Measurements of non-resonant inelastic X-ray scattering from warm dense Argon plasmas at the LCLS

ORAL

Abstract

Measuring bound-free transitions from X-ray Thomson scattering, or non-resonant inelastic X-ray scattering from core or semi-core electrons, is a powerful technique to probe matter in extreme conditions. Here we present measurements of high signal-to-noise, spectrally resolved inelastic X-ray scattering from shock compressed Argon at the MEC end-station of the LCLS. Combining a coherent X-ray laser coupled with a novel Argon micro-jet that is shock-heated using a 1 Hz temporally stretched Ti:Saphire laser has enabled dynamic measurements of ionization, densities, and temperatures from ps-laser driven samples approaching the warm dense state. Our results show time resolved measurements of heated Argon using spectrally resolved X-ray scattering with unprecedented dynamic range. Measurements were performed using a energy-dispersive spectrometer equipped with a Highly Annealed Pyrolytic Graphite (HAPG) crystal in combination with a Cornell-SLAC Pixel Array Detector (CSPAD) that was configured in the von Hamos geometry.

** This work is supported by the DOE Office of Science, Fusion Energy Science under FWP 100182 and FWP 100237.

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Presenters

  • Luke Fletcher

    • SLAC National Accelerator Laboratory
    • SLAC - Natl Accelerator Lab

Authors

  • Luke Fletcher

    • SLAC National Accelerator Laboratory
    • SLAC - Natl Accelerator Lab

  • Emma Elizabeth McBride

    • SLAC National Accelerator Laboratory
    • SLAC - Natl Accelerator Lab

  • Bastian Witte

    • Univ of Rostock

  • Thomas G White

    • U. of Nevada, Reno
    • U. of Nevada, Reno, University of Oxford

  • Chandra Curry

    • SLAC - Natl Accelerator Lab
    • SLAC - Natl Accelerator Lab, University of Alberta

  • Adrien Descamps

    • SLAC - Natl Accelerator Lab, SLAC - Natl Accelerator Lab
    • SLAC - Natl Accelerator Lab

  • Maxence Gauthier

    • SLAC - Natl Accelerator Lab

  • Sebastian Goede

    • European XFEL GmbH

  • Jongjin B Kim

    • SLAC - Natl Accelerator Lab

  • Bob Nagler

    • SLAC National Accelerator Laboratory
    • SLAC - Natl Accelerator Lab

  • Benjamin K Ofori-Okai

    • SLAC National Accelerator Laboratory
    • SLAC - Natl Accelerator Lab

  • Alexandra Rigby

    • Oxford University, UK
    • University of Oxford

  • Peihao Sun

    • SLAC National Accelerator Laboratory
    • Stanford University

  • Ulf Zastrau

    • European XFEL GmbH

  • Gianluca Gregori

    • University of Oxford

  • Siegfried H Glenzer

    • SLAC National Accelerator Laboratory
    • Lawrence Livermore Natl Lab
    • SLAC - Natl Accelerator Lab
    • SLAC