On the enhancement of laser induced breakdown spectroscopy signal in double pulse configuration

G. Cristoforetti; S. Legnaioli; V. Palleschi; L. Pardini; A. Salvetti; E. Tognoni

doi:10.1117/12.714161

12 September 2006 On the enhancement of laser induced breakdown spectroscopy signal in double pulse configuration

G. Cristoforetti, S. Legnaioli, V. Palleschi, L. Pardini, A. Salvetti, E. Tognoni

Proceedings Volume 6284, International Conference on Lasers, Applications, and Technologies 2005: Laser Technologies for Environmental Monitoring and Ecological Applications, and Laser Technologies for Medicine; 628406 (2006) https://doi.org/10.1117/12.714161
Event: International Conference on Lasers, Applications, and Technologies 2005, 2005, St. Petersburg, Russian Federation

Abstract

Laser Induced Breakdown Spectroscopy (LIBS) performed in double pulse (DP) configuration is a promising development of the traditional well-known LIBS, which makes use of a single laser pulse for the ablation of the sample. In the DP configuration a pair of pulses, delayed the one with respect to the other by a temporal gap of the order of 1 - 10 μs, is used for the ablation of material from the target surface and consequent formation of a plasma plume; depending on the experimental conditions, large enhancements of the resulting LIBS signal can be obtained. In this paper, the main physical mechanisms underlying double-pulse LIBS measurements are discussed, in order to obtain a deeper insight of the effects resulting in the signal enhancement obtained in DP-LIBS with respect to single pulse LIBS. The effect of laser energy, buffer gas type and density is discussed. A model of DP LIBS is proposed in terms of the Sedov strong explosion theory.

Citation Download Citation

G. Cristoforetti, S. Legnaioli, V. Palleschi, L. Pardini, A. Salvetti, and E. Tognoni "On the enhancement of laser induced breakdown spectroscopy signal in double pulse configuration", Proc. SPIE 6284, International Conference on Lasers, Applications, and Technologies 2005: Laser Technologies for Environmental Monitoring and Ecological Applications, and Laser Technologies for Medicine, 628406 (12 September 2006); https://doi.org/10.1117/12.714161

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