Randomized trial developed a high temperature superconductor current lead for superconducting magnets, suggesting improved cooling efficiency.
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.
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Saha et al. (2025) studied this question.
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