Cooling system, magnetic field generator, and method of operation

A cooling system comprising:

• a vacuum insulation container;
• an object to be cooled, arranged in the vacuum insulation container;
• a cryogenic refrigerator comprising a cold stage configured to generate cold;
• a thermal conduction connector connecting the cold stage and the object to be cooled in a thermally conductive manner;
• one or more temperature sensors;
• a current lead arranged in the vacuum insulation container;
• and
• a controller, wherein
• the one or more temperature sensors are each configured to detect a temperature of one of the object to be cooled, the cold stage, the thermal conduction connector, and the current lead, and
• the controller is configured to perform
• an operation stop process to stop operation of the cryogenic refrigerator in a case in which, while the cryogenic refrigerator is operating, the temperature detected by any one of the one or more temperature sensors drops to a predetermined target cooling temperature, and
• an operation start process to start operation of the cryogenic refrigerator in a case in which, while operation of the cryogenic refrigerator is stopped, the temperature detected by any one of the one or more temperature sensors rises to a predetermined operation start temperature that is higher than the predetermined target cooling temperature.