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Dust remobilization experiments on the COMPASS tokamak
KTH, School of Electrical Engineering (EES), Space and Plasma Physics.ORCID iD: 0000-0002-6712-3625
KTH, School of Electrical Engineering (EES), Space and Plasma Physics.ORCID iD: 0000-0001-9632-8104
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2017 (English)In: Fusion engineering and design, ISSN 0920-3796, E-ISSN 1873-7196, Vol. 124, p. 446-449Article in journal (Refereed) Published
Abstract [en]

Dust remobilization is one of the not yet fully understood mechanisms connected to the prompt erosion of material from plasma facing surfaces in fusion devices. As a part of a newly initiated cross-machine study, dust remobilization experiments have been performed on the COMPASS tokamak. Tungsten samples with well-defined deposited tungsten dust grains, prepared using a recently developed controlled pre-adhesion method, have been exposed to ELMy H-mode discharges as well as L-mode discharges with forced disruptions. Here we report on the technical aspects of the experiment realization as well as on the experimental results of dust remobilization. The latter is discussed in the light of data from other machines and a physical interpretation is suggested for the observed spatial localization of the dust remobilization activity. Evidence of rearrangement of isolated dust into clusters and strings is also presented.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2017. Vol. 124, p. 446-449
Keywords [en]
Dust remobilization, Tungsten, Disruption, ELM, Plasma, Tokamak
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-221892DOI: 10.1016/j.fusengdes.2017.01.044ISI: 000419411900094Scopus ID: 2-s2.0-85011342779OAI: oai:DiVA.org:kth-221892DiVA, id: diva2:1179239
Conference
29th Symposium on Fusion Technology (SOFT), SEP 05-09, 2016, Prague, CZECH REPUBLIC
Note

QC 20180131

Available from: 2018-01-31 Created: 2018-01-31 Last updated: 2018-01-31Bibliographically approved

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Ratynskaia, Svetlana V.Tolias, Panagiotis

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