Optics and Precision Engineering, Volume. 32, Issue 13, 2029(2024)
Enhancement mechanism of coaxial dual-pulse laser-induced breakdown spectroscopy plasma radiation signal
Figures & Tables(11)
Fig. 2. Time evolution of intensity of Al I 308.2 nm line at different pulse intervals in co-axial DP-LIBS
Fig. 3. Effect of laser inter-pulse interval on intensity of multiple spectral lines
Fig. 4. Comparison of original irradiance of second laser beam in co-axial DP-LIBS with different pulse intervals and irradiance after being shielded by plasma
Fig. 5. Actual laser irradiance reaching target surface at a pulse interval of 500 ns
Fig. 6. Spatial distribution of plasma temperature under different excitation conditions
Fig. 8. Spatial distribution of number density of Mg and Al particles in LIBS plasma at 500 ns
Fig. 9. Spatial distribution of number densities of Mg and Al particles in plasma at 500 ns after second laser beam in co-axial DP-LIBS
Table 1. Parameters of aluminium-magnesium alloy targets
View tableView in ArticleTable 1. Parameters of aluminium-magnesium alloy targets
Parameter Value Specific heat，cρ/（J·g-1·K-1） 0.90 Mass density，ρt/（g·cm-3） 2.70 Thermal conductivity，λt/（W·cm-1·K-1） 2.37 Reflectivity， R 0.90 Aborption coefficient，α/cm-1 1.5×106 Melting point， Tm/K 921 （Mg）， 934 （Al） Boiling point， Tb/K 1 363 （Mg）， 2 792 （Al） Heat of fusion，Hf/（J·mol-1） 9.04×103 （Mg），
1.04×104 （Al）
Heat of vaporization， Hv/（J·mol-1） 1.16×105 （Mg），
2.55×105 （Al）
First ionization potential， PI/eV 7.65 （Mg），5.99 （Al）
Table 2. Spectral parameters of alloy constituent elements
View tableView in ArticleTable 2. Spectral parameters of alloy constituent elements
Species E/eV g A/（107 s-1） Al I 308.2 nm 4.021 4 5.87 Al I 396.2 nm 3.143 2 9.85 Al II 466.3 nm 13.256 3 5.81 Mg I 285.2 nm 4.346 3 49.10 Mg II 279.6 nm 4.434 4 28.00
Tools
Get Citation
Copy Citation Text
Yunyi ZHAO, Zhen SONG, Junxiao WANG, Lei ZHANG, Weiguang MA, Lei DONG, Wangbao YIN, Suotang JIA. Enhancement mechanism of coaxial dual-pulse laser-induced breakdown spectroscopy plasma radiation signal[J]. Optics and Precision Engineering, 2024, 32(13): 2029
Paper Information
Category:
Received: Feb. 28, 2024
Accepted: --
Published Online: Aug. 28, 2024
The Author Email:
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20