Ac loss and thermal runaway of 1 T cryocooler-cooled oxide superconducting pulsed coil

A 1T cryocooler-cooled oxide superconducting pulsed coil, which is a 16 layer solenoidal coil wound with an interlayer-transposed 4-strand parallel conductor composed of Bi2223 multifilamentary flat wires is fabricated. The thermal properties of the cryocooler-cooled oxide superinducting pulsed coil is described, taking into account the heat generation of ac loss and flux-flow loss and the cooling capacity of a cryocooler Ac loss and the cooling capacity of the cryocooler have been studied.