After a successful development of a superconducting joint between NbTi wire and Bi-2223 tape using Bi-added PbSn solder, we have been focusing on superconducting joint developments and evaluations. A newly developed superconducting joint resistance evaluation system will be introduced. Most recently, we have started a new project of development of magnetic refrigeration system for hydrogen liquefaction. An outline of the project will be introduced.
Research Center for Functional Materials, NIMS