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An overview of fuel retention and morphology in a castellated tungsten limiter
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics. KTH, School of Electrical Engineering (EES), Centres, Alfvén Laboratory Centre for Space and Fusion Plasma Physics.ORCID iD: 0000-0001-9901-6296
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2008 (English)In: Fusion engineering and design, ISSN 0920-3796, E-ISSN 1873-7196, Vol. 83, no 7-9, 1049-1053 p.Article in journal (Refereed) Published
Abstract [en]

A castellated tungsten test limiter composed of detachable segments was exposed to plasma discharges in the TEXTOR to kamak operated with graphite main limiters. Dismantling of the limiter enabled the analysis Of Surfaces located inside the castellation, The emphasis was on the determination of: (i) deposition and fuel retention; (ii) material mixing and new Compound formation on plasma-facing Surfaces and in the grooves of castellation. The investigation performed by means of accelerator-based ion beam analysis methods, microscopy and X-ray diffraction has brought several essential results: (i) deuterium retention oil plasma-facing Surfaces and in the castellation of metal PFC is strongly related to the co-deposition with carbon; (ii) both carbon and deuterium are detected only in narrow belts, a few millimetre broad, clown the gap with the decay length of around 1.2-1.8 mm; (iii) the presence of copper droplets and tungsten oxide (WO(2)) has been identified in the gaps. Different pathways leading to the oxide formation are considered.

Place, publisher, year, edition, pages
2008. Vol. 83, no 7-9, 1049-1053 p.
Keyword [en]
Tungsten, Co-deposition, Plasma-facing components, Fuel inventory, Castellation, TEXTOR
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-38049DOI: 10.1016/j.fusengdes.2008.05.011ISI: 000262224100040Scopus ID: 2-s2.0-57049173168OAI: oai:DiVA.org:kth-38049DiVA: diva2:436597
Note
8th International Symposium on Fusion Nuclear Technology Location: Heidelberg, GERMANY Date: SEP 30-OCT 05, 2007 Available from: 2011-08-24 Created: 2011-08-22 Last updated: 2017-12-08Bibliographically approved

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Rubel, Marek J.

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