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Fine metal dust particles on the wall probes from JET-ILW
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0001-9901-6296
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2017 (English)In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. T170, article id 014038Article in journal (Refereed) Published
Abstract [en]

Collection and ex situ studies of dust generated in controlled fusion devices during plasma operation are regularly carried out after experimental campaigns. Herewith results of the dust survey performed in JET after the second phase of operation with the metal ITER-like wall (2013-2014) are presented. For the first-time-ever particles deposited on silicon plates acting as dust collectors installed in the inner and outer divertor have been examined. The emphasis is on analysing metal particles (Be and W) with the aim to determine their composition, size and surface topography. The most important is the identification of beryllium dust in the form of droplets (both splashes and spherical particles), flakes of co-deposits and small fragments of Be tiles. Tungsten and nickel rich (from Inconel) particles are also identified. Nitrogen from plasma edge cooling has been detected in all types of particles. They are categorized and the origin of various constituents is discussed.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2017. Vol. T170, article id 014038
Keywords [en]
plasma, dust, JET tokamak, ITER-like wall, beryllium, tungsten
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-217721DOI: 10.1088/1402-4896/aa8ddfISI: 000414120500038OAI: oai:DiVA.org:kth-217721DiVA, id: diva2:1159623
Conference
16th International Conference on Plasma-Facing Materials and Components for Fusion Applications, MAY 16-19, 2017, GERMANY
Note

QC 20171123

Available from: 2017-11-23 Created: 2017-11-23 Last updated: 2017-11-23Bibliographically approved

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Rubel, MarekPetersson, Per

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