BSCCO/Ag tapes made by a tape-in-rectangular tube process

Multi-core tape composites with various filament configurations have been m ade by a tape-in-rectangular tube (TIRT) process. This TIRT process is base d on the deformation of multifilamentary composites assembled from a rectan gular Ag (Ag-alloy) tube filled by pre-deformed single-core BSCCO/Ag tapes. Two-axial rolling induces texture in the filaments in two rolling planes, with the filament planes oriented parallel or perpendicular to the tape wid th, thus reducing the high I, anisotropy which can degrade the total curren t in coils working at high temperatures (77 K). The homogeneity of the fila ments was studied by a magneto-optical technique. Roll-sintered samples wer e measured at 77 K in an external magnetic field up to 1 T and at constant fields (0.1 T and 0.5 T) at various orientations (between parallel and perp endicular) to the tape surface. The results demonstrate the possibility of using these tapes for selected parts of a coil winding to reduce the appare nt effect of the radial field component on the reduction of the total coil current.