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Laser shock processing of materials: experimental study of breakdown plasma effects at the surface of confining water
Author(s): Laurent Berthe; Remy Fabbro; Patrice Peyre; Eric Bartnicki
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Paper Abstract

Laser Shock Processing in water confinement regime was investigated for an incident 25 - 30 ns/40 J/(lambda) equals 1.064 micrometers laser beam. The experimental measurement of the transmission of the parasitic plasma breakdown at the surface of water confining has been performed with continuous Argon laser probe. Above 6 GW/cm2, the critical electronic density for the incident laser wavelength is achieved in the plasma by cascade ionization. Above 10 GW/cm2, it has been shown that the power density transmitted through the plasma is limited at 10 GW/cm2. The laser pulse transmitted through the breakdown plasma corresponds to the part of incident laser pulse preceding the transmission cut-off. Results are in good agreement with those obtained previously.

Paper Details

Date Published: 18 August 1997
PDF: 6 pages
Proc. SPIE 3097, Lasers in Material Processing, (18 August 1997); doi: 10.1117/12.281117
Show Author Affiliations
Laurent Berthe, Lab. d'Application des Lasers de Puissance (France)
Remy Fabbro, Lab. d'Application des Lasers de Puissance (France)
Patrice Peyre, Lab. d'Application des Lasers de Puissance (France)
Eric Bartnicki, Lab. d'Application des Lasers de Puissance (France)

Published in SPIE Proceedings Vol. 3097:
Lasers in Material Processing
Leo H. J. F. Beckmann, Editor(s)

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