| 摘要 |
PURPOSE:To reduce the thickness of insulating film of a superconducting coil conductor and to enhance the space factor of a superconducting wire by a method wherein a pair of flat ring-shaped metal plates, having a spiral-shaped coil-housing groove and a prescribed potential respectively and insulated with each other, are laminated. CONSTITUTION:Flat ring-shaped metal plates 1A to 1G, provided with the groove wherein a superconducting coil conductor 10 of a spiral double-pancake-wound coil 5 will be housed, are laminated through the intermediary of an insulating layer 23. One of a pair of plates 1A to 1G is maintained at the same potential as an external lead-out part through an outer circumferential side junction part 17, other part is maintained at the same potential as the inner circumferential side transition part 6, which is connected to a power supply part 22, through the transition part 6, and a metal plate laminated body 1 is fixed by a clamping bolt 30. Using the constitution wherein the potential of a pair of metal plates, with which each layer coil is pinched, is maintained at the prescribed value and potential difference is reduced to the value equal to the allotment voltage of each layer coil, the potential difference which is formed by the dielectric covering of the superconducting coil conductor can be reduced, the space factor of the superconducting wire can be enhanced by the reduction in thickness of the covering, and the magnetic flux density of a toroidal magnetic field can also be enhanced without increasing the size of the coil. |
