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Surface morphology of the bulk tungsten divertor tiles from JET ITER-like wall
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- Tokitani, M. (author)
- Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan.
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- Miyamoto, M. (author)
- Shimane Univ, Matsue, Shimane 6908504, Japan.
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- Masuzaki, S. (author)
- Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan.
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- Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan Shimane Univ, Matsue, Shimane 6908504, Japan. (creator_code:org_t)
- 2020-02-27
- 2020
- English.
- In: Physica Scripta. - : IOP PUBLISHING LTD. - 0031-8949 .- 1402-4896. ; T171:1
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Surface characterization of bulk tungsten tiles (W lamellae) used during the first campaign of JET with the ITER-Like Wall (JET-ILW) was performed by means of microscopy and tritium imaging techniques. This is the first report regarding very detailed structural studies of W lamellae from the JET-ILW divertor. A special feature of the W lamellae installed in JET is the intrinsic network of micro-cracks detected on surfaces of the as-manufactured material. Analyses of different W lamellae samples on the plasma-facing surface reveal two types of surface structures caused by plasma impact: areas with strong erosion and regions of mild plasma interaction. In regions of strong erosion, a thin modified layer (thickness of similar to 20 nm) with a high density of defects including bubble-like structures has been formed. In addition, features indicating melting along edges of micro-cracks with the micro-scale plastic deformation have been identified.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- JET-ILW
- bulk tungsten divertor
- erosion and deposition
- micro-scale plastic deformation
- tritium
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Tokitani, M.
- Miyamoto, M.
- Masuzaki, S.
- Hatano, Y.
- Lee, S. E.
- Oya, Y.
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- Otsuka, T.
- Oyaidzu, M.
- Kurotaki, H.
- Suzuki, T.
- Hamaguchi, D.
- Hayashi, T.
- Asakura, N.
- Widdowson, A.
- Jachmich, S.
- Rubel, Marek
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- About the subject
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- NATURAL SCIENCES
- NATURAL SCIENCES
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- Physica Scripta
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- Royal Institute of Technology
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