| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for detecting normal conduction transition of a forced refrigeration type superconducting coil by a fluid method, and in particular, a method for detecting normal conduction transition (quench) of a forced refrigeration type superconducting coil used in a nuclear fusion device, an energy storing device, or the like. SOLUTION: According to this method for detecting normal conduction transition of the superconducting coil employing a forced refrigeration type conductor using helium, a helium flow-rate reduction expression is prepared, effective heating time of helium is introduced into this, thus finding a relation between flow ratio and heating values. By using this relation, the heating value of helium at the time of normal conduction transition is predicted from an actual flow ratio.
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