Target Test at Atlas Pulsed Power System

The Atlas capacitor driven pulsed power system is the world\´s first specifically designed to implode solid and near-solid density metal liners for use in pulsed power hydrodynamic experiments. One application of this technique is to test materials with designed damaged surfaces to validate material models with detailed spall and failure data. A rigorous development program using theory, computation (finite element analysis), and static hydrotesting of prototypical components is utilized to identify and solve manufacturing issues, address safety concerns, and, to the extent possible, ensure a successful experiment. The targets recently developed are pressurized with an inert gas and the target wall contains a "zero-strength" band of micron- sized tungsten powder that is to be projected toward the cylinder center upon liner impact. Finite element analysis was used to predict deformation of the target walls due to the internal pressure and evaluate a sealing joint for vacuum integrity. Prototype components were used to aid in diagnostic development of axial and radial x-rays and to verify the finite element analysis. It is hoped that this type of effort will result in reverse engineering the target walls to provide planer impact with the liner. The ultimate goal of this program is to eventually eliminate laboratory testing of prototypical components to save time and effort in target design.