Core spatial structure and areal-density modulation in OMEGA direct-drive implosions cores

POSTER

Abstract

We discuss the observation of spectrally resolved image data from argon-doped, deuterium-filled OMEGA direct-drive implosions. A titanium-doped tracer layer is also embedded in the plastic shell. The image data were recorded simultaneously along three quasi-orthogonal lines of sight (LOS) using three identical, gated Direct-Drive Multi-Monochromatic x-ray Imagers (DDMMI). For each LOS, a set of space-resolved argon emission and titanium absorption line spectra can be extracted from the spectrally resolved core image data recorded with the DDMMI instruments. The argon x-ray emission emitted at the collapse of the implosion provides a spectroscopic signature for the spatial structure of the imploded core, while the titanium line absorption of continuum radiation has information about the areal-density modulations in the compressed shell. We discuss the connection between the areal-density modulations observed along the three LOS and the spatial-structure of the core.

*Work supported by DOE/NLUF Grant DE-FG52-09NA29042, and LLNL.

Authors

  • T. Nagayama

    • University of Nevada, Reno, Physics Department, Reno, NV 89557, USA

  • H.M. Johns

    • University of Nevada, Reno, Physics Department, Reno, NV 89557, USA

  • R. Mancini

    • University of Nevada
    • University of Nevada, Reno
    • University of Nevada, Reno, Physics Department, Reno, NV 89557, USA

  • R. Florido

    • University of Nevada, Reno, Physics Department, Reno, NV 89557, USA

  • R. Tommasini

    • Lawrence Livermore National Laboratory, Livermore, CA 94550, USA

  • J. Koch

    • Lawrence Livermore National Laboratory, Livermore, CA 94550, USA

  • J. Delettrez

    • Laboratory for Laser Energetics, University of Rochester, NY 14623, USA

  • S. Regan

    • Laboratory for Laser Energetics, University of Rochester, NY 14623, USA

  • V. Smalyuk

    • Laboratory for Laser Energetics, University of Rochester, NY 14623, USA