| 摘要 |
PURPOSE:To obtain the uniform magnetic field of a sole coil and to eliminate the difficulty of manufacturing steps by winding a superconductive wire to gradually increase the outer diameter at both axial ends from the axial center. CONSTITUTION:A superconductive magnet magnetic gradually increases the number of turns of a superconductive wire 2 from the center toward both ends to provide the secondary curvature axially on the outer peripheral surface of a cylindrical superconductive coil 1. The coil 1 is formed by two ways of double pancake winding and solenoid winding methods. Since the numbers of windings at both ends of the coil 1 to originally weaken a magnetic fields is more than that at the center, a uniform magnetic field can be obtained at the center of the coil 1. Thus, a coil burning loss at quenching time of specific problem of the case that two coils are used can be completely avoided, the shapes of the winding shaft and the bobbin can be not necessarily formed specially, and no particular difficulty arises in the winding step. |
