Inference of the electron temperature in ICF implosions from X-ray spectra

ORAL

Abstract

Two main approaches to assessing the electron temperature in ICF implosions are now being considered, which are based on measuring, respectively, line emission from a high-Z dopant such as krypton [1] or spectral continuum of 15 to 30 keV from electrons scattering off the D and T ions [2,3]. However, both types of the X-ray emission are due to suprathermal free electrons, which likely deviate from Maxwellian. We present the first theoretical study of both the line and continuum X-ray spectra from the hot-spot accounting for this deviation. In particular, we show that inferring the electron temperature as if the emitting electrons are Maxwellian gives a lower value than the actual one [4].

References

[1] H. Chen et al. Phys. Plasmas 24 (2017) 072715

[2] L. Jarrott, et al. Rev. Sci. Inst. 87 (2016) 11E534

[3] D. B. Thorn et al. Proc. SPIE 10390 (2017) 1039009

[4] G. Kagan et al. https://arxiv.org/abs/1710.01343

*This work is supported by the Laboratory Directed Research and Development program under the auspices of the U.S. Dept. of Energy by the Los Alamos National Security, LLC, Los Alamos National Laboratory under Contract No. DE-AC52-06NA25396.

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Presenters

  • Grigory A Kagan

    • Los Alamos Natl Lab
    • Los Alamos National Laboratory

Authors

  • Grigory A Kagan

    • Los Alamos Natl Lab
    • Los Alamos National Laboratory

  • Otto L Landen

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • D. Svyatskiy

    • Los Alamos Natl Lab

  • Peter Hakel

    • Los Alamos Natl Lab

  • C.J. Joseph McDevitt

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab

  • Hong Sio

    • Massachusetts Inst of Tech-MIT
    • MIT

  • Neel Kabadi

    • Massachusetts Inst of Tech-MIT
    • MIT

  • R.A. Simpson

    • MIT

  • M. Gatu Johnson

    • MIT

  • Johan Frenje

    • Massachusetts Inst of Tech-MIT
    • MIT

  • Richard David Petrasso

    • Massachusetts Inst of Tech-MIT
    • MIT

  • Rahul C Shah

    • Lab for Laser Energetics
    • Laboratory for Laser Energetics
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics, U. of Rochester
    • Lab for Laser Energetics, Univ of Rochester

  • Michael J Rosenberg

    • University of Rochester
    • Univ of Rochester
    • Univ of Rochester LLE
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics
    • Lab for Laser Energetics

  • Reuben Epstein

    • Univ of Rochester
    • Laboratory for Laser Energetics, University of Rochester
    • Lab for Laser Energetics
    • Laboratory for Laser Energetics, U. of Rochester

  • Sean P Regan

    • Univ of Rochester, Univ of Rochester
    • Univ of Rochester
    • Laboratory for Laser Energetics
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics U. of Rochester
    • Laboratory for Laser Energetics, U. of Rochester
    • Laboratory for Laser Energetics, Rochester, New York
    • University of Rochester
    • Lab for Laser Energetics

  • Tirtha R Joshi

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab

  • Thomas E Weber

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab

  • Hans G. Rinderknecht

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore Natl Lab, Laboratory for Laser Energetics

  • Daniel B. Thorn

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Marilyn Beth Schneider

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Lab
    • Lawrence Livermore National Laboratory

  • David K. Bradley

    • Lawrence Livermore Natl Lab

  • Joe D. Kilkenny

    • General Atomics
    • Lawrence Livermore Natl Lab