ANALYSIS FOR QUENCH OF SUPERCONDUCTING MAGNETS INCLUDING THE INDUCED CURRENT EFFECT

Quenching of a superconducting coil with metal vessels is affected by the induced current. A numerical calculational method in which vessels are treated as coils is used, taking account of the influence on the magnet generated by the induced current. The calculational results sho w that the profile of the superconducting current decay strongly depen ds on the helium vessel's resistance. Furthermore, the temperature at the superconducting coil is lower as the resistance of the helium vess el is lower. Use of the helium vessel with low resistance is demonstra ted as having an effect of delaying the time when the magnetic field b egins to decrease.