Optical emission of graphite plasma generated in ambient air using low-irradiance carbon dioxide laser pulses

Time-integrated optical emission analysis of laser-induced plasma on Teflon is presented. Plasma was induced under atmospheric pressure air using TEA CO2 (Transversely Excited Atmospheric carbon dioxide) laser pulses. Teflon is a carbon-based polymer that is, among other things, interesting as a substrate for LIBS analysis of liquid samples. The research aimed to determine the optimal experimental conditions for obtaining neutral and ionized carbon spectral lines and C2 and CN molecular bands emission suitable for spectrochemical purposes. Evaluation of plasma parameters was done using several spectroscopic techniques. Stark profiles of appropriate carbon ionic lines were used to determine electron number density. The ratio of the integral intensity of ionic to atomic carbon spectral lines was used to determine the ionization temperature. Spectral emission of C2 Swan and CN violet bands system was used to determine the temperature of the colder, peripheral parts of plasma. We critically analyzed the use of molecular emission bands as a tool for plasma diagnostics and suggested methods for possible improvements.

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“…The LIBS setup shown in figure 1 has been described in detail elsewhere [15], and we will briefly recall its main characteristics.…”

Section: Methodsmentioning

confidence: 99%

Diagnostics of laser-induced plasma on carbon-based polymer material using atomic and molecular emission spectra

Petrović¹,

Ranković²,

Kuzmanović³

et al. 2023

Plasma Sci. Technol.

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“…A significantly higher ionization temperature (18 100 K) was determined from the line intensity ratios of the ionic and atomic C II/C I carbon lines (250.91 nm and 247.86 nm). Details regarding temperature determination using these carbon lines are given in [32]. The difference in ionization temperatures comes from the differences in ionization energies of carbon and magnesium, which has the effect of carbonemitting from warmer plasma zones relative to magnesium.…”

Section: Determination Of Temperaturementioning

confidence: 99%

Application of laser-induced breakdown spectroscopy for the analysis of pig bones

Marković,

Ranković,

Savić

et al. 2023

Meas. Sci. Technol.

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An application of the laser-induced breakdown spectroscopy technique (LIBS) for the elemental analysis of pig shoulder bone samples is reported. Measurements were performed using a compact laboratory-made LIBS system based on the TEA CO2 laser and time-integrated signal detection. The recorded spectra consisted of well-defined atomic and single-charged ionic lines of bone matrix elements (Ca and P) and other constituent elements (e.g., Mg, Zn, Na, K, and C) with a good signal-to-noise ratio suitable for chemical analysis. Based on the elemental composition of bone samples measured by inductively coupled plasma emission spectroscopy, limits of detection of LIBS analysis were estimated for several elements. Limits of detection ranged from 2.2 ppm (K) to 16 ppm (Zn). Carbon and H spectral lines were used for plasma diagnostics by measuring Stark widths. Optical profilometry was used to assess the capability of LIBS for depth profile analysis. For laser fluence between 13.0 and 18.2 J cm-2, the ablation rate per pulse ranged from 6 to 10 μm.

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Libs Hydrogen Isotopes Detection: Significance in Nuclear/Fusion Technology

Trtica,

Savovic,

Kuzmanovic

et al. 2024

J Appl Spectrosc

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Optical emission of graphite plasma generated in ambient air using low-irradiance carbon dioxide laser pulses

Cited by 6 publications

References 53 publications

Diagnostics of laser-induced plasma on carbon-based polymer material using atomic and molecular emission spectra

Diagnostics of laser-induced plasma on carbon-based polymer material using atomic and molecular emission spectra

Application of laser-induced breakdown spectroscopy for the analysis of pig bones

Libs Hydrogen Isotopes Detection: Significance in Nuclear/Fusion Technology

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