| 摘要 |
PROBLEM TO BE SOLVED: To provide a control method capable of stably operating a refrigerator conduction cooling type superconducting coil employing an oxide high temperature superconductor. SOLUTION: Thermal resistance between a refrigerator and a superconducting coil connected to a cooling stage of the refrigerator is obtained. From the rated cooling capacity of the refrigerator and the thermal resistance, an effective cooling curve representing the relationship between temperature and a calorific value is obtained. Operation of the superconducting coil which is energized while being cooled by the refrigerator is controlled such that the calorific value of the superconducting coil at a predetermined temperature does not exceed the effective cooling curve. COPYRIGHT: (C)2011,JPO&INPIT |
