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Co-deposited layers...
Co-deposited layers on gap surfaces of bulk tungsten divertor tiles in JET ITER-like wall: Directional effects and nanostructures
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- Tokitani, Masayuki (författare)
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan, Gifu
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- Miyamoto, Mitsutaka (författare)
- Shimane University, Matsue, Shimane 690-8504, Japan, Shimane
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- Masuzaki, Suguru (författare)
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan, Gifu
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- Hatano, Yuji (författare)
- University of Toyama, Toyama 930-8555, Japan
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- Lee, Sun Eui (författare)
- University of Toyama, Toyama 930-8555, Japan
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- Oya, Yasuhisa (författare)
- Shizuoka University, Shizuoka 422-8529, Japan
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- Kurotaki, Hironori (författare)
- QST, Rokkasho Aomori 039-3212, Japan
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- Asakura, Nobuyuki (författare)
- QST, Rokkasho Aomori 039-3212, Japan
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- Nakamura, Hirofumi (författare)
- QST, Rokkasho Aomori 039-3212, Japan
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- Hayashi, Takumi (författare)
- QST, Rokkasho Aomori 039-3212, Japan
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- Rubel, Marek (författare)
- KTH,Elektromagnetism och fusionsfysik,Uppsala University, Uppsala SE-751 20, Sweden
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- Widdowson, Anna (författare)
- Culham Centre for Fusion Energy, Culham Science Centre, Abingdon OX14 3DB, UK
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- Likonen, Jari (författare)
- VTT, Otakaari 3J, P.O. Box 1000, FIN-02044VTT, Finland, Otakaari 3J, P.O. Box 1000, FIN-02044VTT
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(creator_code:org_t)
- Elsevier BV, 2024
- 2024
- Engelska.
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Ingår i: Nuclear Materials and Energy. - : Elsevier BV. - 2352-1791. ; 39
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Co-deposited layers on surfaces of bulk tungsten divertor tiles (W lamellae) from the first campaign of JET with the ITER-Like Wall (JET-ILW, 2011–2012) were examined by means of a cross-sectional transmission electron microscope observation. The focus was on geometrical effects in impurity deposition, mainly beryllium (Be), on surfaces located in the poloidal gap separating adjacent lamellae. The study was carried out on the sides (gap surfaces) of two W lamellae from Stack C (located on the outboard part of the horizontal section of the lower divertor), from the region most exposed to the plasma (lamella C23) and in the magnetic shadow of the upstream divertor module (lamella C3). The tile manufacturing process (cold rolling) left shallow grooves, i.e. structures classified as convex (hill) and concave (valley) regions. These regions are decisive for the deposition structure. The main results were: (i) two kinds of impurity deposition features, “homogeneous” and “directional”, have been distinguished; (ii) the directional ones were characterized by nanoscale inclined vertical stripes in the deposition layer; (iii) homogeneous deposition without directional features were in the valley region. The results clearly indicate the impact of the surface finish, even in the tile gaps, on the qualitative and quantitative aspects of deposition.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- Deposition layer
- Dust
- Fuel retention
- Tungsten divertor
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Tokitani, Masayu ...
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Miyamoto, Mitsut ...
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Masuzaki, Suguru
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Hatano, Yuji
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Lee, Sun Eui
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Oya, Yasuhisa
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visa fler...
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Kurotaki, Hirono ...
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Asakura, Nobuyuk ...
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Nakamura, Hirofu ...
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Hayashi, Takumi
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Rubel, Marek
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Widdowson, Anna
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Likonen, Jari
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