Understanding temperature distribution in ICF hot-spots with X-ray diagnostics of disparate spectral ranges

ORAL

Abstract

H. G. Rinderknecht, R. Epstein, D. Thorn, T. E. Weber\newline X-ray diagnostics for the electron temperature $T_e$ in ICF implosions are currently being developed. We demonstrate for the first time that the X-ray diagnostics also allow constraining the Te spatial profile in a realistic hot-spot. A series of Omega implosions have been performed with both soft (3-6 keV) and hard (20-30 keV) X-ray diagnostics employed simultaneously. The apparent temperatures inferred from the respective data have been found to differ by a factor of about 2. This reflects the fact that the higher energy photons are produced closer to the center of the hot-spot, thus enabling us to quantify the difference between peak and peripheral temperatures in the fusion fuel.

*This work was partially supported by the Laboratory Directed Research and Development program under the auspices of the U.S. Dept. of Energy by the Triad National Security, LLC, Los Alamos National Laboratory under Contract No. 89233218CNA000001

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Authors

  • Grigory Kagan

    • Imperial College London

  • H. Sio

    • LLNL

  • T. R. Joshi

    • LLE

  • M. J. Macdonald

    • LLNL

  • N.V. Kabadi

    • MIT

  • P. Adrian

    • MIT

  • M. Gatu Johnson

    • MIT

  • R. C. Shah

    • LLE

  • D. Cao

    • LLE

  • P. Hakel

    • LANL

  • C. J. McDevitt

    • University of Florida, Gainesville

  • H. W. Herrmann

    • LANL

  • M. J. Schmitt

    • LANL

  • A. J. Crilly

    • Imperial College London

  • B. D. Appelbe

    • Imperial College London

  • J. P. Chittenden

    • Imperial College London

  • O. L. Landen

    • LLNL

  • S. P. Regan

    • LLE

  • E. M. Campbell

    • LLE

  • D. Svyatskiy

    • LANL

  • R. A. Simpson

    • MIT

  • J. A. Frenje

    • MIT

  • R. D. Petrasso

    • MIT

  • R. C. Mancini

    • University of Nevada, Reno

  • M. J. Rosenberg

    • LLE