The Affects of Ablation, Two-Dimensional Instability, and Current Losses on K-Shell Emission in Wire Array Z-Pinch Implosions.

We present the results of a 2D radiation MHD based theoretical investigation that examines how wire ablation, the level of two-dimensional instability, and current losses in the load region of the pinch affect K-shell radiation for copper and stainless steel wire array implosions on the refurbished Z machine. We find that the broad mass distribution produced by including ablation physics largely overcome the diminishing effects on K-shell yield of two-dimensional instability growth. On the other hand, results of calculations that model suspected current losses near the load region\footnote{C. A. Jennings, Invited talk ICOPS (2009).} show substantial reductions in K-shell yield.