LIU, L.; LI, S.; HE X., N.; HUANG, X.; ZHANG, C. F.; FAN, S. L.; WANG, M. X.; ZHOU, Yunshen; CHEN, K.; JIANG L., J.; SILVAIN, Jean-François; LU YONG, Feng

doi:10.1364/OE.22.007686

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LIU, L.
Department of Electrical Engineering

LI, S.
Department of Electrical and Computer Engineering [Pittsburgh]

HE X., N.
Department of Electrical Engineering

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Optics Express. 2014, vol. 22, n° 7, p. 7686-7693

Optical Society of America - OSA Publishing

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Flame-enhanced laser-induced breakdown spectroscopy (LIBS) was investigated to improve the sensitivity of LIBS. It was realized by generating laser-induced plasmas in the blue outer envelope of a neutral oxy-acetylene flame. Fast imaging and temporally resolved spectroscopy of the plasmas were carried out. Enhanced intensity of up to 4 times and narrowed full width at half maximum (FWHM) down to 60% for emission lines were observed. Electron temperatures and densities were calculated to investigate the flame effects on plasma evolution. These calculated electron temperatures and densities showed that high-temperature and low-density plasmas were achieved before 4 µs in the flame environment, which has the potential to improve LIBS sensitivity and spectral resolution.< Leer menos

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Flame-enhanced laser-induced breakdown spectroscopy

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