Design and fabrication of a 17 kA preprototype Nb/sub 3/Sn conductor for the TF coils of the NET fusion project

Design, fabrication, and some properties of a 17-kA model superconductor of limited length for the Next European Torus toroidal-field coils are reported. The design calls for a maximum local field of 11 T. The conductor is to be cooled by forced-flow supercritical helium. The Nb/sub 3/Sn cable has a central glass-fiber ribbon for AC loss reduction and is soldered on both sides to Cu-CuNi stabilizers having a honeycomb structure. The conductor has an outer steel jacket for mechanical reinforcement.<
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