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Energy Flow in Thin Shell Implosions and Explosions

J. J. Ruby1,2, J. R. Rygg1,2,3, D. A. Chin1,2, J. A. Gaffney4, P. J. Adrian5, C. J. Forrest2, V. Yu. Glebov2, N. V. Kabadi5, P. M. Nilson2 et al.

Y. Ping4, C. Stoeckl2, and G. W. Collins1,2,3

  • 1Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
  • 2Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14627, USA
  • 3Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA
  • 4Lawrence Livermore National Laboratory, Livermore, California 94550, USA
  • 5Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

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Phys. Rev. Lett. 125, 215001 – Published 18 November, 2020

DOI: https://doi.org/10.1103/PhysRevLett.125.215001

Abstract

Energy flow and balance in convergent systems beyond petapascal energy densities controls the fate of late-stage stars and the potential for controlling thermonuclear inertial fusion ignition. Time-resolved x-ray self-emission imaging combined with a Bayesian inference analysis is used to describe the energy flow and the potential information stored in the rebounding spherical shock at 0.22 PPa (2.2 Gbar or billions of atmospheres pressure). This analysis, together with a simple mechanical model, describes the trajectory of the shell and the time history of the pressure at the fuel-shell interface, ablation pressure, and energy partitioning including kinetic energy of the shell and internal energy of the fuel. The techniques used here provide a fully self-consistent uncertainty analysis of integrated implosion data, a thermodynamic-path independent measurement of pressure in the petapascal range, and can be used to deduce the energy flow in a wide variety of implosion systems to petapascal energy densities.

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Physics Subject Headings (PhySH)

See Also

Constraining physical models at gigabar pressures

J. J. Ruby, J. R. Rygg, D. A. Chin, J. A. Gaffney, P. J. Adrian, D. Bishel, C. J. Forrest, V. Yu. Glebov, N. V. Kabadi, P. M. Nilson, Y. Ping, C. Stoeckl, and G. W. Collins
Phys. Rev. E 102, 053210 (2020)

Article Text

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Phys. Rev. Lett. 125, 215001– Published 18 November, 2020
  • Received 26 August 2020
  • Accepted 30 October 2020
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