Diffusion-dominated mixing in moderate convergence implosions

A. B. Zylstra, N. M. Hoffman, H. W. Herrmann, M. J. Schmitt, Y. H. Kim, K. Meaney, A. Leatherland, S. Gales, C. Forrest, V. Yu. Glebov, M. Schoff, M. Hoppe (+1 others)
2018 Physical review. E  
High-Z material mix into the fuel degrades inertial fusion implosions and can prevent ignition. Mix is often assumed to be dominated by hydrodynamic instabilities, but we report new OMEGA data, using shells with ∼150nm deuterated layers to gain unprecedented resolution, which give strong evidence that the dominant mix mechanism is diffusion for these moderate temperature ( < ∼ 6 keV) and convergence (∼12) implosions. Small-scale instability-driven or turbulent mix is negligible.
doi:10.1103/physreve.97.061201 pmid:30011491 fatcat:jqygtiz47ncuperselrmuw7rhe