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

Antti Hakola; Seppo Koivuranta; Jari Likonen; A. Herrmann; H. Maier; M. Mayer; R. Neu; V. Rohde; ASDEX Upgrade Team

doi:10.1016/j.jnucmat.2014.11.034

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

Antti Hakola^*, Seppo Koivuranta, Jari Likonen, A. Herrmann, H. Maier, M. Mayer, R. Neu, V. Rohde, ASDEX Upgrade Team

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

13 Citations (Scopus)

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 language	English
Pages (from-to)	162-165
Journal	Journal of Nuclear Materials
Volume	463
DOIs	https://doi.org/10.1016/j.jnucmat.2014.11.034
Publication status	Published - 2015
MoE publication type	A1 Journal article-refereed

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title = "Erosion of tungsten and steel in the main chamber of ASDEX Upgrade",

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.",

author = "Antti Hakola and Seppo Koivuranta and Jari Likonen and A. Herrmann and H. Maier and M. Mayer and R. Neu and V. Rohde and \{ASDEX Upgrade Team\}",

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journal = "Journal of Nuclear Materials",

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

AU - Hakola, Antti

AU - Koivuranta, Seppo

AU - Likonen, Jari

AU - Herrmann, A.

AU - Maier, H.

AU - Mayer, M.

AU - Neu, R.

AU - Rohde, V.

AU - ASDEX Upgrade Team

PY - 2015

Y1 - 2015

N2 - 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.

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.

U2 - 10.1016/j.jnucmat.2014.11.034

DO - 10.1016/j.jnucmat.2014.11.034

M3 - Article

SN - 0022-3115

VL - 463

SP - 162

EP - 165

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

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

Abstract

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