Development of NbTi Superconductor for the SSC by Sumitomo Electric Industries

NbTi superconductor to be used for the Inner coil of Collider Dipole Magnet has been developing by Sumitomo Electric Industries, Ltd.(SEI). We adopt the 12 inch composite billet with production unit weight of above 300 kg. This large billet is well designed to improve yield of extrusion, and assembled by using an unique single stacking technique under severe cleanliness control.