Assessment of laser induced breakdown spectroscopy accuracy for determination of hydrogen accumulation in tungsten

Marenkov, E. D.; Tsygvintsev, I. P.; Gasparyan, Yu.; Stepanenko, A. A.

doi:10.1016/j.nme.2021.101029

Cited by 6 publications

(1 citation statement)

References 21 publications

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“…However, the high input power in the laser pulses, used for spectrometric measurements, leads, except for the LIDS technique, to the destruction of the analyzed samples and the formation of a plasma plume near the sample surface, which shields the laser radiation flux. The latter circumstance, as recent analysis shows [28], can lead to significant, up to 100%, errors in determining the concentration of tritium retained in the target.…”

Section: Introductionmentioning

confidence: 99%

Possibility of using machine learning methods to reconstruct solid body parameters during laser-induced desorption analysis

Stepanenko,

Kashin,

Gasparyan

2023

Phys. Scr.

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The possibility of using machine learning methods for solving the inverse problem of the laser-induced desorption quadrupole mass-spectrometry (LID-QMS) diagnostic is studied. The formulation of the problem is given, and a general scheme of its solution is proposed. A test model of gas transport in a solid body is considered, which is used to construct a database of gas transport parameters in the sample. The application of the synthetic data and machine learning methods, viz. the interpolation technique, the method of K nearest neighbors, and the neural networks, for solving the LID-QMS inverse problem is investigated. The advantages and disadvantages of each approach are discussed.

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Section: Introductionmentioning

confidence: 99%

Possibility of using machine learning methods to reconstruct solid body parameters during laser-induced desorption analysis

Stepanenko,

Kashin,

Gasparyan

2023

Phys. Scr.

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In situ measurement of hydrogen concentration in steel using laser-induced breakdown spectroscopy (LIBS)

Quackatz,

Griesche,

Nietzke

et al. 2024

Weld World

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The ISO 3690 standard “Determination of hydrogen content in arc weld metal” requires a thermal activation of the diffusible hydrogen in a piece of weld metal for the subsequent ex situ concentration measurement by carrier gas hot extraction CGHE or thermal desorption spectroscopy (TCD). Laser-induced breakdown spectroscopy (LIBS) offers a time and spatially resolved, almost non-destructive, in situ measurement of hydrogen at surfaces without sample preparation. We measured hydrogen in steels, which were charged either electrochemically or by high-pressure hydrogen gas, and compared the results. Further, the feasibility of quantitative hydrogen line scan measurements with LIBS was demonstrated by measuring hydrogen at water jet cut surfaces. The hydrogen concentrations measured with the help of LIBS were compared with CGHE measurements. It was observed that hydrogen can be reliably measured with LIBS for concentrations larger than 2 wt.-ppm. The maximum hydrogen concentration achieved using electrochemical charging was 85.1 ppm. The results show that LIBS is a promising technique for time- and spatially resolved measurements of hydrogen in steels.

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The influence of the adiabatic index on the radiation dynamics of self-similar expanding laser-produced plasma plume

et al. 2022

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The radiation dynamics of an adiabatic self-similar expanding spherical plasma plume is considered. It is shown that the radiation intensities evolution strongly depends on the adiabatic index γ. For example, it is proven that the radiation intensity in a highly ionized plasma plume increases over time if γ = 5/3 and has a minimum in time if γ < 5/3. The analytical results are compared to measurements of the radiation from lithium laser-produced plasma. A lithium sample was irradiated by a powerful (42 J/cm2) laser pulse, and radiation of produced lithium plasma was registered by a monochromator. Reasonable agreement with the experiments is reached for γ = 5/4.

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Assessment of laser induced breakdown spectroscopy accuracy for determination of hydrogen accumulation in tungsten

Cited by 6 publications

References 21 publications

Possibility of using machine learning methods to reconstruct solid body parameters during laser-induced desorption analysis

Possibility of using machine learning methods to reconstruct solid body parameters during laser-induced desorption analysis

In situ measurement of hydrogen concentration in steel using laser-induced breakdown spectroscopy (LIBS)

The influence of the adiabatic index on the radiation dynamics of self-similar expanding laser-produced plasma plume

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