Determination of Size and Shape of Imploding Polar-Driven Targets on OMEGA from X-Ray Images

ORAL

Abstract

This talk will describe the method for determining the size and shape of the imploding polar-driven targets on OMEGA from framed x-ray images of the plasma self-emission or of backlighter emission absorbed by the plasma. Accurate low-mode fits to the images are accomplished in the presence of both neutron-induced noise and inherent framing-camera noise. The same fitting procedure is used on \textit{DRACO} 2-D hydrodynamic simulations allowing for comparisons that take into account the spatial and temporal resolution of the experimentally determined measurements. Radiographs obtained on OMEGA with high-speed framing cameras have obtained the evolution of the low Legendre modes with 30-ps frame-to-frame intervals and with accuracies of $\sim $1{\%} of the radius. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0001944.

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Authors

  • F.J. Marshall

    • Laboratory for Laser Energetics, U. of Rochester

  • R. Epstein

    • Laboratory for Laser Energetics, U. of Rochester

  • P.W. McKenty

    • Laboratory for Laser Energetics, U. of Rochester

  • J.A. Marozas

    • Laboratory for Laser Energetics, U. of Rochester

  • P.B. Radha

    • Laboratory for Laser Energetics, U. of Rochester

  • S. To

    • Laboratory for Laser Energetics, U. of Rochester