CONDUCTOR DESIGN WITH HIGH-T-C SUPERCONDUCTING BI(PB)-2223 AG MULTIFILAMENTARY TAPES/

With high upper critical fields, high temperature superconductors (HTS C) have been recognised as candidate materials for coil and magnet app lications. High field devices, at one time or another, when operated c lose to their rated limits are often faced with instability problems w hich normally are electrical, magnetic or mechanical in nature. The de termination of stability parameters, therefore, is of interest to the conductor designer which very much assists in the processing aspect of long length production of wires and tapes. Due to the morphology of t he superconductor most HTSC devices made with Bi(Pb)-2223 precursor ex ist in tape form. Here the determination of stability parameters (for flux-jump and cryogenic stability) for multifilamentary Bi(Pb)-2223/Ag tapes are presented. Processing parameters such as intermediate defor mation and filling factors have been found to play a crucial role, not only on the critical current density of the tapes but on the stabilit y aspect in conductor design as well.