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In order to achieve long pulse high performance plasma discharges, actively cooled plasma facing components (PFCs) have been installed since the beginning of Tore Supra in 1988. So far, up to 280 MJ of energy could be removed within a single discharge of 2mn duration. Active cooling creates a specific environment, like, e.g. constant low wall temperature (lower than 200 degrees Celsius) or the presence of water pipes close to the plasma boundary, as compared to inertly cooled devices. Physical processes, specific of the actively cooled environment occur, which may sometimes induce irreversible damage that would not even have been observed on conventional PFCs. After a short description of the development status of the actively cooled PFCs program at Tore Supra, the paper concentrates on those aspects where physics and design aspects are mixed, which deserve thorough analysis for the conception of a next step fusion device environment.

Additional information

Authors: CHATELIER M, CEA, Cadarache, Saint-Paul-lez-Durance (FR);TORE SUPRA TEAM, CEA, Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An article published in: Physics of Plasma, Vol.8, No.5 (2001), pp.2148-2152
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