Influence of Preliminary Irradiation by a High Heat Flux on the Re-emission and Thermal Desorption of Deuterium Implanted from Reduced Activation Steels

The deuterium release from reduced activation Eurofer steel samples is investigated by measuring the re-emission directly during ion irradiation and via thermal desorption spectroscopy without contact with air. A part of the experiments are carried out using a sample previously subjected to high-pow...

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Published inSurface investigation, x-ray, synchrotron and neutron techniques Vol. 12; no. 5; pp. 1032 - 1036
Main Authors Ryabtsev, S. A., Gasparyan, Yu. M., Ogorodnikova, O. V., Harutyunyan, Z. R., Klimov, N. S., Poskakalov, A. G., Pisarev, A. A.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.09.2018
Springer Nature B.V
Subjects
Activation
Chemistry and Materials Science
Desorption
Deuterium
Emission analysis
Heat flux
Heat transfer
Ion irradiation
Materials Science
Radiation damage
Structural damage
Surfaces and Interfaces
Thermal desorption spectroscopy
Thin Films
reduced activation steels
re-emission
thermal desorption spectroscopy
deuterium
ion implantation
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Summary:The deuterium release from reduced activation Eurofer steel samples is investigated by measuring the re-emission directly during ion irradiation and via thermal desorption spectroscopy without contact with air. A part of the experiments are carried out using a sample previously subjected to high-power pulsed thermal action using the QSPA-T setup, Troitsk Institute of Innovative and Thermonuclear Research. Subsequent irradiation is performed using a 5-keV D 3 + ion beam to a fluence of up to 10 21 m –2 at room temperature. In all cases, a major part of the implanted deuterium is released from the sample already at the irradiation stage. A significant part of the deuterium also desorbs in the interval between irradiation and spectroscopic measurements. Deuterium re-emission from damaged samples reaches a maximum value more slowly than that from undamaged ones, and deuterium release during holding is more intense. This can be explained by the structure of the damages caused by the heat flux: the hydrogen-trap concentration grows in the material, and the surface area participating in desorption increases.
ISSN:1027-4510
1819-7094
DOI:10.1134/S1027451018050312