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This paper is a survey of the development progress towards high-field, high-current superconducting conductors suitable for further experimental fusion machines. The reference is the International Thermonuclear Experimental Reactor, ITER, a world-wide project presently in the engineering design activity phase. The main conclusions are that the Nb(3)Sn strand available is almost up to ITER specifications, the feasibility of the cabling procedure has been demonstrated, suitable jacket materials have been identified, and the pull-through draw-down jacketing technique has been applied successfully to significant lengths of subsize conductor. R&D activity is required to upgrade the background knowledge to the level necessary for fabrication of the long-length, full-size ITER conductors. Qualification of welding procedures for Incoloy 908 is required. Further investigation has to be made on the effect of chromium plating on the RRR of the strands and on the transverse resistivity of the cable versus void fraction and/or transverse loads.

Additional information

Authors: SPADONI M, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Paper presented: MT-13, Thirteenth International Conference on Magnet Technology, Victoria, September 20-24, 1993
Availability: Available from (1) as Paper EN 37907 ORA
Record Number: 199311439 / Last updated on: 1994-11-28
Original language: en
Available languages: en
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