Long-term fuel retention and release in JET ITER-Like Wall at ITER-relevant baking temperatures

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dc.contributor.author Heinola, K.
dc.contributor.author Likonen, J.
dc.contributor.author Ahlgren, T.
dc.contributor.author Brezinsek, S.
dc.contributor.author De Temmerman, G.
dc.contributor.author Jepu, I.
dc.contributor.author Matthews, G. F.
dc.contributor.author Pitts, R. A.
dc.contributor.author Widdowson, A.
dc.contributor.author JET Contributors
dc.date.accessioned 2017-08-22T15:03:00Z
dc.date.available 2017-08-22T15:03:00Z
dc.date.issued 2017-08
dc.identifier.citation Heinola , K , Likonen , J , Ahlgren , T , Brezinsek , S , De Temmerman , G , Jepu , I , Matthews , G F , Pitts , R A , Widdowson , A & JET Contributors 2017 , ' Long-term fuel retention and release in JET ITER-Like Wall at ITER-relevant baking temperatures ' , Nuclear Fusion , vol. 57 , no. 8 , 086024 . https://doi.org/10.1088/1741-4326/aa747e
dc.identifier.other PURE: 88252740
dc.identifier.other PURE UUID: 9209a3a4-8c87-48f3-83e8-6c6c9de7541b
dc.identifier.other WOS: 000404721100002
dc.identifier.other Scopus: 85019442362
dc.identifier.other ORCID: /0000-0002-0601-8274/work/42616086
dc.identifier.other ORCID: /0000-0002-0213-7305/work/39203948
dc.identifier.uri http://hdl.handle.net/10138/214441
dc.description.abstract The fuel outgassing efficiency from plasma-facing components exposed in JET-ILW has been studied at ITER-relevant baking temperatures. Samples retrieved from the W divertor and Be main chamber were annealed at 350 and 240 degrees C, respectively. Annealing was performed with thermal desoprtion spectrometry (TDS) for 0, 5 and 15 h to study the deuterium removal effectiveness at the nominal baking temperatures. The remained fraction was determined by emptying the samples fully of deuterium by heating W and Be samples up to 1000 and 775 degrees C, respectively. Results showed the deposits in the divertor having an increasing effect to the remaining retention at temperatures above baking. Highest remaining fractions 54 and 87% were observed with deposit thicknesses of 10 and 40 mu m, respectively. Substantially high fractions were obtained in the main chamber samples from the deposit-free erosion zone of the limiter midplane, in which the dominant fuel retention mechanism is via implantation: 15 h annealing resulted in retained deuterium higher than 90%. TDS results from the divertor were simulated with TMAP7 calculations. The spectra were modelled with three deuterium activation energies resulting in good agreement with the experiments. en
dc.format.extent 6
dc.language.iso eng
dc.relation.ispartof Nuclear Fusion
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject fuel retention
dc.subject ITER
dc.subject deposition
dc.subject divertor
dc.subject main chamber
dc.subject JET-ILW
dc.subject 114 Physical sciences
dc.title Long-term fuel retention and release in JET ITER-Like Wall at ITER-relevant baking temperatures en
dc.type Article
dc.contributor.organization Department of Physics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1088/1741-4326/aa747e
dc.relation.issn 0029-5515
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion

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