| 摘要 |
PROBLEM TO BE SOLVED: To provide a superconductive magnet device of a refrigerator cooling type, where a magnetic field of very high uniformity can be obtained. SOLUTION: The superconductive magnet device 10 is equipped with a main magnetic field generating superconductive magnet 13 and a magnetic field uniformity correcting superconductive magnet 18 which are provided in a radiation shield 12 in a vacuum heat-insulating vessel 11. The second cold head (low-temperature side) 16 of a refrigerator 14 is thermally connected to the main magnetic field generating superconductive magnet 13, and the magnetic field uniformity correcting superconductive magnet 18 through the intermediary of a heat transfer plate 17 formed of material, such as copper or the like, excellent in heat-transfer characteristics to keep them at cryogenic temperatures on a liquid helium temperature level. The main magnetic field generating superconductive magnet 13 is connected to a main magnetic field generating power supply 13a, and the magnetic field uniformity correcting superconductive magnet 18 is connected to a magnetic field uniformity correcting power supply 18a. COPYRIGHT: (C)2005,JPO&NCIPI |
