Pushered single shell capsule design for the study of high Z mix on the National Ignition Facility

Alternative ignition scenarios on the NIF such as double shells [1,2] require an understanding of the mix between high-Z capsule shell and DT gas. By utilizing the two-shock platform, which has been shown to be a robust, symmetric, and near 1-D implosion [3], a new design is developed to explore high Z mix. Through the addition of a Ge doped pusher layer on the inner surface of the capsule, mixing of non-fully ionized material can be measured using x-ray emission, nuclear yield diagnostics developed during the CD mix experiments [4], and characterization of the central core. Using the two-shock design allows for the results to be separated from possible implosion asymmetries, allowing differences in performance between capsules with and without Ge to be attributed to high Z material mixing. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344, Lawrence Livermore National Security, LLC. IM number LLNL-ABS-697758. [1] P.A. Amendt, J.D. Colvin \textit{et al.,} Phys. Plasmas \textbf{9}, 2221 (2002) [2] H.F. Robey, P.A. Amendt \textit{et al.,} Phys. Rev. Lett. \textbf{103}, 145003 (2009) [3] S.F. Khan, S.A. MacLaren \textit{et al.}, Phys. Plasmas \textbf{23}, 042708 (2016) [4] D.T. Casey, V.A. Smalyuk \textit{et al}., Phys. Plasmas \textbf{21}, 092705 (2014)