Toward Brighter Continuum X-Ray Source

ORAL

Abstract

A brighter x-ray source covering a high-energy range is needed as a backlighter to investigate high-energy-density (HED) materials. Plastic capsules under laser compression are known to produce bright and smooth sources through bremsstrahlung emission in the lower-energy regime. We demonstrate a new target design that achieves a brighter and uniform x-ray source extending into higher energy ranges by optimizing recombination emission, which dominates for mid-Z metals around ten keV. The absolute source emission is analyzed photometrically using data from the Extended X-ray Absorption Fine Structure (EXAFS) Flat Crystal X-ray (EFX) Spectrometer. A ray-tracing method is employed to account for oblique incidence effects on filters and image plates, with error analysis included to ensure accurate spectral characterization. We present comparisons of brightness and efficiency with previous experiments and discuss the two main processes of continuum emission and their optimum conditions.

*This material is based upon work supported by the Department of Energy [National Nuclear Security Administration] University of Rochester "National Inertial Confinement Fusion Program" under Award Number(s) DE-NA0004144.

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Presenters

  • Hakhyeon Kim

    • University of Rochester

Authors

  • Hakhyeon Kim

    • University of Rochester

  • Ethan A Smith

    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics (LLE)
    • Department of Physics and Astronomy, University of Rochester, Rochester, NY, United States

  • Matthew Edward Signor

    • University of Rochester
    • Department of Physics and Astronomy, University of Rochester, Rochester, NY, United States

  • David Bishel

    • Livermore National Laboratory
    • Lawrance Livermore National Laboratory, Livermore, CA, United States

  • David Alexander Chin

    • University of Rochester
    • Laboratory for Laser Energetics
    • Laboratory for Laser Energetics, University of Rochester, Rochester, NY, United States

  • Neel V Kabadi

    • Laboratory for Laser Energetics
    • Laboratory for Laser Energetics (LLE)
    • Laboratory for Laser Energetics, University of Rochester, Rochester, NY, United States

  • Ryan R Rygg

    • Laboratory for Laser Energetics
    • University of Rochester
    • Department of Physics and Astronomy, University of Rochester, Rochester, NY, United States

  • Gilbert W Collins

    • University of Rochester
    • Laboratory for Laser Energetics, University of Rochester
    • Department of Physics and Astronomy, University of Rochester, Rochester, NY, United States