FABRICATION OF A CONDUCTION COOLED SUPERCONDUCTING MAGNET FOR THE SOLIDIFICATION OF HIGH-ENTROPY ALLOYS

According to the technical requirements，a conduction cooled superconducting magnet with the center magnetic field of 10 T and room bore size of 100 mm was designed and fabricated.The magnet consists of 1 set of NbTi coil and 4 sets of Nb₃Sn coils accommodated by a cryostat with an outer diameter of 650 mm and height of 612 mm.The magnet system was cooled by a 1.5 W@4.2 K G-M cryocooler from room temperature to 2.92 K in 62 hours and the total weight of the system is 388 kg.The magnet was tested and reached the maximum operating current of 119.95 A，corresponding to a center magnetic field of 10.001 T without quenching.