Fraunhofer-type signal for underwater measurement of copper sample using collinear long-short double-pulse laser-induced breakdown spectroscopy

Cui, Minchao; Deguchi, Yoshihiro; Wang, Zhenzhen; Tanaka, Seiya; Xue, Bowen; Yao, Changfeng; Zhang, Dinghua

doi:10.1016/j.sab.2020.105873

Cited by 16 publications

(22 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The output beams of these two channels are combined inside the laser head and output from the same external telescope. The detailed optical diagram of LS-2145LIBS laser is available in the experimental section of our previous paper [8]. In addition, in order to measure the pulse shape of the LS-2145LIBS laser, a Si photodiode sensor (Hamamatsu, S1336-18BQ) was placed near the light path.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Signal Improvement for Underwater Measurement of Metal Samples Using Collinear Long-Short Double-Pulse Laser Induced Breakdown Spectroscopy

et al. 2020

Self Cite

View full text Add to dashboard Cite

We employed a collinear long-short double-pulse laser induced breakdown spectroscopy (LS-DP-LIBS) to detect the underwater metal samples. The emission spectra, time-resolved signal, plasma images and sound characteristics of plasma shockwaves are experimentally investigated in this work. The results show that the underwater signal of Al, Cu and Fe spectral lines are significantly improved by collinear LS-DP-LIBS with inter-pulse delay of 35 us. The mechanism of the signal improvement is considered to be the pre irradiation effect of the long pulse laser beam. In the collinear LS-DP-LIBS method, the long pulse first generates a cavitation bubble in water and provides a gaseous environment. Then the short pulse generates the plasma from the sample surface. The present experiments show that the collinear LS-DP-LIBS method offers a significant signal improvement in underwater measurement of metal samples. This new method has great potential in deep-sea exploration using LIBS.

show abstract

Section: Methodsmentioning

confidence: 99%

“…Cui et al have studied the Fraunhofer-type signal for underwater measurement of copper samples. Their results have suggested that the Fraunhofer-type signal can possibly be used for quantitative measurement of underwater LIBS [8]. Zhang et al have proposed a capillary mode LIBS method to detect the elemental concentrations in solution.…”

Section: Introductionmentioning

confidence: 99%

Signal Improvement for Underwater Measurement of Metal Samples Using Collinear Long-Short Double-Pulse Laser Induced Breakdown Spectroscopy

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The absorption phenomenon that appears in the early plasma stage is known as Fraunhofer-type absorption. 34,36,37 Usually, the plasma is not uniform with the ''cold'' outer plasma region and ''hot'' plasma core. During the early plasma stage, the continuum radiation from the ''hot'' plasma core is absorbed by the ''cold'' outer shell.…”

Section: Intra-pulse Delay Time Effectmentioning

confidence: 99%

“…33 The superior detection ability for underwater measurement was verified by the measurement of the Al sample and copper sample under water. 30,34 The accuracy of the DP-LIBS technique for underwater analysis has also been demonstrated, such as the calibration curve of copper alloy samples. 24 In these studies, the measured targets underwater were mainly Al alloy, copper alloy for qualitative and quantitative analysis of the DP-LIBS technique.…”

Section: Introductionmentioning

confidence: 98%

“…A developed collinear long-short doublepulse laser-induced breakdown spectroscopy (LS-DP-LIBS) method was proposed to improve the accuracy and plasma stability using the long-pulse width laser in our previous works. [30][31][32][33][34] A significant difference of proposed LS-DP-LIBS is that the long-pulse width is tens or hundreds of ms compared with conventional DP-LIBS studies. The breakdown threshold cannot be reached to produce plasma using this long-pulse width laser only.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quantitative Analysis of Manganese in Underwater Steel Samples Using Long–Short Double-Pulse Laser-Induced Breakdown Spectroscopy

et al. 2021

Self Cite

View full text Add to dashboard Cite

The long–short double-pulse laser-induced breakdown spectroscopy (LS-DP-LIBS) method was applied to qualitative and quantitative analyses of underwater steel samples to improve the detection ability of underwater measurement. The stable plasma intensity and discrete emission lines were detected using LS-DP-LIBS when comparing the measured results of single-pulse LIBS (SP-LIBS) and LS-DP-LIBS. The long pulse produces a cavitation bubble without plasma, and the short pulse induces the plasma of steel samples within the bubble. The detection features of LS-DP-LIBS for underwater steel samples were discussed in different intra-pulse delay time, long-pulse width, and delay time conditions when analyzing the measured spectra, the signal intensity of Fe(I) at 400.524 nm and 402.187 nm, Mn(I) at 404.136 nm, and intensity ratio of Mn(I) 404.136 nm/Fe(I) 402.187 nm. The results indicated that the plasma stability and spectral signal intensity were improved significantly with a long-pulse width of 80 µs in the intra-pulse delay time of 70 µs, which were appropriate for bubble formation and plasma generation. According to the discussion of the delay time effect, the state of generated plasma was almost stable from 650 ns to 850 ns. Manganese (Mn) contents in steel samples were analyzed quantitatively when measuring five steel samples with different Mn contents using LS-DP-LIBS in optimal experimental conditions. A strong linear dependence was observed with R2=0.9842, which demonstrated the feasibility and appropriateness of quantitative analysis for underwater measurement using LS-DP-LIBS.

show abstract

Quantitative analysis of copper-molybdenum slurries based on low energy pulse laser, combined with artificial neural network and principal component analysis

Li,

Zhao,

Ren

et al. 2024

Minerals Engineering

View full text Add to dashboard Cite

Fraunhofer-type signal for underwater measurement of copper sample using collinear long-short double-pulse laser-induced breakdown spectroscopy

Cited by 16 publications

References 38 publications

Signal Improvement for Underwater Measurement of Metal Samples Using Collinear Long-Short Double-Pulse Laser Induced Breakdown Spectroscopy

Signal Improvement for Underwater Measurement of Metal Samples Using Collinear Long-Short Double-Pulse Laser Induced Breakdown Spectroscopy

Quantitative Analysis of Manganese in Underwater Steel Samples Using Long–Short Double-Pulse Laser-Induced Breakdown Spectroscopy

Quantitative analysis of copper-molybdenum slurries based on low energy pulse laser, combined with artificial neural network and principal component analysis

Contact Info

Product

Resources

About