Enhancement of Laser-induced Breakdown Spectroscopy (LIBS) Signal Subject to the Magnetic Confinement and Dual Pulses

Hussain, Atif; Gao, Xun; Asghar, Haroon; Azam, Muhammad; Ain, Quratul; Nawaz, Zeesha

doi:10.1134/s0030400x21040068

Cited by 9 publications

(3 citation statements)

References 37 publications

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“…changing the surrounding gas or working pressures, and inertial confinement using dual laser pulses [39]. Atif et al (2018) [40] investigated what happened to LIBS when they applied an external field at various working pressures using nano-pulsed of Nd: YAG laser while the chamber was filled with helium and argon gases.…”

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confidence: 99%

Characterization of Magnetized-Plasma System Induced by Laser

Abbas,

Abbas

2023

IJP

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This study investigated the effect of applying an external magnetic field on the characteristics of laser-induced plasma, such as its parameters plasma, magnetization properties, emission line intensities, and plasma coefficients, for plasma induced from zinc oxide: aluminum composite (ZO:AL) at an atomic ratio of 0.3 %. Plasma properties include magnetization and emission line intensities. The excitation was done by a pulsed laser of Nd:YAG with 400 mJ energy at atmospheric pressure. Both the electron temperature and number density were determined with the help of the Stark effect principle and the Boltzmann-Plot method. There was a rise in the amount of (ne) and (Te) that was produced by applying a magnetic field and, on the other hand, using the 532 nm wavelength rather than the fundamental wavelength of a laser. The emission lines in the atmosphere's plasma have an appearance of Lorentzian shape. The 532 nm laser exhibited a decrease in both the Larmor radius and the confinement factor compared with the 1064 nm laser. By applying the magnetic field, the Laser Induced Breakdown Spectroscopy (LIBS) intensities increased by 1.44 times when compared to the emissions before applying the field. In addition, the spectral line intensities improved with the fundamental wavelength compared to the second harmonic frequency as a result of the increase in the extracted materials. This is due to the increase in the absorbance of the laser by the target, as some of these materials are excited, so they act as emission sources, which makes them more detectable.

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Section: √ ( )mentioning

confidence: 99%

Characterization of Magnetized-Plasma System Induced by Laser

Abbas,

Abbas

2023

IJP

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“…In recent years, many different methods have been applied to LIBS spectral enhancement to improve the above mentioned problems such as dual-pulse excitation [1,2], spark discharge [3], microwave enhancement [4], spatial confinement [5], magnetic field confinement [6], surface deposition of nanoparticles [7], sample heating [8], or a combination of two or more enhancement methods for improved enhancement effects. Yanwei et al [9] used a cavity-confined LIBS (CC-LIBS) for laser ablation of bauxite samples, and the intensity and signal-to-noise ratio (SNR) of the characteristic spectral lines collected by CC-LIBS were improved compared with the conventional LIBS.…”

Section: Introductionmentioning

confidence: 99%

Double-enhanced LIBS system with N₂ atmosphere and cylindrical cavity confinement for quantitative analysis of Sr element in soil

Wang

et al. 2023

Meas. Sci. Technol.

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To effectively improve the quality of laser-induced plasma spectra and the detection accuracy of laser-induced breakdown spectroscopy simultaneously for Sr element in soil, the dual mechanism of N2 atmosphere combined with cylindrical cavity confinement for laser-induced Sr plasma emission enhancement was proposed and investigated in this paper, and a multi-spectral fusion internal standard analysis model was established. Optimum enhancement effect can be achieved under the conditions of 2 mm diameter and 6 mm height of the confinement cavity in N2 atmosphere, where the enhancement factor was about 3.25, the signal-to-noise ratio reached 710.28, and the LIBS spectrum quality was the best; the relative standard deviation value (2.64%) was the smallest, and the LIBS signal reproducibility was the best. For the samples in this study, the limit of detection of the sample Sr elements under the dual enhancement mechanism was 39.57 mg/kg, which was 41.07% lower than the LOD without enhancement mechanism (67.19 mg/kg), and the R2 of the multispectral fusion internal standard model was 12.14% higher and the relative error was 3.42% lower than that of the internal standard method. The results showed that the dual enhancement mechanism combining N2 atmosphere and cylindrical cavity confinement improved the spectral quality, signal reproducibility, and detection sensitivity.

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“…In addition to laser parameters the plasma processes in LIBS are extremely reliant on the surrounding media, and pressure during laser mater interaction [12]. LIBS can be enhanced by different techniques such as by applying an external magnetic eld [13], using different working pressures, and using dual pulses inertial con nement [14]. Atif et al (2018) [15] studied the effect of an external magnetic eld on LIBS as a function of pressures using Nd: YAG (1064 nm, 8 ns) under helium and argon gases at different working pressures (1-80 kPa).…”

Section: Introductionmentioning

confidence: 99%

Influence of gas pressure on the magnetized plasma parameters of laser-induced breakdown

Abbas

2023

Opt Quant Electron

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In this study, the effect of environment gas and working pressure of laser-induced breakdown spectroscopy (LIBS) from ZnO: Al composite target (AZO) enhanced by an external magnetic eld on the magnetized characteristics and emission spectra of plasma were investigated. The plasma was induced by a Q-switched nanosecond Nd: YAG laser at a constant pulse laser energy of 300 mJ at different pressures of 0.08, 0.2, 0.4, and 760 Torr in air and argon gas. The atomic and ionic emission lines increased in intensity directly with the working pressure. The plasma temperature (T e ) and electron number density (n e ) were determined at the different environmental conditions according to Boltzmann-Plot, and Stark broadening effect, respectively. The n e increased with increasing pressure as a result of increasing electron-atom collisions. While T e reduced with working pressure. The plasma parameters in different conditions satis ed the plasma criteria. The line pro le appeared with high broadening at atmospheric pressure compared with vacuumed plasma. The Larmur radius reduced while the con nement factor β increased with working pressure. From another hand, using Ar instead of air caused to slightly reduced in n e at low pressure of 0.08 Torr, and slightly increased at 0.4 Torr pressure. While the T e has the opposite behavior. Due to the evidence variation of plasma number density with pressure, the plasma frequency values increased with increasing the pressure, with higher values in Ar than air at 0.4 Torr, while slightly lower in Ar than air at 0.08 Torr. λ D and N d have opposite behavior with working pressure.

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Enhancement of Laser-induced Breakdown Spectroscopy (LIBS) Signal Subject to the Magnetic Confinement and Dual Pulses

Cited by 9 publications

References 37 publications

Characterization of Magnetized-Plasma System Induced by Laser

Characterization of Magnetized-Plasma System Induced by Laser

Double-enhanced LIBS system with N₂ atmosphere and cylindrical cavity confinement for quantitative analysis of Sr element in soil

Influence of gas pressure on the magnetized plasma parameters of laser-induced breakdown

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Enhancement of Laser-induced Breakdown Spectroscopy (LIBS) Signal Subject to the Magnetic Confinement and Dual Pulses

Cited by 9 publications

References 37 publications

Characterization of Magnetized-Plasma System Induced by Laser

Characterization of Magnetized-Plasma System Induced by Laser

Double-enhanced LIBS system with N2 atmosphere and cylindrical cavity confinement for quantitative analysis of Sr element in soil

Influence of gas pressure on the magnetized plasma parameters of laser-induced breakdown

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Product

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Double-enhanced LIBS system with N₂ atmosphere and cylindrical cavity confinement for quantitative analysis of Sr element in soil