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Development of holographic methods for investigating a moving free surface, accelerated by laser-induced shock waves

Published online by Cambridge University Press:  01 October 1999

M. WERDIGER ,
S. ELIEZER ,
S. MAMAN ,
Y. HOROVITZ ,
B. ARAD ,
Z. HENIS  and
I.B. GOLDBERG
M. WERDIGER
Affiliation:
Plasma Physics Department, Soreq NRC, Yavne, 81800, Israel
S. ELIEZER
Affiliation:
Plasma Physics Department, Soreq NRC, Yavne, 81800, Israel
S. MAMAN
Affiliation:
Plasma Physics Department, Soreq NRC, Yavne, 81800, Israel
Y. HOROVITZ
Affiliation:
Plasma Physics Department, Soreq NRC, Yavne, 81800, Israel
B. ARAD
Affiliation:
Plasma Physics Department, Soreq NRC, Yavne, 81800, Israel
Z. HENIS
Affiliation:
Plasma Physics Department, Soreq NRC, Yavne, 81800, Israel
I.B. GOLDBERG
Affiliation:
Racah Institute of Physics, Hebrew University, Jerusalem 91904, Israel
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Abstract

Holographic methods developed to study the behavior of surfaces shocked by high power lasers are reported. Shock waves of the order of hundreds of kilobars are generated in Sn targets 50-μm thick, by a Nd:YAG laser system with a wavelength of 1.06 μm, a pulse duration of 7.5 ns FWHM, and irradiance in the range (1.0–2.6)·1013 W/cm2. Two configurations of off-axis holography were applied: holograms based on forward scattering, and holograms of both backward and forward scattering. The hologram is produced by scattering of a pulse, 6.7 ns (FWHM), of green laser light synchronized with the laser that generates the shock wave. Holograms of the topology of the rear surface of shocked Sn targets moving in vacuum and in air (at atmospheric pressure) are reported.

Type
Research Article
Information
Laser and Particle Beams , Volume 17 , Issue 4 , October 1999 , pp. 653 - 660
Copyright
1999 Cambridge University Press

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