Abstract
The paper compares the laser-assisted quadrupole mass spectrometry for two laser pulses (15 ns and 80 ps) for W-D films and Ti–V alloy with deuterium. A technique for the production of samples with high concentrations of trapped deuterium, which makes it possible to obtain a good signal repeatability on a quadrupole mass spectrometer for several laser shots, is presented, which can be used to align a diagnostic laser system. The experimental dependence of the total deuterium yield from the studied materials on the energy density is obtained. The high sensitivity of the technique, as well as a weak dependence on the laser pulse duration, is demonstrated. A significant change in the deuterium concentration in the near-surface layer of the tungsten film during contact with the atmosphere is noted.
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Funding
Section 2 of the work was supported by the Ministry of Science and Higher Education of the Russian Federation, contract no. 0723-2020-0043.
Section 3 of the work was supported by the Russian Science Foundation, grant 22-12-00360 “Laser Diagnostics of Hydrogen Isotope Retention in Tokamak Materials Interacting with Plasma.”
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Translated by N. Petrov
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Efimov, N.E., Sinelnikov, D.N., Grishaev, M.V. et al. Analysis of the Influence of Laser Surface Irradiation Regimes in the Diagnostics of Hydrogen Isotope Retention. Phys. Atom. Nuclei 86, 2173–2179 (2023). https://doi.org/10.1134/S1063778823100137
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DOI: https://doi.org/10.1134/S1063778823100137