20 February 2012 Laser-induced breakdown spectroscopy with improved spectral resolutions through the generation of high-temperature and low-density plasmas
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Proceedings Volume 8244, Laser-based Micro- and Nanopackaging and Assembly VI; 82440H (2012); doi: 10.1117/12.910352
Event: SPIE LASE, 2012, San Francisco, California, United States
Abstract
Improved spectral resolutions were achieved in laser-induced breakdown spectroscopy (LIBS) through generation of high-temperature and low-density plasmas. A first pulse from a KrF excimer laser was used to produce particles by perpendicularly irradiating targets in air. A second pulse from a 532 nm Nd:YAG laser was introduced parallel to the sample surface to reablate the particles. Optical scattering from the first-pulse plasmas was imaged to elucidate particle formation in the plasmas. Narrower line widths (full width at half maximums: FWHMs) and weaker self-absorption were observed from time-integrated LIBS spectra. Estimation of plasma temperatures and densities indicates that high temperature and low density can be achieved simultaneously in plasmas to improve LIBS resolutions.
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X. N. He, L. B. Guo, Z. Q. Xie, X. Huang, W. Hu, X. Y. Zeng, Y. F. Lu, "Laser-induced breakdown spectroscopy with improved spectral resolutions through the generation of high-temperature and low-density plasmas", Proc. SPIE 8244, Laser-based Micro- and Nanopackaging and Assembly VI, 82440H (20 February 2012); doi: 10.1117/12.910352; https://doi.org/10.1117/12.910352
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KEYWORDS
Plasmas

Laser induced breakdown spectroscopy

Particles

Nd:YAG lasers

Aluminum

Laser scattering

Spectral resolution

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