Study of krypton helium-β line shifts versus electron density in NIF compressed capsules

POSTER

Abstract

The possibility of using x-ray line shifts instead of Stark broadening to infer electron density (ne) in high ne plasmas has previously been studied theoretically and experimentally for lower Z elements, Ne, Al, and Cl. In this work the time evolution of shifts of the Kr 1s3p1P1 -> 1s2 1S0 He-β spectrum has been measured in NIF compressed capsules using the dHIRES x-ray spectrometer. Densities of 1.8-4x1024 cm-3 were inferred from Stark broadening. Measured line shifts of 5-14 eV were about 60% of theoretical predictions of Li and Rosmej [EPL, 99, 33001 (2012)]. A theoretical understanding of line shifts and broadening and continuum lowering is important for, e.g., dense plasma equation of state and radiative opacity in stellar interiors, inertial confinement fusion, and planetary interiors.

*Work 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

  • Kenneth W Hill

    • Princeton University

Authors

  • Kenneth W Hill

    • Princeton University

  • M. Bitter

    • PPPL

  • Lan Gao

    • PPPL
    • Princeton Plasma Physics Laboratory

  • Brooklyn Frances Kraus

    • Princeton Plasma Physics Laboratory
    • PPPL

  • Philip C Efthimion

    • Princeton Plasma Physics Laboratory
    • PPPL

  • Novimir A Pablant

    • Princeton Plasma Physics Laboratory
    • PPPL
    • PPPL, Princeton University, P.O. Box 451, Princeton, New Jersey 08543, USA

  • Marilyn B Schneider

    • Lawrence Livermore Natl Lab
    • LLNL

  • Hui Chen

    • Lawrence Livermore National Laboratory
    • LLNL

  • Daniel B Thorn

    • LLNL
    • Lawrence Livermore Natl Lab

  • R L Kauffman

    • LLNL

  • Duane A Liedahl

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

  • Michael J MacDonald

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

  • Andrew G MacPhee

    • LLNL
    • Lawrence Livermore Natl Lab

  • Stanislav Stoupin

    • Lawrence Livermore National Laboratory
    • LLNL

  • R Doron

    • Weizmann Institute of Science

  • E Stambulchik

    • Weizmann Institute of Science

  • Yitzhak Maron

    • Weizmann Institute of Science