Evaluating the Residual Kinetic Energy in Direct-Drive Cryogenic Implosions on OMEGA

ORAL

Abstract

Efficient conversion of the shell kinetic energy to the hot-spot thermal energy is an essential requirement in inertial confinement fusion implosions. The hydrodynamic profile of the fusing deuterium--tritium (DT) plasma will result in a measureable difference in the DT and DD average temperatures. Additionally, a deviation from the DT and DD plasma temperature inferred from the second moment has been suggested as one method used to infer the residual kinetic energy (RKE) in the fusion plasma. An advanced forward-fit technique is used to interpret the spectral moments of the neutron energy distribution emitted from a fusing plasma along two lines of sight. Presented here are measurements of the DT and DD temperature from DT cryogenic drive-drive implosions. The contribution of RKE in these implosions is extracted with the consideration of the role of temperature gradient present in a 1-D model. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856.

–

Authors

  • C. J. Forrest

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

  • V. Yu. Glebov

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

  • V. N. Goncharov

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

  • James Knauer

    • Laboratory for Laser Energetics, U. of Rochester
    • 4Laboratory for Laser Energetics
    • Laboratory for Laser Energetics
    • LLE-UR
    • University of Rochester
    • Lab for Laser Energetics

  • Owen Mannion

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

  • Zaarah Mohamed

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

  • P. B. Radha

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

  • Sean Regan

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

  • Rahul Shah

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

  • C. Stoeckl

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