| 摘要 |
PROBLEM TO BE SOLVED: To constitute a cooling circulating passage of an inclined magnetic field coil system 2 so as to satisfy the requirements for a basic magnetic field of a permanent magnet in a magnetic resonance system having a single circulating type cooling circulating passage actuated by a cooling medium for cooling the inclined magnetic field coil system 2 and changing a temperature of at least one surface of the inclined magnetic field coil system 2 in a prescribed temperature range. SOLUTION: Rated output of the cooling circulating passage 1 is made to coincide with average ohm loss electric power of the inclined magnetic field coil system 2. This cooling circulating passage 1 has heat exchangers 6, 6a having a high on/off operation cycle and capable of being at least turned on and off. The above inclined magnetic field coil system 2 has high average specific heat, and a coolant has an operation temperature range exceeding a settable temperature range.
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