Spatial confinement effects of laser-induced breakdown spectroscopy at reduced air pressures

Zeng, Hao; Deng, Zhiwei; Liu, Li; Shi, Jiulin; He, Xingdao

doi:10.1007/s12200-022-00020-9

Cited by 7 publications

(2 citation statements)

References 39 publications

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“…The line broadening increased after applying the external field. This is accomplished by limiting the expansion of the plasma plume, which in turn causes the ne to increase, giving the appearance that the line profile is broadening [52]. The n e was determined according to Stark broadening effect (Eq.…”

Section: Magnetic Fieldmentioning

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: Magnetic Fieldmentioning

confidence: 99%

Characterization of Magnetized-Plasma System Induced by Laser

Abbas,

Abbas

2023

IJP

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“…The literature describes various applications of the LIBS method to determine the qualitative composition of materials in various states, only in solids, including soils, diatomaceous earths, or uranium oxides, but also in liquids and gases [ 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Laser Emission Spectroscopy of Graphene Oxide Deposited on 316 Steel and Ti6Al4V Titanium Alloy Suitable for Orthopedics

et al. 2023

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This paper presents the results of an analysis of carbon (in the form of graphene oxide) deposited on the surface of threads made from stainless steel 316 and titanium alloy Ti6Al4V used in orthopedics using Laser Induced Breakdown Spectroscopy (LIBS). The aim of the article is to indicate the possibility of using the LIBS spectra for the study of thin layers, including graphene derivatives and other elements. Stratigraphic measurements allowed the detection of differences in the spectra peaks of individual elements, not only in the surface layer itself and in the native material, but also in the intermediate layer connecting the two layers. Due to the clear difference in the outline of the spectrum of graphene oxide and the spectrum of the native material of the samples analyzed, a clear incorporation of carbon atoms into the surface layer was observed. A factor analysis was performed, which confirmed the incorporation of graphene oxide into the surface layer of the native material of the elements examined.

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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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Spatial confinement effects of laser-induced breakdown spectroscopy at reduced air pressures

Cited by 7 publications

References 39 publications

Characterization of Magnetized-Plasma System Induced by Laser

Characterization of Magnetized-Plasma System Induced by Laser

Laser Emission Spectroscopy of Graphene Oxide Deposited on 316 Steel and Ti6Al4V Titanium Alloy Suitable for Orthopedics

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

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