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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.

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