Critical current and magnetic field performance of Bi-2223/Ag composite superconducting tapes

We report measurements of the electrical transport properties of Bi-2223/Ag composite conductors produced as part of the long-length product developme nt in an industrial plant. The powder-in-tube (PIT) process was used to man ufacture conductors containing various filament configurations including mo nofilament and multifilament tapes with untwisted and twisted filaments, an d round wires. The transport critical current I-c was measured at various t emperatures (T = 4 - 80 K) and magnetic fields (B = 0 - 9 T) for different orientations of the tapes with respect to the field, Self-field transport a c losses were determined at 77 K and 60 Hz as a function of ac current ampl itude (0 - 100 A rms). The strain performance was evaluated at 77 K for app lied bend strains from zero to 1.5 %.