Proposal of new type Ag-BSCCO tapes and wires with low losses

In order to get Ag-BSCCO tapes or wires with small losses, we propose a new fabrication technique named the 'wrapping method.' This is not only an alternative technique for fabrication of tapes and wires with very small twist pitches and well-aligned filaments instead of the conventional twisting process but also a new method of producing tapes and wires with transposed filaments. Especially for the latter, it is theoretically confirmed that a uniform distribution of transport currents in the new two-layered multifilamentary wire can be easily obtained by optimizing wire parameters. As a result transport current produced hysteresis losses can be reduced to the desired level in the multi-layered wire with transposed filaments.