Analysis by laser-induced breakdown spectroscopy of complex solids, liquids, and powders with an echelle spectrometer

2003 ◽  
Vol 42 (30) ◽  
pp. 6029 ◽  
Author(s):  
Pascal Fichet ◽  
Denis Menut ◽  
René Brennetot ◽  
Evelyne Vors ◽  
Annie Rivoallan
Keyword(s):  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Echelle Spectrometer

Laser-Induced Breakdown Spectroscopy for the On-Line Multielement Analysis of Highly Radioactive Glass Melt. Part I: Characterization and Evaluation of the Method

2002 ◽  
Vol 56 (4) ◽  
pp. 437-448 ◽  
Author(s):  
Jong-Il Yun ◽  
Reinhardt Klenze ◽  
Jae-Il Kim
Keyword(s):  
Spectral Range ◽  
Liquid Waste ◽  
Plasma Temperature ◽  
Multielement Analysis ◽  
Laser Induced Breakdown Spectroscopy ◽  
High Level Liquid Waste ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
On Line ◽  
Echelle Spectrometer

Laser-induced breakdown spectroscopy (LIBS) is presented for the on-line multielement analysis of molten radioactive glass at a simulated vitrification process of high level liquid waste (HLLW). A plasma plume is produced by focusing the third harmonic of a Nd: YAG laser (λ = 355 nm) onto the glass melt surface at 1200 °C, and the plasma emission is guided via optical fiber and is characterized by an echelle spectrometer for the spectral range from 200 to 780 nm with a resolution of ±0.01 nm. Compared to a Czerny–Turner spectrometer, the echelle spectrometer appears distinctively superior for its broad operational spectral range and high resolution. The laser-induced plasma is found as optically thin and locally in thermodynamic equilibrium (LTE) as characterized by measuring the electron density and plasma temperature. The matrix temperature effect on the spectral emission is observed as significant, increasing the emission line intensities with increasing temperature, but differently from element to element. The applicability of LIBS is demonstrated on a laboratory scale with an inactive simulated HLLW glass melt for various analytical characteristics concerned.

scholarly journals New spectral reduction algorithm for echelle spectrometer in laser-induced breakdown spectroscopy

2018 ◽  
Vol 26 (26) ◽  
pp. 34131
Author(s):  
Meng Shen ◽  
Zhongqi Hao ◽  
Xiangyou Li ◽  
Changmao Li ◽  
Lianbo Guo ◽  
...  
Keyword(s):  
Laser Induced Breakdown Spectroscopy ◽  
Reduction Algorithm ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Spectral Reduction ◽  
Echelle Spectrometer

Nanosecond laser-induced breakdown assisted by femtosecond laser pre-ionization in air: the effect on spatial resolution and continuous radiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20701
Author(s):  
Bo Li ◽  
Xiaofeng Li ◽  
Zhifeng Zhu ◽  
Qiang Gao
Keyword(s):  
Femtosecond Laser ◽  
Spatial Resolution ◽  
Laser Induced Breakdown Spectroscopy ◽  
Nanosecond Laser ◽  
Breakdown Threshold ◽  
Powerful Technique ◽  
Breakdown Spectroscopy ◽  
Continuous Radiation ◽  
Laser Induced Breakdown

Laser-induced breakdown spectroscopy (LIBS) is a powerful technique for quantitative diagnostics of gases. The spatial resolution of LIBS, however, is limited by the volume of plasma. Here femtosecond-nanosecond dual-pulsed LIBS was demonstrated. Using this method, the breakdown threshold was reduced by 80%, and decay of continuous radiation was shortened. In addition, the volume of the plasma was shrunk by 85% and hence, the spatial resolution of LIBS was significantly improved.

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