| 摘要 |
PURPOSE:To increase the uniformity of magnetic field in the center space as well as to enhance the economical efficiency for the subject solenoid coil by a method wherein the cylindrical inner surface of the superconductive solenoid coil is locally or completely converted to a secondary curved surface. CONSTITUTION:A spherical surface is locally provided on the center part of the superconductive solenoid coil 1, or on the entire inside surface which is formed into a spherical surface. In either case, the wound-around part of the coil 1 is formed into uniform thickness, and the outer side face of the coil 1 is formed into spherical surface. Accordingly, the uniformity of the magnetic field is increased, thereby enabling enhancement in its economical efficiency. |
