Global migration of 13C impurities in high-density L-mode plasmas in ASDEX Upgrade

Antti Hakola (Corresponding Author), Seppo Koivuranta, Jari Likonen, M. Groth, T. Kurki-Suonio, V. Lindholm, J. Miettunen, K. Krieger, M. Mayer, H.W. Müller, R. Neu, V. Rohde, P. Petersson, ASDEX Upgrade Team

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Abstract

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.
Original languageEnglish
Pages (from-to)S694-S697
Number of pages4
JournalJournal of Nuclear Materials
Volume438
Issue numberSupplement
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed
Event20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Aachen, Aachen, Germany
Duration: 21 May 201225 May 2012

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Impurities
Plasmas
impurities
Facings
tiles
Tile
profiles
vessels
Carbon
chambers
Experiments
injection
Atoms
carbon
atoms

Cite this

Hakola, Antti ; Koivuranta, Seppo ; Likonen, Jari ; Groth, M. ; Kurki-Suonio, T. ; Lindholm, V. ; Miettunen, J. ; Krieger, K. ; Mayer, M. ; Müller, H.W. ; Neu, R. ; Rohde, V. ; Petersson, P. ; ASDEX Upgrade Team. / Global migration of 13C impurities in high-density L-mode plasmas in ASDEX Upgrade. In: Journal of Nuclear Materials. 2013 ; Vol. 438, No. Supplement. pp. S694-S697.
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abstract = "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.",
author = "Antti Hakola and Seppo Koivuranta and Jari Likonen and M. Groth and T. Kurki-Suonio and V. Lindholm and J. Miettunen and K. Krieger and M. Mayer and H.W. M{\"u}ller and R. Neu and V. Rohde and P. Petersson and {ASDEX Upgrade Team}",
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Hakola, A, Koivuranta, S, Likonen, J, Groth, M, Kurki-Suonio, T, Lindholm, V, Miettunen, J, Krieger, K, Mayer, M, Müller, HW, Neu, R, Rohde, V, Petersson, P & ASDEX Upgrade Team 2013, 'Global migration of 13C impurities in high-density L-mode plasmas in ASDEX Upgrade', Journal of Nuclear Materials, vol. 438, no. Supplement, pp. S694-S697. https://doi.org/10.1016/j.jnucmat.2013.01.147

Global migration of 13C impurities in high-density L-mode plasmas in ASDEX Upgrade. / Hakola, Antti (Corresponding Author); Koivuranta, Seppo; Likonen, Jari; Groth, M.; Kurki-Suonio, T.; Lindholm, V.; Miettunen, J.; Krieger, K.; Mayer, M.; Müller, H.W.; Neu, R.; Rohde, V.; Petersson, P.; ASDEX Upgrade Team.

In: Journal of Nuclear Materials, Vol. 438, No. Supplement, 2013, p. S694-S697.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Global migration of 13C impurities in high-density L-mode plasmas in ASDEX Upgrade

AU - Hakola, Antti

AU - Koivuranta, Seppo

AU - Likonen, Jari

AU - Groth, M.

AU - Kurki-Suonio, T.

AU - Lindholm, V.

AU - Miettunen, J.

AU - Krieger, K.

AU - Mayer, M.

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AU - Neu, R.

AU - Rohde, V.

AU - Petersson, P.

AU - ASDEX Upgrade Team

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AB - 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.

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