Double pulse laser induced breakdown spectroscopy with Gaussian and multimode beams

Lednev, V. N.; Першин, С. М.; Бункин, А. Ф.; Samokhvalov, A. A.; Veiko, Vadim P.; Kudryashov, S. I.; Ионин, А. А.

doi:10.1016/j.sab.2016.08.020

Cited by 11 publications

(3 citation statements)

References 35 publications

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“…As an effective and completive signal enhancement technique for SP-LIBS, understanding the basic enhancement mechanisms is highly desirable. To date, a great effort has been devoted to elucidating the mechanisms that yield the signal enhancement in collinear DP-LIBS [13][14][15][16][17][18][19][20][21][22][23][24]. In general, double pulse LIBS increases the ablation and plasma volume, affects the plasma expansion rates, temperature and ion density in the plasma kernel, and extends the decay time of plasma emissions.…”

Section: Introductionmentioning

confidence: 99%

Nanosecond laser preheating effect on ablation morphology and plasma emission in collinear dual-pulse laser-induced breakdown spectroscopy

Li¹,

Harefa²,

Zhou³

2022

Plasma Sci. Technol.

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A focus-offset collinear dual-pulse laser-induced breakdown spectroscopy (FOC-DP-LIBS) is designed and used to investigate the laser ablation and spectral intensity with an aluminum alloy sample. The laser crater morphologies and ablation volumes were measured. An inter pulse time delay dependent ablation efficiency on a nanosecond laser heated sample was observed, which was similar to the trend of spectral intensity versus inter pulse time delay in the delay time less than 3 s. Based on the observation, the nanosecond pulse laser pre-heating effect on subsequent second laser ablation and signal enhancement is discussed, which will be helpful for understanding the ablation and signal enhancement mechanism in standard collinear DP-LIBS technique.

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Section: Introductionmentioning

confidence: 99%

Nanosecond laser preheating effect on ablation morphology and plasma emission in collinear dual-pulse laser-induced breakdown spectroscopy

Li¹,

Harefa²,

Zhou³

2022

Plasma Sci. Technol.

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show abstract

“…One vital subject among these studies is the analytical performance of LIBS for the industrial application. To improve the performance, many approaches have been developed based on LIBS, such as microwave-assisted LIBS, 22,23 LIBS laser-induced fluorescence (LIF), 24 resonance-enhanced LIBS, 25,26 double-pulse LIBS (DP-LIBS), 27–33 etc. However, it is still difficult to apply LIBS to the steelmaking process because of the terrible measurement conditions in steel plant.…”

Section: Introductionmentioning

confidence: 99%

Improved Analysis of Manganese in Steel Samples Using Collinear Long–Short Double Pulse Laser-Induced Breakdown Spectroscopy (LIBS)

et al. 2018

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A long-short double pulse laser-induced breakdown spectroscopy (long-short DP-LIBS) method was employed to improve the analytical performance of LIBS for the measurement of manganese in steel samples. The long pulse with a duration of 60 μs was generated using a neodymium-doped yttrium aluminum garnet (Nd:YAG) laser which was operated at free-running (FR) mode. To investigate the detection ability without sample preparation, the steel washers were tested using single-pulse LIBS (SP-LIBS) and long-short DP-LIBS, respectively. The measurement results show that long-short DP-LIBS was able to record clear spectra from the steel washers with a surface layer. Through the observation on the laser craters with a scanning electron microscope (SEM), the results suggest that the improvement in detection ability can be attributed to the pre-irradiation effect of long-pulse laser beam. Next, the analytical performance for quantitative measurement of manganese was evaluated employing ten standard steel samples. The results show that the linearity fit (R) of the calibration curve is 0.988 for long-short DP-LIBS, whereas, R is only 0.810 for SP-LIBS under the same measurement conditions. The repeated measurement results show that the average relative standard deviation (RSD) of the tested samples is 29.3% for SP-LIBS and is 10.5% for long-short DP-LIBS. The prediction results also show that the average relative error of prediction (REP) is 94.9% for SP-LIBS and is 4.9% for long-short DP-LIBS.

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“…Picosecond and femtosecond laser pulses can be a better laser source for some specific LA ICP MS and LIBS applications due to particular features of short and ultrashort laser ablation like the absence of a heat affected zone and the smallest laser crater dimensions (elemental mapping), decreased ablation stress for nearby areas in the case of biological samples analysis, absence of fractional evaporation and the small ablation mass [8][9][10][11][12][13]. An alternative way to improve LIBS analytical performance is Laser Physics Letters Laser induced breakdown spectroscopy with picosecond pulse train to use a so-called double pulse technique which utilizes two successive nanosecond laser pulses with microsecond delay for ablation [14][15][16][17][18][19]. Double pulse LIBS results in significant improvement of the signal-to-noise ratio and reproducibility thus enhancing sensitivity and accuracy of LIBS analysis due to laser ablation mechanism changes [17].…”

Section: Introductionmentioning

confidence: 99%

Laser induced breakdown spectroscopy with picosecond pulse train

et al. 2016

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Picosecond pulse train and nanosecond pulse were compared for laser ablation and laser induced breakdown spectroscopy (LIBS) measurements. A detailed study revealed that the picosecond pulse train ablation improved the quality of laser craters (symmetric crater walls and the absence of large redeposited droplets), which was explained by a smaller heat affected zone and suppression of melt splash. Greater plasma dimensions and brighter plasma emission were observed by gated imaging for picosecond pulse train compared to nanosecond pulse ablation. Increased intensity of atomic and ionic lines in gated and time integrated spectra provided better signal-to-noise ratio for picosecond pulse train sampling. Higher temperature and electron density were detected during first microsecond for the plasma induced by the picosecond pulse train. Improved shot-to-shot reproducibility for atomic/ionic line intensity in the case of picosecond pulse train LIBS was explained by more effective atomization of target material in plasma and better quality of laser craters. Improved precision and limits of detections were determined for picosecond pulse train LIBS due to better reproducibility of laser sampling and increased signal-to-noise ratio.

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Double pulse laser induced breakdown spectroscopy with Gaussian and multimode beams

Cited by 11 publications

References 35 publications

Nanosecond laser preheating effect on ablation morphology and plasma emission in collinear dual-pulse laser-induced breakdown spectroscopy

Nanosecond laser preheating effect on ablation morphology and plasma emission in collinear dual-pulse laser-induced breakdown spectroscopy

Improved Analysis of Manganese in Steel Samples Using Collinear Long–Short Double Pulse Laser-Induced Breakdown Spectroscopy (LIBS)

Laser induced breakdown spectroscopy with picosecond pulse train

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