\textbf{Mass and charge dependence of ion shock coupling and thermal equilibration in ICF shock phase}

ORAL

Abstract

During the shock-convergence phase of ICF implosions there are steep spatial gradients and the ion mean free path becomes long compared to the system size, indicating that multi-ion and kinetic effects may be important. It has been previously indicated that there is substantial thermal decoupling and possibly other kinetic effects in D$^{\mathrm{3}}$He plasmas with conditions relevant to the NIF shock-phase. In this presentation I will show recent work conducted on the Omega laser facility recreating these conditions in DT plasmas. Results indicate a system that is better captured by average-ion hydrodynamic simulations than the D$^{\mathrm{3}}$He case. We are working to understand this behavior. Combined DT and D3He burn averaged observables are consistent with an equilibrating two-temperature model. This has major implications for our understanding of kinetic and multi-ion plasma physics and our modeling of ICF implosions. This work was supported in part by the U.S. DOE, NLUF and LLE.

Authors

  • N. Kabadi

    • PSFC, MIT
    • MIT
    • Massachusetts Institute of Technology
  • H. Sio

    • MIT
  • R. Simpson

    • MIT
  • C. Parker

    • MIT
  • P. J. Adrian

    • MIT
  • A. Bose

    • MIT
  • J. A. Frenje

    • MIT
  • M. Gatu Johnson

    • MIT
  • C. K. Li

    • MIT
  • F. H. Seguin

    • MIT
  • R. D. Petrasson

    • MIT
  • C. Forrest

    • LLE
  • V. Glebov

    • LLE
  • C. Stoeckl

    • LLE
  • D. Edgell

    • LLE
  • S. Atzeni

    • Sapienza, University of Rome
  • W. Taitano

    • LANL
  • A. Simakov

    • LANL
  • L. Chacon

    • LANL
  • O. Larroche

    • CEA