Constraining Temperature Profiles in High Energy Density Matter Through High-resolution X-ray Spectroscopy

ORAL

Abstract

High energy density (HED) matter exists in extremes of temperature and density characterized by energy densities exceeding 1011 J/m3 . Short-pulse, laser-solid interactions provide a unique platform to develop well-characterized laboratory HED conditions to diagnose fundamental properties such as opacity and equations of state, needed to benchmark atomic physics models and simulations tools. Experiments performing high-resolution (E/ΔE > 7500) X-ray spectroscopy of copper K-shell emission using the high-contrast, high-intensity (I ∼1021 W/cm2 ) ALEPH 400 nm laser at Colorado State University demonstrate the generation of micron-scale, uniformly-heated, solid-density plasmas with electron densities exceeding 1024 cm-3 and temperatures exceeding 3 keV. Simultaneous measurement of front-side and rear-side K-shell fluorescence reveals opacity effects within the highly-ionized plasma conditions that indicate significant plasma bulk heating driven by refluxing electrons. We implement a Monte Carlo algorithm to further constrain the plasma heating profiles by estimating the probability distribution of temperature profiles derived from collisional-radiative modeling

*LaserNetUS under Contract No. DE-SC-0019076 and DE-SC0021246: the LaserNetUS initiative at Colorado State University

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Publication: N. F. Beier, et al., Homogeneous, Micron-scale High Energy Density Matter Generated by Relativistic Laser-solid
Interactions (Submitted Phys. Rev. Lett.)

Presenters

  • Nicholas F Beier

    • University of Alberta

Authors

  • Nicholas F Beier

    • University of Alberta

  • Bassam Nima

    • University of Alberta

  • Vigneshvar Senthilkumaran

    • University of Alberta

  • Hunter G Allison

    • University of California, Irvine

  • Yasmeen Musthafa

    • University of California, Irvine
    • TAE Technologies, Inc.

  • Mahek Logantha

    • University of California, Irvine

  • Philip C Efthimion

    • Princeton Plasma Physics Laboratory
    • PPPL

  • Lan Gao

    • PPPL
    • Princeton Plasma Physics Laboratory

  • Kenneth W Hill

    • PPPL
    • Princeton Plasma Physics Laboratory

  • Kirk A Flippo

    • Los Alamos Natl Lab
    • Los Alamos National Laboratory

  • Stephanie B Hansen

    • Sandia National Laboratories

  • Reed C Hollinger

    • Colorado State University

  • Ryan Nedbailo

    • Colorado State University
    • Colorado state university

  • Huanyu Song

    • Colorado State University

  • Shoujun Wang

    • Colorado State University

  • Vyacheslav Shlyaptsev

    • Colorado State University

  • Ronnie L Shepherd

    • Lawrence Livermore Natl Lab

  • Franklin J Dollar

    • University of California, Irvine

  • Jorge J Rocca

    • Colorado State University

  • Amina E Hussein

    • Univ of Alberta
    • University of Alberta, Canada