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

We report measurements of the electrical transport properties of ((BiPb)/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/-Ag) Bi-2223/Ag composite conductors produced as part of the long-length product development in an industrial plant. The powder-in-tube (PIT) process was used to manufacture conductors containing various filament configurations including monofilament and multifilament tapes with untwisted and twisted filaments, and round wires. The transport critical current I/sub c/ was measured at various temperatures (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 ac losses were determined at 77 K and 60 Hz as a function of ac current amplitude (0-100 A rms). The strain performance was evaluated at 77 K for applied bend strains from zero to 1.5%.