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Experimental evidence of the generation of multi-hundred megabar pressures in 0.26 μm wavelength laser experiments

Published online by Cambridge University Press:  09 March 2009

R. Fabbro ,
B. Faral ,
J. Virmont ,
H. Pepin ,
F. Cottet  and
J. P. Romain
R. Fabbro
Affiliation:
Groupe de Recherches Coordonnées-Interaction Laser Matière, Ecole Polytechnique, 91128, Palaiseau Cédex, France
B. Faral
Affiliation:
Groupe de Recherches Coordonnées-Interaction Laser Matière, Ecole Polytechnique, 91128, Palaiseau Cédex, France
J. Virmont
Affiliation:
Groupe de Recherches Coordonnées-Interaction Laser Matière, Ecole Polytechnique, 91128, Palaiseau Cédex, France
H. Pepin
Affiliation:
Groupe de Recherches Coordonnées-Interaction Laser Matière, Ecole Polytechnique, 91128, Palaiseau Cédex, France
F. Cottet
Affiliation:
Groupe de Recherches Coordonnées-Interaction Laser Matière, Ecole Polytechnique, 91128, Palaiseau Cédex, France
J. P. Romain
Affiliation:
Groupe de Recherches Coordonnées-Interaction Laser Matière, Ecole Polytechnique, 91128, Palaiseau Cédex, France
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Abstract

A 9 μm thick aluminium foil is accelerated to a velocity of about 160 km/s by a laser of 0.26 μm wavelength and intensity of 1015 W/cm2 and collides with an aluminium impact foil. The measurement of the velocity of the induced shock wave in the impact foil, using a step method at the rear of the impact foil, gives pressures in the multi-hundred megabar range. The dynamics and constraints of this shock wave are presented and the effect of X-ray preheating, which can be important at this laser wavelength, is discussed.

Type
Research Article
Information
Laser and Particle Beams , Volume 4 , Issue 3-4 , August 1986 , pp. 413 - 419
Copyright
Copyright © Cambridge University Press 1986

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