Performance test of a refrigerator cooled magnet fabricated using Bi-2212 multilayer superconducting tapes

A refrigerator cooled magnet composed of 10 double stacked pancake coils manufactured from silver-alloy sheathed Bi-2212 multilayer superconducting tapes has been tested. The results indicate that the magnet is capable of operating at temperatures of 12 degrees Kelvin (K) at an operating current of 45 Angstrom (A). The magnet, which carried a critical current of 57A at 12K, did not exhibit any sign of thermal runaway even at a ramp rate of 10T/min.