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

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

11 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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10.1016/j.jnucmat.2014.11.034

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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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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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