Thermal desorption spectroscopy of W-Ta alloys, exposed to high-flux deuterium plasma

TitleThermal desorption spectroscopy of W-Ta alloys, exposed to high-flux deuterium plasma
Publication TypeJournal Article
Year of Publication2011
AuthorsY. Zayachuk, M Hoen, I. Uytdenhouwen, G. Van Oost
JournalPhysica Scripta
VolumeT145
Pagination014041
Date PublishedDec
Type of ArticleArticle; Proceedings Paper
ISBN Number0031-8949
KeywordsIRRADIATED TUNGSTEN, RETENTION, surface
Abstract

Thermal desorption spectroscopy (TDS) of W-1% Ta and W-5% Ta alloys exposed to a high-flux deuterium plasma (similar to 10(24) m(-2) s(-1)) has been performed. The single peak of the TDS spectra suggests the presence of only one type of trap in these alloys. Simulations using the diffusion code TMAP7 demonstrated that the trapping energies are in the range 0.89-0.96 eV, which suggests the trapping on vacancies as a predominant trapping mechanism in W-Ta alloys. The flux dependence of deuterium retention in W-Ta alloys was determined in the flux range 10(21)-10(24) m(-2) s(-1), with retention decreasing significantly for higher fluxes (while the fluence is kept constant). The obtained data demonstrate that W-Ta alloy does not exhibit blistering under the investigated conditions.

DOI10.1088/0031-8949/2011/T145/014041
Division

PSI

PID

c23ef86aa9ce66b298a940bd8f3f0b8f

Alternate TitlePhys. Scr.

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