| 摘要 |
PURPOSE:To restrain a local rise of a magnetic field in the end part of a superconductive solenoid coil by arranging a magnetic circuit member in the end part of a superconductive solenoid coil in the shortest distance within a permissible limit. CONSTITUTION:The superconductive wire 4 having a thin cross-sectional shape which is formed by burying a superconductor 2 in a stabilizing material 3 is wound on a wiring frame 5 to obtain a cylindrical solenoid coil 1. Then the coil 1 is contained in a cryostat 6 and it is arranged near a magnetic circuit member 8 for magnetic shielding in the shortest distance within a permissible limit. Consequently a strength of a magnetic field becomes as shown by a line (a) and a local rise of a magnetic field in the end part can be restrained. |
