Accession Number:

ADA639466

Title:

Ejecta Particle Size Distributions for Shock Loaded Sn And Al Targets

Descriptive Note:

Conference paper

Corporate Author:

LOS ALAMOS NATIONAL LAB NM

Report Date:

1999-06-01

Pagination or Media Count:

5.0

Abstract:

When a shock wave interacts at the surface of a metal sample ejected matter ejecta can be emitted from the surface. The mass, size, shape, and velocity of the ejecta varies depending on the initial shock conditions and the material properties of the target. To understand this phenomena, experiments have been conducted at the Pegasus Pulsed Power Facility PPPF located at Los Alamos National Laboratory LANL. The facility is used to implode cylinders to velocities of many mmmu sec. The driving cylinder impacts a smaller target cylinder where shock waves of many hundreds of kilobars can be reached and ejecta formation proceeds. The ejecta particle sizes are measured using an in-line Fraunhofer holography technique. Over the years much work has gone into characterizing ejecta mass, but very little has been done to understand the particle size distributions. In this report, ejecta particle size distributions will be presented for shocked Al and Sn targets at pressures of 300 kb and 400 kb respectively. For the first time, particle distributions that results from microjet production will be presented. Results from these experiments will be presented along with predictions from percolation theory

Subject Categories:

  • Meteorology
  • Properties of Metals and Alloys
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE