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Long pulse operation imposes severe constraints on plasma facing components. Tore Supra pioneers this operation mode, with a large area high heat flux limiter technologically representative of next step experiments divertor targets. The failure mode of the individual elements are described, along with the strategies employed to reduce the occurrence of accidents. Two are developed the knowledge of the heat flux in the scrape off layer and particularly the ability to predict the power density on the components surface, and the feed back control of edge diagnostics. Emphasis is set on infrared thermography, which delivers 2D+time data, particularly useful for the prevention of accidents. This diagnostic is sensible to the growth of carbonaceous deposits, which are highly non-uniform in Tore Supra as is presented in the paper.

Additional information

Authors: MITTEAU R, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An oral paper given at: 16th Int. Conf. on Plasma Surface Interaction in controlled Fusion Devices Organised by: Massachusetts Institute of Technology, Plasma Science & Fusion Center, Cambridge (US) Held at: Holiday Inn By The Bay, Portla
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail:
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