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Proceedings Paper

Experimental study of the parameters of the laser-induced plasma observed in welding of iron targets with continuous high-power CO2 lasers
Author(s): Anne Poueyo; Lilian Sabatier; G. Deshors; Remy Fabbro; Angel M. de Frutos; Dionisio Bermejo; Jose M. Orza
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Paper Abstract

It is well known that the metallic plasmas observed in laser welding are of great importance for the processes of absorption and energy transport to the target. The microscopic parameters of this plasma, which are the electronic temperature and plasma density, have been studied using spectroscopic measurements. Typical temperatures of 6000 - 7000 K and densities of about 1017 cm-3 were obtained. From these measurements, the transmission of the plasma plume and its refractivity could be estimated and compared to the corresponding experimental results. For the absorption measurements, an integrating sphere has been used. It was observed that the absorption coefficient is closely correlated to the spatial and temporal behavior of the plasma and the effect of refraction is of primary importance for laser processing when using gases other then helium at high laser intensity.

Paper Details

Date Published: 1 October 1991
PDF: 8 pages
Proc. SPIE 1502, Industrial and Scientific Uses of High-Power Lasers, (1 October 1991); doi: 10.1117/12.46891
Show Author Affiliations
Anne Poueyo, ETCA/CNRS (France)
Lilian Sabatier, ETCA/CNRS (France)
G. Deshors, ETCA/CNRS (France)
Remy Fabbro, ETCA/CNRS (France)
Angel M. de Frutos, Univ. de Valladolid (Spain)
Dionisio Bermejo, Instituto de la Estructura de la Materia/CSIC (Spain)
Jose M. Orza, Instituto de la Estructura de la Materia/CSIC (Spain)


Published in SPIE Proceedings Vol. 1502:
Industrial and Scientific Uses of High-Power Lasers
Jean Pierre Billon; Edouard Fabre, Editor(s)

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