Study on Emission Enhancement of Laser Induced Plasma of Soil

Abstract

Abstract:

Emission characteristics of laser induced plasma of soil in ambient gas are analyzed. The pulsed 1064 nm Nd∶YAG laser is used as ablation source, a microscope plasma is generated in Ar and air atmosphere, and the emission spectral is recorded. The time evolution of the characteristic spectral line and background are recorded and analyzed. By measuring the intensities of the characteristic spectral line with Cr of different concentrations, the calibration lines are obtained in air and Ar atmosphere. The experimental results show that the Ar atmosphere has a marked enhancement effect on the emission characteristics of the laser induced soil plasma, increases the residence time, improve the linear relation between the species concentration and emission spectral intensity, and results in a better LIBS measurement sensitivity.

Key words: soil, laser induced plasma emission spectroscopy, ambient gas, Cr

CLC Number:

CHEN Dong, LIU Wen-Qing, ZHANG Yu-Jun, LIU Jian-Guo, DIAO Na-Jing, LU Cui-Ping, LIU Li-Tuo. Study on Emission Enhancement of Laser Induced Plasma of Soil[J]. Journal of Atmospheric and Environmental Optics, 2010, 5(6): 445-449.

References

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