GENERATION OF 21.5 T BY A SUPERCONDUCTING MAGNET SYSTEM USING A BI2SR2CACU2OX AG COIL AS AN INSERT MAGNET/

We fabricated a Bi2Sr2CaCu2Ox/Ag pancake coil by applying a dip-coatin g process, which was used as an insert coil of conventional supercondu cting magnet system. The critical current of the insert coil at satura ted superfluid helium temperature (1.8 K) in the bias field of 20.8 T, was 275 A, and the field generated at this current was 0.7 T. As a re sult, we could achieve the field generation of 21.5 T at the center of the magnet system which was the highest field obtained by the full su perconducting state.