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Global migration of C-13 impurities in high-density L-mode plasmas in ASDEX Upgrade
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2013 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 438, no Suppl., S694-S697 p.Article in journal (Refereed) Published
Abstract [en]

We have studied the migration of 13C in ASDEX Upgrade after a global impurity injection experiment in 2011. The main chamber was observed to be the largest deposition region for carbon: almost 35% of the injected atoms end up there. Moreover, gaps between wall tiles account for surface densities which are comparable to those on the plasma-facing surfaces. SOLPS modeling of the experiment produced a set of background plasmas and poloidal flow profiles for simulating the transport of 13C with ASCOT; a match with measured deposition, however, required using an imposed flow profile. ASCOT reproduced the observed localized deposition at the outer midplane but work is needed to explain the measured deposition at the inner side of the torus and at the top of the vessel.

Place, publisher, year, edition, pages
2013. Vol. 438, no Suppl., S694-S697 p.
Keyword [en]
ASDEX upgrade, Flow profile, Impurities in, L-mode plasmas, Plasma-facing surface, Poloidal flow, Surface density, Wall tiles, Deposition, Experiments, Impurities, Plasma simulation
National Category
Fusion, Plasma and Space Physics
URN: urn:nbn:se:kth:diva-140102DOI: 10.1016/j.jnucmat.2013.01.147ISI: 000330795300146ScopusID: 2-s2.0-84885474664OAI: diva2:688574
20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices (PSI), Forschungszentrum Julich, Aachen, Germany, May 21-25, 2012

QC 20140117

Available from: 2014-01-17 Created: 2014-01-17 Last updated: 2014-03-06Bibliographically approved

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