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This publication contains three papers on vacuum science and technology. The first paper discusses vacuum problems and first wall technologies in the FTU (Frascati Tokamak Upgrade) machine. The aim is to produce high density, high temperature plasmas with long energy confinement time to study reactor relevant regimes. How solutions were adopted in realising the vacuum chamber and vacuum system is explained. The second paper on plasma-limiter interactions in the FTU machine describes how in a tokamak with limiter-controlled discharges, a careful analysis of the thermal load to the limiter is necessary to optimize the choice of the surface shape and material to be used in forthcoming machines. The final paper concerns vacuum system and cleaning techniques in the FTU machine. The results of cleaning techniques performed on a 1:1 scale toroidal sector of FTU are outlined.

Additional information

Authors: FERRO C, ENEA, Centro Ricerche Energia Frascati (IT)
Bibliographic Reference: Report: RT/FUS/87/26 EN (1987)
Availability: Available from Servizio Studi e Documentazione, ENEA, Centro Ricerche Energia Frascati, C.P. 65-00044 Frascati, Roma (IT)
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