Electron Temperature Measurement of Buried Layer Targets Using Time Resolved K-shell Spectroscopy

ORAL

Abstract

Short pulse laser-heated buried layer experiments have been performed with the goal of creating plasmas with mass densities $\geq$ 1 g/cm$^{3}$ and electron temperatures $\geq$ 500 eV. The buried layer geometry has the advantage of rapid energy deposition before significant hydrodynamic expansion occurs. For brief periods ($<$ 40 ps) this provides a low gradient, high density platform for studying emission characteristics under extreme plasma conditions. A study of plasma conditions achievable using the Orion laser facility has been performed. Time resolved K-shell spectroscopy was used to determine the temperature evolution of buried layer aluminum foil targets. The measured evolution is compared to a 2-D PIC simulation done using LSP, which shows late time heating from the non-thermal electron population.

*This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.

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Authors

  • E. V. Marley

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

  • M. E. Foord

    • Lawrence Livermore National Laboratory

  • R. Shepherd

    • Lawrence Livermore National Laboratory

  • P. Beiersdorfer

    • Lawrence Livermore National Laboratory

  • G. Brown

    • Lawrence Livermore National Laboratory

  • H. Chen

    • Lawrence Livermore National Laboratory

  • J. Emig

    • Lawrence Livermore National Laboratory

  • M. Schneider

    • Lawrence Livermore National Laboratory

  • K. Widmann

    • Lawrence Livermore National Laboratory

  • H. Scott

    • Lawrence Livermore National Laboratory

  • R. London

    • Lawrence Livermore National Laboratory

  • M. Martin

    • Lawrence Livermore National Laboratory

  • B. Wilson

    • Lawrence Livermore National Laboratory

  • C. Iglesias

    • Lawrence Livermore National Laboratory

  • C. Mauche

    • Lawrence Livermore National Laboratory

  • H. Whitley

    • Lawrence Livermore National Laboratory

  • J. Nilsen

    • Lawrence Livermore National Laboratory

  • D. Hoarty

    • Atomic Weapons Establishment

  • S. James

    • Atomic Weapons Establishment

  • C.R.D. Brown

    • Atomic Weapons Establishment

  • M. Hill

    • Atomic Weapons Establishment

  • P. Allan

    • Atomic Weapons Establishment

  • L. Hobbs

    • Atomic Weapons Establishment