| 摘要 |
PROBLEM TO BE SOLVED: To restrain a drop in a magnetic field between two superconducting multilayer composite cylinders arranged so as to be faced coaxially, to efficiently confine the magnetic field to the inside of every superconducting multilayer composite cylinder and to restrain an irregularity due to the place of the magnetic field generated in every superconducting multilayer composite cylinder in a superconducting interlayer composite cylinder for an interventional magnetic resonance imaging(MRI) medical diagnostic apparatus. SOLUTION: In a composite cylinder, a cylinder which is manufactured by a deep drawing operation from a superconducting multilayer plate composed of an NbTi alloy, of Nb and of a high-conductivity metal is integrated. In addition, it is a cylinder in which a roll-wound multilayer plate is inserted between multilayer cylinders so as to be integrated, a cylinder in which a resistance heating element such as an Ni-Cr alloy or the like is inserted between multilayer cylinders so as to be integrated, a cylinder in which a protruding part at an ear generated in a deep drawing operation and a recessed-part generation part are compounded and integrated in such a way that both parts do not agree and that deep drawing directions of adjacent cylinders are different, and a composite cylinder which combines them. |
