Improving sensitivity of laser-induced breakdown spectroscopy using laser plasma interaction

Alexey A. Il'in; Sergey S. Golik; Ivan G. Nagorny; Alexey V. Bulanov

doi:10.1117/12.723088

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1 November 2006 Improving sensitivity of laser-induced breakdown spectroscopy using laser plasma interaction

Alexey A. Il'in, Sergey S. Golik, Ivan G. Nagorny, Alexey V. Bulanov

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Proceedings Volume 6522, Thirteenth Joint International Symposium on Atmospheric and Ocean Optics/ Atmospheric Physics; 65220Z (2006) https://doi.org/10.1117/12.723088
Event: Thirteenth Joint International Symposium on Atmospheric and Ocean Optics/ Atmospheric Physics, 2006, Tomsk, Russian Federation

Abstract

Laser plasmas interaction and spectral characteristics of plasma were investigated at a laser breakdown in a normal atmosphere with the purpose of improving laser-induced breakdown spectroscopy sensitivity. Colliding plasmas interaction was investigated depending on mechanism of absorption wave of laser radiation and distance between foci. Laser supported detonation wave, breakdown wave and fast wave of ionization are absorption wave observed in experiment. It was shown that seed electrons for cascade breakdown in front of fast wave of ionization is occurred due to oxygen molecules photoionization. Molecular emission and collapse of intensity of plasma continuum during the initial moments of laser plasma expansion were registered. The line/continuum ratio was essentially increased in case of laser plasmas interaction. Thus laser plasmas interaction improves sensitivity of LIBS.

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Alexey A. Il'in, Sergey S. Golik, Ivan G. Nagorny, and Alexey V. Bulanov "Improving sensitivity of laser-induced breakdown spectroscopy using laser plasma interaction", Proc. SPIE 6522, Thirteenth Joint International Symposium on Atmospheric and Ocean Optics/ Atmospheric Physics, 65220Z (1 November 2006); https://doi.org/10.1117/12.723088

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