Simulated, Theoretical and Experimental Shock Trajectories in Cylindrical Geometry

Abstract

The current work compares computations and similarity relations for convergent shocks with experimental data from cylindrical implosions on the Shiva Star capacitor bank at AFRL (Air Force Research Laboratory). The experiment consisted of a 1 mm thick cylindrical aluminum liner that is magnetically imploded onto a central target. The central target contains an inner Lucite cylinder surrounded by an outer Sn layer. The target was designed using the Eulerian hydrodynamics code RAGE in 2‐ and 3D. One‐dimensional models of the liner driver utilizing the RAVEN MHD code set the initial liner/target interaction parameters for the RAGE simulations. Shock breakout from the Sn/Lucite interface and subsequent propagation within the Lucite are measured to provide experimental data for code validation. Radial convergence is examined through comparisons with similarity solutions. Comparison of experimentally measured timing data and simulated shock trajectories will be discussed. Further efforts compare equation‐of‐state effects by utilizing an analytic Grueneisen EOS instead of the original SESAME tables.