DEVELOPMENT OF BI-2223 AG TAPES AND COILS

Long high critical current density Bi-2223/Ag tapes are required for t he realization of cables and windings to be integrated in electric pow er devices. A cooperation agreement among CISE SpA, Europa Metalli and INFN, concerns the development of silver-sheathed multifilamentary Bi -2223/Ag tapes, over 100 meters long, produced by means of the Powder- In-Tube (PIT) technique, The Bi-2223/Ag tapes were thermomechanically processed and then wound into double pancakes by the React & Wind meth od, This article presents and discusses the electrical and magnetic ch aracterization of the tapes, their degradation after winding as well a s the performances of the pancakes tested after the final assembling.