Microstructure and Retention in He-W Co-Deposition Layer

Microstructure and Retention in He-W Co-Deposition Layer

A tungsten (W) deposition layer is formed while a sample is exposed to a helium (He) plasma at the surface temperature of 473 or 573 K. The formed He-W co-deposition layer was composed of fine grains, the size of which increased with the surface temperature. The samples with the co-deposition layer...

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Veröffentlicht in:Plasma and Fusion Research 2020/02/17, Vol.15, pp.1201004-1201004
Hauptverfasser: ASAI, Kosuke, YOSHIDA, Naoaki, OHNO, Noriyasu, KAJITA, Shin, TANAKA, Hirohiko, YAJIMA, Miyuki, NAGATA, Daisuke
Format: Artikel
Sprache:eng
Schlagworte:
Co-NAGDIS
Codeposition
Deuterium
He-W co-deposition
Helium
plasma-material interactions
Surface temperature
Thermal desorption spectroscopy
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Beschreibung
Zusammenfassung:A tungsten (W) deposition layer is formed while a sample is exposed to a helium (He) plasma at the surface temperature of 473 or 573 K. The formed He-W co-deposition layer was composed of fine grains, the size of which increased with the surface temperature. The samples with the co-deposition layer was exposed to a deuterium (D2) plasma, and the D retention was investigated using thermal desorption spectroscopy. It was found that the co-deposition layer has quite different D retention characteristics compared with bulk W.
ISSN:1880-6821
1880-6821
DOI:10.1585/pfr.15.1201004