Self-Radiography of Imploded Shells on OMEGA Based on Additive-Free Multi-Monochromatic Continuum Spectral Analysis

ORAL

Abstract

Radiographs of pure-DT cryogenic imploding shells will help to validate progress toward ignition-scalable performance of inertial confinement fusion implosions. These can be radiographed with the core spectral emission near \textit{hv}~$\approx $ 2 keV, based on hydrogen continuum emissivity and opacity, without spectral additives, as used in previous applications of implosion self-radiography. A demonstration of this concept of additive-free self-radiography based on continuum spectroscopy has been attempted at higher spectral energy (\textit{hv}~$\approx $~3 to 5 keV) with warm CH shell implosions on OMEGA. Self-backlighting is performed near peak compression, unlike externally backlit radiography, where self-emission is a background signal that overwhelms the backlighter near peak compression. This technique is also surprisingly immune to some anticipated sources of systematic error.

*This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856

–

Authors

  • R. Epstein

    • University of Rochester

  • C. Stoeckl

    • University of Rochester
    • University of Rochester - LLE
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics
    • Laboratory for Laser Energetics, U. of Rochester
    • University of Rochester, NY 14623, USA

  • Radha Bahukutumbi

    • LLE
    • University of Rochester
    • University of Rochester - LLE
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for laser Energetics, University of Rochester
    • Laboratory for Laser Energetics, U. of Rochester
    • Laboratory for Laser Energetics

  • Tim Collins

    • LLE
    • University of Rochester
    • University of Rochester - LLE
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics

  • D. Cao

    • University of Rochester
    • University of Rochester - LLE
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics, U. of Rochester
    • Laboratory for Laser Energetics

  • R. C. Shah

    • University of Rochester
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics
    • Laboratory for Laser Energetics, U. of Rochester
    • University of Rochester Laboratory for Laser Energetics
    • LLE

  • Dylan Cliche

    • University of Nevada, Reno

  • Roberto Mancini

    • University of Nevada, Reno