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Proceedings Paper

Dynamic materials evaluation by confined plasma ablation and laser-generated shocks
Author(s): Dennis L. Paisley; D. C. Swift; A. C. Forsman; George A. Kyrala; Randall P. Johnson; Roger A. Kopp; Allan A. Hauer; Justin S. Wark; A. Loveridge; A. M. Allen; Daniel H. Kalantar
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Paper Abstract

Laser-generated shocks can and have been used to study their effects on single crystal materials during shock compression. While a crystal undergoes shock compression and release, the transient x- ray diffraction (TXD) of the Bragg and Laue signals is indicative of the change in the crystal lattice spacing. The lattice spacing directly relates to the strain in the crystal. From the dynamic lattice data, strain, strain rate, and/or phase change in a material may be determined. Confined ablation plasmas can efficiently launch a flyer plate for direct impact on a target material imparting a well-characterized shock input and generate kilobar to megabar pressure pulses over a wide range of pulse duration (<EQ 1 - >= 20 ns). The laser-launched flyer plates are analogous to those launched by gas guns, but the smaller size provides an experimental method not easily accessible by larger gas gun experiments. With lasers, diagnostic equipment can be easily synchronized to study dynamic material parameters, i.e., single crystal shock dynamics, interfacial bond strengths of thin coatings, grain-interfaces, texture, and high strain rates (106 - 109 sec-1).

Paper Details

Date Published: 16 August 2000
PDF: 8 pages
Proc. SPIE 4065, High-Power Laser Ablation III, (16 August 2000); doi: 10.1117/12.407370
Show Author Affiliations
Dennis L. Paisley, Los Alamos National Lab. (United States)
D. C. Swift, Los Alamos National Lab. (United States)
A. C. Forsman, Los Alamos National Lab. (United States)
George A. Kyrala, Los Alamos National Lab. (United States)
Randall P. Johnson, Los Alamos National Lab. (United States)
Roger A. Kopp, Los Alamos National Lab. (United States)
Allan A. Hauer, Los Alamos National Lab. (United States)
Justin S. Wark, Univ. of Oxford (United Kingdom)
A. Loveridge, Univ. of Oxford (United Kingdom)
A. M. Allen, Univ. of Oxford (United Kingdom)
Daniel H. Kalantar, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 4065:
High-Power Laser Ablation III
Claude R. Phipps, Editor(s)

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