MAGNET CABLE TECHNOLOGY DEVELOPMENT FOR HIGH-TEMPERATURE SUPERCONDUCTOR COMPOSITE WIRE

Magnet cabling technology has been developed for Bi-based HTS composit e wire. Concentric round cabling as well as Rutherford cabling has bee n proven in >100 m lengths. For Bi-2223 precursor composite wire, post -cabling deformation is required to achieve high transport engineering current density (J(e)), and early results have reached 5500 A/cm(2) a t 77 K and self-field. Cable-and-deform conductor has similar magnetic field retention and anisotropy as conventional, nontransposed multifi lament Bi-2223 composites with comparable J(e). HTS magnet cabled comp osites have great potential for providing high I-c, J(e), and reducing fabrication cost. (C) 1997 Elsevier Science Ltd.