Liner target interaction experiments on Pegasus II

Abstract

program uses capacitively driven low voltage, inductive-storage pulse power to implode cylindrical targets for hydrodynamics experiments. Once a precision driver liner was characterized an experimental series characterizing the aluminum target dynamics was performed. The target was developed for shock-induced quasi-particle ejecta experiments including holography. The concept for the Liner shock experiment is that the driver liner is used to impact the target liner which then accelerates toward a collimator with a slit in it. A shock wave is set up in the target liner and as the shock emerges from the back side of the target liner, ejecta are generated. By taking a laser hologram the particle distribution of the ejecta are hoped to be determined. The goal for the second experimental series was to characterize the target dynamics and not to measure and generate the ejecta. Only the results from the third shot, Pegasus 11-26 fired April 26th, 1994, from the series will be discussed in detail. The second experimental series successfully characterized the target dynamics necessary to move forward towards our planned quasi-ejecta experiments.

Ejecta particle size distributions for shock loaded Sn and Al metals

“…Ejecta experiments similar to these have been performed at other facilities [1,2,3,4,5] however, only a few measurements of particle sizes have been carried out. The experiments were performed at the Pegasus Pulsed Power Facility (PPPF) [6,7] at Los Alamos National Laboratory. Particle size distributions resulting from microjet production will be presented for shock loaded Al (6061 T-6) and Sn metal samples.…”

Megabar liner experiments on Pegasus II

“…Three years ago, a solid aluminum liner which could produce shock pressures in the hundreds of kbar regime was designed' and fielded [2] at the LANL Pegasus I1 facility. This liner design has since been used successfully for a variety of physics experiments.…”