| 摘要 |
PURPOSE:To transmit the electromagnetic force and its own weight of a superconducting coil positively over a base rock through a heat-insulating support structure by applying pre-compression to a superconducting coil conductor only by quantity corresponding to the quantity of thermal shrinkage at a time when the coil is cooled and conducting winding. CONSTITUTION:A superconducting coil conductor 9 is given pre-compression only by quantity corresponding to the quantity of thermal shrinkage at a time when 9 coil is cooled, and wound so as to be fast stuck onto the internal surface of a heat-insulating support structure 16. That is, when the superconducting coil conductor 9 is wound gradually on a coil bobbin to an arcuate shape, the superconducting coil conductor 9 is wound on the coil bobbin while being compressed in the axial direction of the superconducting coil conductor 9, stress is generated, and force intending to expand in the outer circumferential direction is imparted to the superconducting coil 3. Accordingly, pre-compression is released gradually as the cooling of the superconducting coil 3 progresses, and functions as reaction to force intending to shrink on cooling, thus preventing looseness generated between the superconducting coil 3 and the heat-insulating support structure 16. |
