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3D morphology of the hot spot and shell of warm ICF implosions at OMEGA

ORAL

Abstract

The 3D morphology of the hot spot and surrounding high-density shell of warm implosions at OMEGA have been measured using knock-on deuteron imaging (KODI). Data is presented from experiments in which several absolutely co-aligned penumbral images of knock-on deuterons were obtained in three nearly orthogonal directions. The KODI technique utilizes the fact that neutrons from DT-fusion reactions in the central hot spot of an ICF implosion elastically scatter deuterons as they transit the surrounding material. The energy of these knock-on deuterons depends on the scattering angle, which means that energy-resolving knock-on deuteron images provides information about different parts of the implosion. The most energetic knock-on deuterons are forward-scattered and probe the shape of the central hot spot, whereas lower-energy knock-on deuterons are made by side-scattering or ranging in the shell and carry information about the dense shell around the hot spot. These measurements provide new insights into the causes and effects of low-mode asymmetries in ICF implosions.

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Publication: J. Kunimune, H. Rinderknecht, P. Adrian, J. Frenje, S. Regan, F. Séguin, M. Gatu Johnson, R. Bahukutumbi, J. Knauer, and B. Bachmann. "Knock-on deuteron imaging for diagnosing the morphology of an ICF implosion at OMEGA". Planning to submit to Rev. Sci. Instrum this year.

Presenters

  • Justin H Kunimune

    Massachusetts Institute of Technology, Massachusetts Institute of Technology MI

Authors

  • Justin H Kunimune

    Massachusetts Institute of Technology, Massachusetts Institute of Technology MI

  • Hans Rinderknecht

    University of Rochester Laboratory for Laser Energetics, Laboratory for Laser Energetics, U. of Rochester, Laboratory for Laser Energetics - Rochester, Lab for Laser Energetics, Laboratory for Laser Energetics, Laboratory for Laser Energetics, University of Rochester, University of Rochester

  • Patrick J Adrian

    Massachusetts Institute of Technology (MIT), Massachusetts Institute of Technology, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology MI

  • Johan A Frenje

    Massachusetts Institute of Technology MIT, MIT PSFC, Massachusetts Institute of Technology (MIT)

  • Sean P Regan

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

  • Fredrick H Seguin

    Massachusetts Institute of Technology MIT

  • Maria Gatu-Johnson

    MIT Plasma Science and Fusion Center, MIT PSFC, MIT, Massachusetts Institute of Technology (MIT), Massachusetts Institute of Technology MI

  • Radha Bahukutumbi

    University of Rochester, Laboratory for Laser Energetics, University of Rochester

  • James P Knauer

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

  • Benjamin Bachmann

    Lawrence Livermore Natl Lab, LLNL

  • Brian Appelbe

    Imperial College London, Imperial College, London

  • Aidan C Crilly

    Imperial College London, CIFS, The Blackett Laboratory, Imperial College London

  • Varchas Gopalaswamy

    Laboratory for Laser Energetics, University of Rochester, Lab for Laser Energetics, Laboratory for Laser Energetics, U. of Rochester, Laboratory for Laser Energetics - Rochester, University of Rochester

  • Owen M Mannion

    University of Rochester, Laboratory for Laser Energetics, University of Rochester

  • Wolfgang R Theobald

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