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Proceedings Paper

High-speed optical and x-ray methods for evaluating laser-generated shock waves in materials and the corresponding dynamic material response
Author(s): Dennis L. Paisley; D. C. Swift; A. C. Forsman; George A. Kyrala; R. P. Johnson; Justin S. Wark; A. M. Allen; A. Loveridge; Roger A. Kopp
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Paper Abstract

Optical diagnostic techniques including interferometry, electronic streak photography, and transient x-ray diffraction are used to study the dynamic material response to shock loading by direct laser irradiation and impact by laser- launched plates. The Los Alamos Trident laser is one of several lasers that have been used to generate shocks of 10 Kbar to several Mbar in single crystal and polycrystalline materials. Incorporating optical velocity interferometry (line-VISAR and point-VISAR) with transient x-ray diffraction can provide a complete understanding of the dynamic material response to shock compression and release. Laser-launched flyer plates provide an ideal method to generate one- dimensional shocks in materials. The quality of the one- dimensionality of the launch and acceleration of plates is evaluated by line-imaging VISAR. The line-imaging VISAR images the fringes along a line across the diameter of the plate. Each fringe maxima and minima provide acceleration and velocity information at the specific point on the plate. By varying the fringe constant, number of fringes and fringe spacing on the plate, detailed experimental data can be obtained. For our experiments, most plates are 3-mm diameter and accelerated to 0.2 - > 6 km/sec.

Paper Details

Date Published: 17 April 2001
PDF: 10 pages
Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); doi: 10.1117/12.424325
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)
R. P. Johnson, Los Alamos National Lab. (United States)
Justin S. Wark, Oxford Univ. (United Kingdom)
A. M. Allen, Oxford Univ. (United Kingdom)
A. Loveridge, Oxford Univ. (United Kingdom)
Roger A. Kopp, Los Alamos National Lab. (United States)


Published in SPIE Proceedings Vol. 4183:
24th International Congress on High-Speed Photography and Photonics
Kazuyoshi Takayama; Tsutomo Saito; Harald Kleine; Eugene V. Timofeev, Editor(s)

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