • Theodore S Perry

    Los Alamos Natl Lab, Los Alamos National Laboratory, Los Alamos National Lab, Lawrence Livermore Natl Lab

Authors

  • Theodore S Perry

    Los Alamos Natl Lab, Los Alamos National Laboratory, Los Alamos National Lab, Lawrence Livermore Natl Lab

  • Robert F Heeter

    Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory

  • Heather M Johns

    Los Alamos Natl Lab, LANL

  • Yekaterina Opachich

    Lawrence Livermore Natl Lab

  • Harry F Robey

    Lawrence Livermore Natl Lab

  • Evan Dodd

    Los Alamos Natl Lab

  • Natalia Krasheninnikova

    Los Alamos National Laboratory, Los Alamos Natl Lab

  • Thomas Day

    Los Alamos Natl Lab, Los Alamos National Laboratory

  • Chris J Fontes

    Los Alamos National Laboratory, Los Alamos Natl Lab

  • Lynn Kot

    Los Alamos Natl Lab, Los Alamos National Laboratory, Los Alamos National Lab

  • Todd Urbatsch

    Los Alamos National Laboratory, Los Alamos National Lab, Los Alamos Natl Lab

  • Melissa R Douglas

    Los Alamos Natl Lab, Los Alamos National Laboratory

  • Brian G Wilson

    Lawrence Livermore Natl Lab, Retired

  • Carlos A Iglesias

    Lawrence Livermore Natl Lab

  • Eric Dutra

    Nevada National Security Site

  • Matt S Wallace

    Nevada National Security Site

  • Daniel C Mayes

    University of Texas - Austin, University of Texas at Austin, University of Texas, Austin, University of Nevada, Reno

  • Don E Winget

    University of Texas - Austin, University of Texas at Austin

  • Michael H Montgomery

    University of Texas - Austin, University of Texas at Austin, The University of Texas at Austin

  • James E Bailey

    Sandia National Laboratories