EFDA-JET-CP(11)06/01

Real-Time Protection of the "ITER-Like Wall at JET"

During the last JET tokamak shutdown a new ITER-Like Wall has been installed using Tungsten and Beryllium materials. To ensure Plasma Facing Component (PFC) integrity, the real-time protection of the wall has been upgraded through the project "Protection for the ITER-like Wall" (PIW). 13 CCD robust analogue cameras view the main areas of plasma wall interaction and Regions Of Interest (ROI) are used for monitoring in real time the surface temperature of the PFCs. For each camera, ROIs will be set up pre-pulse and, during plasma operation, surface temperatures from these ROIs will be sent to the real time processing system for monitoring and preventing damages on PFCs by modifying the plasma parameters. Since 2005 a real time safety system for the monitoring of the PFCs is routinely used on the tokamak Tore Supra. Based on this successful experience, a similar video and associated control system has been implemented at JET for the PIW. The overall system and the first results are presented in this paper.
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EFDC110601 730.64 Kb