Production and Operation of a 15 T Hybrid Magnet System Powered by a Single Power Supply

摘要

We have recently developed a thin-type Cu clad stabilized ${rm Nb}_{3}{rm Al}$ flat-wire which can be more densely wound into a coil. Using this flat-wire we have upgraded an existing 14 T ${rm Nb{hbox{-}}Ti/Nb}_{3}{rm Sn}$ magnet with a $phi$ 30 mm clear bore, by replacing the inner coil, to a compact 15 T ${rm Nb{hbox{-}}Ti/Nb}_{3}{rm Al}$ magnet. The ${rm Nb}_{3}{rm Al}$ inner coil was connected in series with the Nb-Ti outer coil and excited by a common power supply to generate 15 T in a $phi$ 40 mm clear bore, after a training of Nb-Ti coil. The resultant higher field and wider space will be used for critical current measurements of various superconducting wires being developed in NIMS.