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Deuterium retention in the divertor tiles of JET ITER-Like wall
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
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Number of Authors: 11152017 (English)In: Nuclear Materials and Energy, E-ISSN 2352-1791, Vol. 12, p. 655-661Article in journal (Refereed) Published
Abstract [en]

Divertor tiles removed after the second JET ITER-Like Wall campaign 2013-2014 (ILW-2) were studied using Secondary Ion Mass Spectrometry (SIMS). Measurements show that the thickest beryllium (Be) dominated deposition layers are located at the upper part of the inner divertor and are up to similar to 40 mu m thick at the lower part of Tile 0 exposed in 2011-2014. The highest deuterium (D) amounts (>8 . 10 18 at./cm(2)), in contrast, were found on the upper part of Tile 1 (2013-2014), where the Be deposits are similar to 10 mu m thick. D was mainly retained in the near-surface layer of the Be deposits but also deeper in tungsten (W) and molybdenum (Mo) layers of the marker coated tiles, especially at W-Mo layer interfaces. D retention for the ILW-2 divertor tiles is higher than for the first campaign 2011-2012 (ILW-1) and probable reasons for the difference are that SIMS measurements for the ILW-2 samples were done deeper than for the ILW-1 samples, some of the tiles were exposed during both ILW-1 and ILW-2 and therefore had a longer exposure time, and the differences between ILW-1 and ILW-2 campaigns e.g. in strike point distributions and injected powers. (C) 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.

Place, publisher, year, edition, pages
ELSEVIER , 2017. Vol. 12, p. 655-661
Keywords [en]
JET, Fuel retention, Erosion, Deposition
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:uu:diva-398925DOI: 10.1016/j.nme.2017.04.007ISI: 000417293300105OAI: oai:DiVA.org:uu-398925DiVA, id: diva2:1379026
Note

For complete list of authors see http://dx.doi.org/10.1016/j.nme.2017.04.007

Available from: 2019-12-16 Created: 2019-12-16 Last updated: 2019-12-16Bibliographically approved

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Andersson Sundén, ErikCecconello, MarcoConroy, SeanEricsson, GöranEriksson, JacobHjalmarsson, AndersPossnert, GöranSjöstrand, HenrikWeiszflog, Matthias
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