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Studies of dust from JET with the ITER-Like Wall: Composition and internal structure
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0001-9901-6296
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0001-5603-8559
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2017 (English)In: NUCLEAR MATERIALS AND ENERGY, 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.

Place, publisher, year, edition, pages
2017. Vol. 12, p. 582-587
National Category
Fusion, Plasma and Space Physics
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URN: urn:nbn:se:kth:diva-220644DOI: 10.1016/j.nme.2016.11.027ISI: 000417293300092Scopus ID: 2-s2.0-85010977239OAI: oai:DiVA.org:kth-220644DiVA, id: diva2:1169679
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QC 20171229

Available from: 2017-12-29 Created: 2017-12-29 Last updated: 2018-03-13Bibliographically approved

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Rubel, MarekGarcia Carrasco, Alvaro

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