Patent ID: 8280468

Claim:
A superconducting magnet device for a single crystal pulling apparatus that is arranged outside a pulling furnace containing therein a crucible for melting a single crystal material so as to apply a magnetic field to the melted single crystal material, the superconductive magnet device comprising: a cryostat that encloses a pair of superconducting coils arranged oppositely to each other with a predetermined magnetic field space being interposed therebetween to thereby generate a horizontal magnetic field; a refrigerator port arranged on an outer surface of the cryostat; and a cryogenic refrigerator that cools the superconducting coil that is provided on the refrigerator port, wherein the cryogenic refrigerator is provided in a region of an outer surface region of the cryostat at which an intensity of a magnetic field generated by the superconducting coil is less than 100 mT.