RECENT ADVANCES IN LONG LENGTH BI-2223 HTS MULTIFILAMENTARY COMPOSITEWIRE DEVELOPMENT

Developing applications for HTS technology are now enabled by a new ge neration of superconducting wires that bring together the required ele ctrical and mechanical properties in long lengths that are durable whe n exposed to practical application environments. Advances in the devel opment and scale-up of long-length Bi-2223 HTS composite wire are revi ewed. Powder-in-tube processing was used to produce multifilamentary t apes in continuous lengths up to 1 kilometer. Electrical performance a nd uniformity results are reported for the wire in 300 meter and 1 kil ometer lengths. Mechanical and environmental durability performance re sults are reported for multifilament wire tapes being developed for re act-and-wind cable application as well as for wind-and-react coil and magnet applications. The use of these wires in practical demonstration applications is also reported.