Erosion of tungsten and steel in the main chamber of ASDEX Upgrade

A. Hakola (Corresponding Author), S. Koivuranta, S. Likonen, A. Herrmann, H. Maier, M. Mayer, R. Neu, V. Rohde, ASDEX Upgrade Team

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

We have investigated net erosion and deposition of W and P92 steel in ASDEX Upgrade during its full-W operational phase. The outer divertor and the outer midplane are the strongest net erosion region for W, with rates up to 0.12 nm/s and 0.05 nm/s, respectively. The eroded W is transported via the scrape-off layer plasma and predominantly deposited in the upper (20-30%) and inner divertors (40-60%). The inner midplane does not contribute significantly to the erosion-deposition balance such that the remaining W is deposited in shadowed areas of the tokamak. Steel is eroded 3-10 times faster than W but could be used at the top and inner parts of the main chamber where the erosion rate is 0.01 nm/s.
Original languageEnglish
Pages (from-to)162-165
JournalJournal of Nuclear Materials
Volume463
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

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Tungsten
Steel
erosion
Erosion
tungsten
chambers
steels
plasma layers
Plasmas

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Hakola, A. ; Koivuranta, S. ; Likonen, S. ; Herrmann, A. ; Maier, H. ; Mayer, M. ; Neu, R. ; Rohde, V. ; Team, ASDEX Upgrade. / Erosion of tungsten and steel in the main chamber of ASDEX Upgrade. In: Journal of Nuclear Materials. 2015 ; Vol. 463. pp. 162-165.
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Erosion of tungsten and steel in the main chamber of ASDEX Upgrade. / Hakola, A. (Corresponding Author); Koivuranta, S.; Likonen, S.; Herrmann, A.; Maier, H.; Mayer, M.; Neu, R.; Rohde, V.; Team, ASDEX Upgrade.

In: Journal of Nuclear Materials, Vol. 463, 2015, p. 162-165.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Erosion of tungsten and steel in the main chamber of ASDEX Upgrade

AU - Hakola, A.

AU - Koivuranta, S.

AU - Likonen, S.

AU - Herrmann, A.

AU - Maier, H.

AU - Mayer, M.

AU - Neu, R.

AU - Rohde, V.

AU - Team, ASDEX Upgrade

PY - 2015

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AB - We have investigated net erosion and deposition of W and P92 steel in ASDEX Upgrade during its full-W operational phase. The outer divertor and the outer midplane are the strongest net erosion region for W, with rates up to 0.12 nm/s and 0.05 nm/s, respectively. The eroded W is transported via the scrape-off layer plasma and predominantly deposited in the upper (20-30%) and inner divertors (40-60%). The inner midplane does not contribute significantly to the erosion-deposition balance such that the remaining W is deposited in shadowed areas of the tokamak. Steel is eroded 3-10 times faster than W but could be used at the top and inner parts of the main chamber where the erosion rate is 0.01 nm/s.

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DO - 10.1016/j.jnucmat.2014.11.034

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EP - 165

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

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