Abstract
We have fabricated and measured a high-capacity superconducting current lead composed of a Y1Ba2Cu3O7−x cylinder, 20 cm long and 0.9 cm2 cross section. A steady-state, d.c., critical current of 225 A at a temperature of 77 K was measured in this sample, using a voltage criterion of 2×10−7 V/cm (p = 8×10−10 ohm-cm). This current was limited by the currentinduced, self magnetic field. To our knowledge this is the largest d.c. critical current so far reported in a Y1Ba2Cu3O7−x sample and demonstrates the possibility of using hightemperature superconducting HTS materials for current leads to low-temperature superconducting LTS magnets or in power distribution systems.
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Gubser, D.U., Miller, M.M., Alford, N.M. et al. High-capacity superconducting current leads of Y1Ba2Cu3O7−x . J Supercond 3, 221–226 (1990). https://doi.org/10.1007/BF00624512
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DOI: https://doi.org/10.1007/BF00624512