Temporal and Spatial Evolution of a Laser-Induced Plasma from a Steel Target

Authors: Corsi, M.; Cristoforetti, G.; Hidalgo, M.; Iriarte, D.; Legnaioli, S.; Palleschi, V.; Salvetti, A.; Tognoni, E.

Source: Applied Spectroscopy, Volume 57, Issue 6, Pages 187A-198A and 591-727 (June 2003) , pp. 715-721(7)

Publisher: Society for Applied Spectroscopy

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Abstract:

The space and time evolution of a laser-induced plasma from a steel target has been studied using optical time-of-flight and shadowgraphic techniques. The results, obtained for two distinct laser energy regimes, allow us to individuate two different regions in the plume, one characterized by air and continuum emissions produced by the shock wave ionization and the other characterized by emissions from ablated material. Moreover, it was shown that a sufficiently high laser fluence and short delay time of acquisition are needed to avoid inhomogeneous effects in the plasma, as required in analytical applications such as laser-induced breakdown spectroscopy.

Keywords: LASER-INDUCED BREAKDOWN SPECTROSCOPY; SPECIES DISTRIBUTION; TIME OF FLIGHT; SHADOWGRAPHY

Document Type: Research article

DOI: http://dx.doi.org/10.1366/000370203322005436

Publication date: 2003-06-01

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