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Proceedings Paper

Numerical description of the interactions between plasma and high-intensity UV laser pulses of nanosecond duration
Author(s): Johny Neamtu; Gy. Steinbrecker; Carmen Ristoscu; Ion N. Mihailescu
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Paper Abstract

We report a numerical study of the main phenomena that are characteristic of the interaction between high-intensity UV laser pulses and solid targets in low-pressure ambient gas. The impact of laser radiation action on solid surface is described by solving the 1D heat conduction equation. The interaction between laser radiation and the plasma expanding in front of target is modeled by the gas-dynamics equations. The model includes laser irradiation absorption by target vapors through Inverse Bremsstrahlung and photoionization absorption. The transit of ablated material from target to collector is treated by a Monte Carlo method. The goal of our study is to determine the influence of the irradiation conditions and the ambient gas pressure upon the velocity, density and temperature of the ejected particles. The results of our analysis are in good concordance with experimental measurements obtained by reactive pulsed laser deposition from Ti and Al targets in low-pressure nitrogen atmosphere.

Paper Details

Date Published: 25 February 2000
PDF: 6 pages
Proc. SPIE 4070, ALT '99 International Conference on Advanced Laser Technologies, (25 February 2000); doi: 10.1117/12.378179
Show Author Affiliations
Johny Neamtu, Univ. of Medicine and Pharmacy Craiova (Romania)
Gy. Steinbrecker, Univ. of Craiova (Romania)
Carmen Ristoscu, Institute of Atomic Physics (Romania)
Ion N. Mihailescu, Institute of Atomic Physics (Romania)

Published in SPIE Proceedings Vol. 4070:
ALT '99 International Conference on Advanced Laser Technologies
Vladimir I. Pustovoy; Vitali I. Konov, Editor(s)

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