High-Resolution X-ray Spectroscopy of a Polar Direct Drive Exploding Pusher on NIF

POSTER

Abstract

An absolutely-calibrated, high-resolution x-ray Bragg crystal spectrometer has been deployed at the National Ignition Facility (NIF) to diagnose plasma conditions in a polar direct drive exploding pusher (PDXP) implosion near stagnation. Two conical crystals focus the Kr He-α and He-β complexes onto a streak camera for time-resolved spectroscopy, and spectral intensities are calibrated via a cylindrical von Hamos crystal that time-integrates the intervening energy range between 12.8 and 15.6 keV. The evolution of electron density and temperature are inferred though Stark broadening and the relative intensities of dielectronic satellites. Results from collisional-radiative codes SCRAM and CRETIN are compared to relative and absolute line intensities and widths, which enables benchmarking of predicted plasma parameter profiles from 1D radiation hydrodynamic simulations of the PDXP platform.

*This work was performed under the auspices of the U.S. Department of Energy by Princeton Plasma Physics Laboratory under contract DE-AC02-09CH11466 and by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344.

Presenters

  • Brian Francis Kraus

    • Princeton University, Princeton Plasma Phys Lab

Authors

  • Brian Francis Kraus

    • Princeton University, Princeton Plasma Phys Lab

  • Lan Gao

    • Princeton Univ
    • Princeton Plasma Phys Lab
    • Princeton University
    • Princeton Plasma Physics Laboratory

  • K. Wayne Hill

    • Princeton Univ
    • Princeton Plasma Physics Lab
    • Princeton Plasma Phys Lab
    • Princeton Plasma Physics Laboratory

  • Manfred Ludwig Bitter

    • Princeton Plasma Phys Lab
    • Princeton Plasma Physics Laboratory

  • Philip Charles Efthimion

    • Princeton Plasma Physics Lab
    • Princeton Plasma Phys Lab
    • Princeton Plasma Physics Laboratory

  • Marilyn Beth Schneider

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Lab
    • Lawrence Livermore National Laboratory

  • Hui Chen

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Marion J Ayers

    • Lawrence Livermore Natl Lab

  • D. A Liedahl

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Andrew G. MacPhee

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Heather D Whitley

    • Lawrence Livermore Natl Lab

  • Charles Leland Ellison

    • Lawrence Livermore Natl Lab
    • LLNL

  • Hai P. Le

    • Lawrence Livermore Natl Lab

  • Ronald Bettencourt

    • Lawrence Livermore Natl Lab

  • Robert L Kauffman

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • David Nelson

    • Univ Rochester Lab for Laser Energetics