Design study of conduction-cooled high temperature superconducting magnet

We are designing and fabricating a separator using the conduction-cooled high temperature superconducting (HTS) magnet for a National high-technology program in China. The magnet is made of Bi-2223 double pancake coils, and has inner and outer coil diameters of 120 mm and 211.2 mm, respectively and coil height of 202.8 mm. The superconducting magnet includes 20 double pancake coils. The operating current is about 87.8 A. This magnet is cryocooler-cooled with no liquid helium and should generate a magnetic filed of 3 T at a temperature of 20 K. We developed and tested a model Bi-2223 double pancake coil. The design and technique of the magnet is reported in the paper.