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Overview of comprehensive characterisation of erosion zones on plasma facing components
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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2006 (English)In: Fusion engineering and design, ISSN 0920-3796, E-ISSN 1873-7196, Vol. 81, no 1-7, 211-219 p.Article in journal (Refereed) Published
Abstract [en]

Morphology of carbon plasma facing components retrieved from the TEXTOR tokamak after long operation periods and exposure to total particle doses exceeding 7 x 10(26) m(-2) was determined. Emphasis was on the composition and structure of the erosion zones. Tiles from two limiters-the main toroidal belt pump ALT-II and auxiliary inner bumper-were examined using high-resolution microscopy, surface profilometry, ion beam analysis techniques and energy dispersive X-ray spectroscopy. The essence of results regarding the net-erosion zones is following: (i) microstructure of surfaces is significantly smoother than on a non-exposed graphite, whereas carbon fibre composites show similar appearance prior to the exposure and after; (ii) deuterium retention is 2-5 x 10(21) m(-2); (iii) the presence of plasma impurity atoms (e.g. metals) is detected predominantly in small cavities acting as local shadowed areas on the surface. The results are discussed in terms of processes of material erosion/re-deposition and tokamak operation conditions influencing the morphology of wall components.

Place, publisher, year, edition, pages
2006. Vol. 81, no 1-7, 211-219 p.
Keyword [en]
graphite, erosion, plasma facing components, fuel inventory, TEXTOR
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-25625DOI: 10.1016/j.fusengdes.2005.07.037ISI: 000235599500028Scopus ID: 2-s2.0-31844453010OAI: oai:DiVA.org:kth-25625DiVA: diva2:370501
Conference
7th International Symposium on Fusion Nuclear Technology Natl Museum Emerging Sci & Innovat, Tokyo, JAPAN, MAY 22-27, 2005
Note
QC 20101117 QC 20111003. Conference: 7th International Symposium on Fusion Nuclear Technology. Natl Museum Emerging Sci & Innovat, Tokyo, JAPAN. MAY 22-27, 2005 Available from: 2010-11-17 Created: 2010-10-27 Last updated: 2017-12-12Bibliographically approved

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Rubel, Marek J.

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