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COMPASS-U plasma-facing components: Towards a full W first wall coverage
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SYSNO ASEP 0617644 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title COMPASS-U plasma-facing components: Towards a full W first wall coverage Author(s) Dejarnac, Renaud (UFP-V) RID, ORCID
Ďurovec, Mikuláš (UFP-V)
Chappuis, P. (FR)
Šesták, David (UFP-V) RID
Čaloud, Jakub (UFP-V)
Matějíček, Jiří (UFP-V) RID, ORCID
Gerardin, Jonathan (UFP-V) ORCID
Dimitrova, Miglena (UFP-V) ORCID
Havlíček, Josef (UFP-V) RID, ORCID
Hromádka, Jakub (UFP-V)
Paglini, Alessandro (UFP-V)
Patočka, Karel (UFP-V)
Peterka, Matěj (UFP-V) RID, ORCID
Rejent, Marek (UFP-V)
Vondráček, Petr (UFP-V) RID, ORCIDNumber of authors 15 Article number 114815 Source Title Fusion Engineering and Design. - : Elsevier - ISSN 0920-3796
Roč. 211, February (2025)Number of pages 7 s. Language eng - English Country NL - Netherlands Keywords Coating ; COMPASS Upgrade ; Plasma-facing components ; Tokamak ; Tungsten Subject RIV JF - Nuclear Energetics OECD category Nuclear physics R&D Projects EF16_019/0000768 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2023045 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 001421177700001 EID SCOPUS 85215848220 DOI https://doi.org/10.1016/j.fusengdes.2025.114815 Annotation This paper describes the plasma-facing components of tokamak COMPASS-U and how a 100 % tungsten coverage of plasma-wall interaction areas is achieved with passively cooled, bulk tungsten tiles in high heat flux regions and W-coated Inconel 718 tiles elsewhere. The choice of Inconel 718 was motivated by the future foreseen plasma operation up to 500 °C as Inconel 718 still keeps high mechanical properties up to 700 °C. In order to prevent the physical sputtering of the different elements that compose this Ni-based superalloy, a thin tungsten coating is applied by physical vapor deposition. COMPASS-U plasma-facing components consist of 1) tungsten tiles: in a closed divertor at the bottom of the machine and on 8 inner & 2 outer guard limiters to start/end plasma discharges (inner) and to cope with runaway electrons (inner & outer), and 2) W-coated tiles: on the inner wall (the tiles are slightly recessed between the inner guard limiters and cover the entire central column), on 8 discrete outer wall limiters, on the two in-vessel stabilizing coils, and finally on the temporary initial open divertor located at the top of the vacuum vessel. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2025 Electronic address https://www.sciencedirect.com/science/article/pii/S0920379625000195?via%3Dihub
Number of the records: 1