Development of HTS Current Lead for Cryo-Cooler Based Superconducting Magnet

High Temperature Superconductor (HTS) based current lead is an essential requirement to minimize the conduction heat load to the cryo-cooler cooled superconducting magnet. A HTS current lead consist of normal conducting part, made of ETP copper transferring current from 300 K to 45 K and the other part made of high temperature superconductor for current transfer from 45K to 4.2 K has been developed and tested. This current lead can carry maximum 300 A of current with minimum heat transfer to 4.2 K stage. This paper present the design of current leads, main fabrication steps and test results.