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Proceedings Paper

One-dimensional plate-launch techniques and associated diagnostics
Author(s): Dennis L. Paisley; David B. Stahl
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Paper Abstract

A high-power, high-energy laser is used to accelerate miniature metal plates (3 mm diameter X 50 micron thick, typ.) to high velocities of perform 1D impacts. Several plate conditions are critical to their performance. The plates must be flat and intact, and traveling at a known velocity and acceleration profile. Because the plates are small only optical diagnostic techniques can be used without perturbing the plate are small only optical diagnostic techniques can be used without perturbing the plate performance. We use pulsed laser stereo-photography to determine plate integrity and flatness, and velocity interferometry (VISAR) to evaluate plate acceleration and terminal velocity. Laser-launched plates can accelerate to over 109 m2/s2 and reach terminal velocities over 5 km/s. The high accelerations require temporal resolution of < 0.200-ns. The temporal resolution is accomplished by transferring the VISAR optical signals by optical fiber to an electronic streak camera for recording. Near 1D plate impacts are accomplished by converting the spatial Gaussian laser beam to a Tophat spatial profile. The pulsed laser stereo-photography system consists of a 10X stereo camera and a 5-ns pulsed doubled Nd:YAG laser for the light source. By incorporating these different optical techniques a complete understanding of the dynamic performance of miniature plates in flight is accomplished.

Paper Details

Date Published: 28 May 1997
PDF: 5 pages
Proc. SPIE 2869, 22nd International Congress on High-Speed Photography and Photonics, (28 May 1997); doi: 10.1117/12.273353
Show Author Affiliations
Dennis L. Paisley, Los Alamos National Lab. (United States)
David B. Stahl, Los Alamos National Lab. (United States)


Published in SPIE Proceedings Vol. 2869:
22nd International Congress on High-Speed Photography and Photonics
Dennis L. Paisley; ALan M. Frank, Editor(s)

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