| 摘要 |
PURPOSE:To generate a strong magnetic field by a method wherein a winding is divided into a plurality of regions in accordance with the direction of a magnetic field generated at the winding part, wire materials of the split region parts are arranged so as to be in a direction in which the deterioration of a critical current density is small and coils in the individual split regions are connected in series. CONSTITUTION:A layer B in which tapes are arranged so as to make the direction of a magnetic field parallel with the surface of the tape is formed. Layers A, C at its inside and outside are connected in series. In the regions A, C of a superconducting coil, ordinary straight tape wire materials are solenoid-wound; in the region B, a tape wire material which has been bent in advance to a curvature equal to the curvature at the part is laminated. Consequently, it is possible to prevent a partial critical current density from being deteriorated in the coil and to obtain a uniform critical density of the coil as a whole. Thereby, the strong magnetic field or the compact size of a coil device can be realized. |
