MANUFACTURE OF SUPERCONDUCTING COIL

摘要

PURPOSE:To enable manufacture under the state with no strain while easily enabling manufacture even when using a superconducting material of a compound system by forming a spiral groove to a layer of a super-conductor formed to the whole surface of a substrate and forming a spiral thin beltlike superconductor among these grooves. CONSTITUTION:A material in which a layer of a para-conductor such as copper 16 is formed to the surface of a thin plate such as stainless 14 is used as the substrate 12. The substrate 12 takes a shape such as a doughnut shape, and a hole 18 is formed at its central section. The layer of the superconductor 20 is formed to the surface of the substrate 12 as follows. When the superconductor 20 is of Nb3Sn, a solder plated niobium plate of the same size (an extent) as the substrate 12 is joined onto copper 16 by solder 22. A layer of Nb3Sn is formed through heat treatment. The spiral groove 24 is formed through cutting, etc. in the same manner as the grooving of records. The depth of the groove 24 extends over depth reaching the surface of at least copper 16, and solder 22 is also cut together.