Progress in BSCCO-2223 tape technology

American Superconductor Corp., 2 Technology Dr., Westborough MA 01581 USA ASC multifilamentary composite tape based on BSCCO-2223 high temperature superconductor (HTS) and a scalable rolling process has reached a record superconductor critical current density J(c) (77 K, 0 T) of up to 58,000 A/cm(2), and engineering (full cross-section including metal sheath) J(c) (77 K, 0 T) up to 15,000 A/cm(2). Pilot manufacturing of long lengths (100-400 m) has permitted a variety of increasingly significant prototypes, including a 200 hp ac synchronous motor, a 3300 A (77 K) 50 m machine-stranded cable conductor, a 5 kJ SMES system, and an operational ion-beam switching magnet installed in a tandem accelerator for carbon mass spectrometry dating. Recent ASC progress in manufacturing with Je over 8000 A/cm(2) creates new opportunities for yet more advanced prototypes and commercial development.