| 摘要 |
PURPOSE:To avoid reduction of thermal conductance between a superconducting coil and a reinforcing cylinder by a method wherein when the bobbinless superconducting coil is to be manufactured, a superconductor is wound for the prescribed number of turns around the outside of a cylindrical bobbin at first, then the reinforcing cylinder is fitted on the outside of the conductor thereof, and the bobbin is disassembled to be removed. CONSTITUTION:A superconductor 6 is wound for the prescribed number of turns holding proper tension around the outside of a nearly cylindrical bobbin 5, and a reinforcing cylinder 2 is fitted on the outside of thus obtained superconducting coil 1. At this time, size of the inside diameter of the reinforcing cylinder 2 is processed to be smaller than size of the outside diameter of the coil 1 as to make prestress to be applied always to the coil 1 according to the reinforcing cylinder 2. The outside diameter of the reinforcing cylinder 2 is expanded by applying a temperature difference at assembling time in such a way, and when the coil 1 and the reinforcing cylinder 2 become to the same temperature, prestress is made to be applied to the coil 1. After then, the bobbin 5 fallen into disuse is disassembled to be removed. Accordingly, the cooling characteristic of the coil 1 is enhanced. |
