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Temperature measurements of very high pressure laser shocks above 100 Mbars using time-resolved X-UV spectroscopy

Published online by Cambridge University Press:  09 March 2009

Remy Fabbro  and
Bernard Faral
Remy Fabbro
Affiliation:
Laboratoire d'Application des Lasers de Puissance (Unité mixte ETCA-CNRS), 16 bis Ave. Prieur de la Cote d'Or, 94114 Arcueil Cedex, France
Bernard Faral
Affiliation:
Laboratoire d'Application des Lasers de Puissance (Unité mixte ETCA-CNRS), 16 bis Ave. Prieur de la Cote d'Or, 94114 Arcueil Cedex, France
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Abstract

Impedance-matching experiments are realized with a 0.26-μm-wavelength high-intensity laser irradiation of two-layered targets (Al-Au). From an ablation pressure of 50 Mbars produced in Al, a 100-Mbar shock pressure is obtained in Au. The X-UV emissivity of this shock at its breakthrough at the rear of the target is analyzed with a transmission grating coupled to an X-ray streak camera. Results obtained with various thicknesses of Al and constant Au thickness are shown, and compared with hydrodynamic codes where radiative transfer processes are taken into account. These preliminary experiments show that the estimated shock temperatures are consistent with the high pressures generated. This technique appears to be very promising for the task of obtaining equation-of-state data in these high-pressure ranges.

Type
Research Article
Information
Laser and Particle Beams , Volume 9 , Issue 2 , June 1991 , pp. 397 - 402
Copyright
Copyright © Cambridge University Press 1991

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References

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