Numerical description of the interactions between plasma and high-intensity UV laser pulses of nanosecond duration

Johny Neamtu; Gy. Steinbrecker; Carmen Ristoscu; Ion N. Mihailescu

doi:10.1117/12.378179

25 February 2000 Numerical description of the interactions between plasma and high-intensity UV laser pulses of nanosecond duration

Johny Neamtu, Gy. Steinbrecker, Carmen Ristoscu, Ion N. Mihailescu

Author Affiliations +

Proceedings Volume 4070, ALT '99 International Conference on Advanced Laser Technologies; (2000) https://doi.org/10.1117/12.378179
Event: ALT'99 International Conference: Advanced Laser Technologies, 1999, Potenza-Lecce, Italy

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.

Citation Download Citation

Johny Neamtu, Gy. Steinbrecker, Carmen Ristoscu, and Ion N. Mihailescu "Numerical description of the interactions between plasma and high-intensity UV laser pulses of nanosecond duration", Proc. SPIE 4070, ALT '99 International Conference on Advanced Laser Technologies, (25 February 2000); https://doi.org/10.1117/12.378179

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