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Density measurements for the NIF Iron Opacity Campaign

ORAL

Abstract

The Opacity Platform on the National Ignition Facility (NIF) has been developed to measure iron opacities at varying densities and temperatures relevant to the solar interior, and to verify recent experimental results obtained at the Sandia Z-machine, which diverge from theory.  The first set of NIF experiments collected iron opacity data at ~150-160 eV, and an electron density of ~7x1021 cm-3, with a goal to study temperatures up to ~210 eV, with electron densities of up to ~3x1022 cm-3.  The platform has a unique capability that allows an in-situ measurement of the sample expansion.  The sample expansion data is used to infer the sample density thorughout the duration of the laser drive.  We present the details of the density measurement technique, data analysis and recent results.  

 

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Publication: Plan to description in RSI 2022

Presenters

  • Yekaterina Opachich

    Lawrence Livermore Natl Lab

Authors

  • Yekaterina Opachich

    Lawrence Livermore Natl Lab

  • Robert F Heeter

    Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory

  • Heather M Johns

    Los Alamos Natl Lab, LANL

  • Evan S Dodd

    Los Alamos National Laboratory

  • John L Kline

    Los Alamos Natl Lab, Los Alamos National Laboratory

  • Natalia Krasheninnikova

    Los Alamos National Laboratory, Los Alamos Natl Lab

  • Todd Urbatsch

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

  • Theodore S Perry

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