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Asymptotic measurements of free surface instabilities in laser-induced shock waves

  • M. Werdiger (a1), B. Arad (a1), Z. Henis (a1), Y. Horowitz (a1), E. Moshe (a1), S. Maman (a1), A. Ludmirsky (a1) and S. Eliezer (a1)...

Abstract

An experimental technique based on optical scattering to detect melting in release of strongly shocked materials is presented. This method is used to study the asymptotic behavior of the free surface of shock-loaded materials. After reflection of a shock wave from a metallic sample free surface, occurrence of a solid to liquid transition will induce a dynamic behavior such as mass ejection and development of instabilities. A study of the mass ejection due to laser-induced shock waves in aluminium, copper, and tin targets is presented. Shock waves of order of hundreds of kilobars to more than one megabar are produced by a Nd:YAG laser system with a wavelength of 1.06 μm, pulse width of 7 ns FWHM focused to spot of 200 μm. The velocities, size, and topological structure of the ejected particles are measured. The radii of the ejecta are in the range 0.5–7 μm.

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Asymptotic measurements of free surface instabilities in laser-induced shock waves

  • M. Werdiger (a1), B. Arad (a1), Z. Henis (a1), Y. Horowitz (a1), E. Moshe (a1), S. Maman (a1), A. Ludmirsky (a1) and S. Eliezer (a1)...

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