Application of HTS BI-2223 for current leads of superconducting magnets

The most developed area of the using of high temperature superconductivity is for the moment the current leads, especially current leads assigned for superconducting magnets of particle accelerators. In this paper IHEP experience in this area is reported. The short description of 600 A current leads design is presented. Current leads were made on the base of composite tapes with Bi-2223 filaments both in Ag+1at.%Au and in Ag+10at.%Au matrices. Thermal and electrical properties of current leads were studied and obtained results are compared with the demands for LHC 600 A current leads. Current leads exhibit the high stability to the origination and development of quench.