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Studies of dust from JET with the ITER-Like Wall: Composition and internal structure
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
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Number of Authors: 11122017 (English)In: Nuclear Materials and Energy, E-ISSN 2352-1791, Vol. 12, p. 582-587Article in journal (Refereed) Published
Abstract [en]

Results are presented for the dust survey performed at JET after the second experimental campaign with the ITER-Like Wall: 2013-2014. Samples were collected on adhesive stickers from several different positions in the divertor both on the tiles and on the divertor carrier. Brittle dust-forming deposits on test mirrors from the inner divertor wall were also studied. Comprehensive characterization accomplished by a wide range of high-resolution microscopy techniques, including focused ion beam, has led to the identification of several classes of particles: (i) beryllium flakes originating either from the Be coatings from the inner wall cladding or Be-rich mixed co-deposits resulting from material migration; (ii) beryllium droplets and splashes; (iii) tungsten and nickel-rich (from Inconel) droplets; (iv) mixed material layers with a various content of small (8-200 nm) W-Mo and Ni-based debris. A significant content of nitrogen from plasma edge cooling has been identified in all types of co-deposits. A comparison between particles collected after the first and second experimental campaign is also presented and discussed. (C) 2016 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. 582-587
Keywords [en]
Dust, JET, ITER-Like Wall, Beryllium, Tungsten, Material mixing
National Category
Subatomic Physics Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:uu:diva-398924DOI: 10.1016/j.nme.2016.11.027ISI: 000417293300092OAI: oai:DiVA.org:uu-398924DiVA, id: diva2:1379116
Note

For complete list of authors see http://dx.doi.org/10.1016/j.nme.2016.11.027

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

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