Design and experiment of HTS current leads for superconducting Wiggler magnets
By upgrading and transforming the cryogenic system of the superconducting Wiggler magnet at the Hefei National Synchrotron Radiation Laboratory.The copper current lead of the original cryogenic system was upgraded to the high-tempera-ture superconducting current lead,and the GM cryocooler was used to cool the high-temperature superconducting current leads.After completing the design,the first cooling experiment,and the electrification experiment,the experimental data was analyzed,and the cooling capacity of the cryogenic system was allocated and adjusted to improve the safe operation margin of the cryogenic system.The adjusted experimental results show that the cooling time of the high-temperature superconducting current lead is shortened by 0.7 hours,the cooling temperature is reduced by 7 K,the maximum operating current of the 460 A current lead is increased by 19％,and the maximum operating current of the 20 A current lead is increased by 30％.
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