Actions for Free-Surface Optical Scattering as an Indicator of the Shock-Induced Solid-Liquid Phase Transition in Tin [electronic resource].

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Free-Surface Optical Scattering as an Indicator of the Shock-Induced Solid-Liquid Phase Transition in Tin [electronic resource].

Published
Washington, D.C. : United States. National Nuclear Security Administration, 2008.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
United States. National Nuclear Security Administration and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
When highly polished metal surfaces melt upon release after shock loading, they exhibit features that suggest significant surface changes accompany the phase transition. The reflection of light from such surfaces changes from specular (pre-shock) to diffuse upon melting. A familiar manifestation of this phenomenon is the loss of signal light in VISAR measurements, which occurs at pressures high enough to melt the free surface. Unlike many other potential material phase-sensitive diagnostics (e.g., reflectometry, conductivity) that show relatively small (1%–10%) changes, the specularity of reflection provides a more sensitive and definitive indication of the solid-liquid phase transition. Data will be presented that support the hypothesis that specularity changes indicate melt in a way that can be measured easily and unambiguously.
Report Numbers
E 1.99:doe/nv/25946--362
doe/nv/25946--362
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Note
Published through SciTech Connect.
07/01/2008.
"doe/nv/25946--362"
Journal of Applied Physics 104 1 ISSN 0021-8979; JAPIAU FT
Lutz, S. S.; Turley, W. D.; Wilke, M. D.; Furlanetto, M. R.; Veeser, L. R.; Rigg, P. A.; Holtkamp, D. B.; Stevens, G. D.; Jensen, B. J.; Marshall, B. R.; Hixson, R. S.
National Security Technologies, LLC
Funding Information
DE-AC52-06NA25946
View MARC record | catkey: 13821401