Applications and secondary fabrication of practical superconducting materials

A description has been given of some of the large scale applications of niobium-based multifilamentary superconductors. Most of these require the construction of magnets of such a size that conductors in the form of fine wires cannot meet their requirements. A description has been given of how several standard basic units of NbTi and Nb Sn wires can be subjected to secondary fabrication to form the necessary high current carrying conductors. An attempt has been made to show that commercially available Nb-based superconductors can meet the requirements of these ambitious application programs. (AU)