Variable-temperature critical current measurements on YBaCuO coated conductors

The critical currents of 1 cm wide YBCO coated tapes, fabricated within the EC-funded project READY, have been measured. Critical current data as a function of temperature from 4.2 K to 77 K in magnetic fields up to 6 T, together with data at 4.2 K in fields up to 20 T, are presented. The future use of such conductors in high-field magnet-insert coils is considered through comparison of the data with those for Bi-2212, Bi-2223, NbTi and Nb 3 Sn conductors at liquid helium temperatures.