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Dust investigations in TEXTOR: Impact of dust on plasma-wall interactions and on plasma performance
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2013 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 438, no Suppl., S126-S132 p.Article in journal (Refereed) Published
Abstract [en]

Dust will have severe impact on ITER performance since the accumulation of tritium in dust represents a safety issue, a possible reaction of dust with air and steam imposes an explosion hazard and the penetration of dust in core plasmas may degrade plasma performance by increasing radiative losses. Investigations were performed in TEXTOR where known amounts of pre-characterized carbon, diamond and tungsten dust were mobilized into plasmas using special dust holders. Mobilization of dust changed a balance between plasma-surface interactions processes, significantly increasing net deposition. Immediately after launch dust was dominating both core and edge plasma parameters. Remarkably, in about 100 ms after the launch, the effect of dust on edge and core plasma parameters was vanished: no increase of carbon and tungsten concentrations in the core plasmas was detected suggesting a prompt transport of dust to the nearby plasma-facing components without further residence in the plasma.

Place, publisher, year, edition, pages
2013. Vol. 438, no Suppl., S126-S132 p.
Keyword [en]
Explosion hazards, Plasma performance, Plasma wall interaction, Plasma-facing components, Plasma-surface interactions, Radiative loss, Tungsten concentrations, Tungsten dusts, Carbon, Plasma devices, Plasma interactions, Plasma turbulence, Tungsten, Dust
National Category
Fusion, Plasma and Space Physics
URN: urn:nbn:se:kth:diva-140098DOI: 10.1016/j.jnucmat.2013.01.020ISI: 000330795300020ScopusID: 2-s2.0-84885471939OAI: diva2:688691
20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices (PSI), Forschungszentrum Julich, Aachen, Germany, May 21-25, 2012

QC 20140310

Available from: 2014-01-17 Created: 2014-01-17 Last updated: 2014-03-10Bibliographically approved

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Ratynskaia, SvetlanaBergsåker, HenrikBykov, Igor
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ReferencesLink to record
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