Results from the Opacity-on-the-National Ignition Facility Project: Comparison of Simulated and Experimental Opacities

ORAL

Abstract

Los Alamos and Livermore National Labs are engaged in a series of experiments on the National Ignition Facility to produce opacity data for iron and oxygen at conditions of 150 to 180 eV and 0.7 to 3.0 x 1022 electrons/cm3 to resolve a long-standing discrepancy between experimental data from the Z-machine and modern theoretical opacity calculations. The results could also impact models for the base of the Solar convection zone. Forward modeling of the experiment is important for characterizing backgrounds, interpreting the experimental results, and predicting the benefit of the time-gated spectroscopy over time-integrated. Here we report on initial simulations of NIF opacity samples using the radiation-hydrodynamic code xRAGE that have been post-processed with time dependence to determine how the desired spectral features of oxygen and iron compare with the background noise within the hohlraum.

*This work was supported by the US Department of Energy through the Los Alamos National Laboratory. Los Alamos National Laboratory is operated by Triad National Security, LLC, for the National Nuclear Security Administration of U.S. Department of Energy (Contract No. 89233218CNA000001)

–

Presenters

  • Paul A Bradley

    • Los Alamos Natl Lab

Authors

  • Paul A Bradley

    • Los Alamos Natl Lab

  • Nomita Vazirani

    • Los Alamos National Laboratory

  • Nova H Moore

    • Los Alamos National Laboratory
    • Central Michigan Univ

  • Heather M Johns

    • Los Alamos Natl Lab
    • Los Alamos National Laboratory (LANL)

  • Robert F Heeter

    • Lawrence Livermore National Laboratory

  • Yekaterina P Opachich

    • Lawrence Livermore National Lab
    • Lawrence Livermore National Laboratory

  • Christopher J Fontes

    • Los Alamos National Laboratory
    • Los Alamos National Laboratory (LANL)

  • Joseph M Kasper

    • Los Alamos National Laboratory

  • Ethan L Smith

    • Los Alamos National Laboratory

  • Ahmed T Elshafiey

    • LANL
    • Los Alamos National Laboratory

  • Matthias Hohenberger

    • Lawrence Livermore Natl Lab

  • Theodore S Perry

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab

  • Daniel C Mayes

    • University of Texas at Austin

  • Bryce Hobbs

    • University of Texas at Austin

  • Michael Houston Montgomery

    • University of Texas at Austin

  • Don E Winget

    • The University of Texas at Austin
    • University of Texas at Austin

  • Todd J Urbatsch

    • Los Alamos National Laboratory
    • Los Alamos National Laboratory (LANL)