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Microscopically nonuniform deposition and deuterium retention in the divertor in JET with ITER-like wall
KTH, Skolan för elektro- och systemteknik (EES), Fusionsplasmafysik.
KTH, Skolan för elektro- och systemteknik (EES), Fusionsplasmafysik.
KTH, Skolan för elektro- och systemteknik (EES), Fusionsplasmafysik.
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2015 (engelsk)Inngår i: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 463, s. 956-960Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The divertor surfaces in JET with ITER-like wall (ILW) have been studied using micro ion beam analysis (mu-IBA) methods and scanning electron microscopy (SEM). Deposited layers with beryllium as main constituent had been formed during plasma operations through 2011-2012. The deuterium trapping and impurity deposition were non-uniform, frequently enhanced within pits, cracks and valleys, regions reaching in size from 10 mu m to 200 mu m. The impurity deposition and fuel retention were correlated with the surface slope with respect to the direction of ion incidence. Typically more than 70% of the total measured areal density of trapped D was found in less than 30% of the surface area. This is of consequence for the interpretation of other surface analyses and in extrapolation from fuel retention in JET with ITER-like wall and rough divertor surfaces to ITER with smoother surfaces.

sted, utgiver, år, opplag, sider
2015. Vol. 463, s. 956-960
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URN: urn:nbn:se:kth:diva-172699DOI: 10.1016/j.jnucmat.2014.12.015ISI: 000358467200206Scopus ID: 2-s2.0-84937641892OAI: oai:DiVA.org:kth-172699DiVA, id: diva2:850062
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QC 20150831

Tilgjengelig fra: 2015-08-31 Laget: 2015-08-27 Sist oppdatert: 2017-12-04bibliografisk kontrollert

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Bergsåker, HenrikBykov, IgorPetersson, Per
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