0617644 - ÚFP 2025 RIV NL eng J - Článek v odborném periodiku
Dejarnac, Renaud - Ďurovec, Mikuláš - Chappuis, P. - Šesták, David - Čaloud, Jakub - Matějíček, Jiří - Gerardin, Jonathan - Dimitrova, Miglena - Havlíček, Josef - Hromádka, Jakub - Paglini, Alessandro - Patočka, Karel - Peterka, Matěj - Rejent, Marek - Vondráček, Petr
COMPASS-U plasma-facing components: Towards a full W first wall coverage.
Fusion Engineering and Design. Roč. 211, February (2025), č. článku 114815. ISSN 0920-3796. E-ISSN 1873-7196
Grant CEP: GA MŠMT(CZ) EF16_019/0000768; GA MŠMT(CZ) LM2023045
Institucionální podpora: RVO:61389021
Klíčová slova: Coating * COMPASS Upgrade * Plasma-facing components * Tokamak * Tungsten
Obor OECD: Nuclear physics
Impakt faktor: 1.9, rok: 2023 ; AIS: 0.316, rok: 2023
Způsob publikování: Omezený přístup
Web výsledku:
https://www.sciencedirect.com/science/article/pii/S0920379625000195?via%3DihubDOI: https://doi.org/10.1016/j.fusengdes.2025.114815

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.
Trvalý link: https://hdl.handle.net/11104/0364551