A 1.8 K current feedthrough using YBCO bulk conductor for supplying 20 kA

K. Maehata, K. Ishibashi, T. Shintomi, A. Iwamoto, R. Maekawa, T. Mito

Research output: Contribution to journalConference article

Abstract

Rectangle-shaped YBCO bulk conductors 20 mm wide, 140 mm long and 10 mm thick were manufactured from square-pillar-shaped YBCO bulk materials for supplying a 20 kA current into a pressurized superfluid cooling region at a temperature of 1.8 K. An assembled 1.8 K current feedthrough was mounted in the λ-plate of a pressurized superfluid cooling cryostat. Current-feed experiments into the 1.8 K region were carried out by operating the 20 kA current feedthrough. In the experiments, the transport current was kept at 20 kA for longer than 1200 s. Contact resistance and Joule heat generation in the joint region between the YBCO bulk conductors and the copper electrode were 1.45 nΩ and 0.72 W, respectively, in the 20 kA operation.

Original languageEnglish
Pages (from-to)770-776
Number of pages7
JournalPhysica C: Superconductivity and its applications
Volume426-431
Issue numberI
DOIs
Publication statusPublished - Oct 1 2005
EventProceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity -
Duration: Nov 23 2004Nov 25 2004

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Maehata, K., Ishibashi, K., Shintomi, T., Iwamoto, A., Maekawa, R., & Mito, T. (2005). A 1.8 K current feedthrough using YBCO bulk conductor for supplying 20 kA. Physica C: Superconductivity and its applications, 426-431(I), 770-776. https://doi.org/10.1016/j.physc.2005.02.079