SUPERCONDUCTIVE MAGNET DEVICE AND MAGNETIC FIELD UNIFORMITY ADJUSTING METHOD

摘要

PROBLEM TO BE SOLVED: To facilitate the adjustment of the uniformity of a magnetic field. SOLUTION: This superconductive magnet device is so formed that narrow- piece ferromagnet shims 51 and 52 are disposed on surfaces of a pair of superconductive magnets 27 and 31 oppositely disposed with annular superconductive coils 26 and 30 stored therein so as to improve the uniformity of the magnetic field of a uniform magnetic field space formed adjacently to the central part of the superconductive magnets 27 and 31. Ringed ferromagnetic shims 49 and 50 are also disposed on the surfaces of the superconductive magnets 27 and 31 concentrically to the center of the annular superconductive coils 26 and 30.