Current Bypassing Properties by Thermal Switch for PCS Application on NMR/MRI HTS Magnets

S. B. Kim, M. Takahashi, R. Saito, Y. J. Park, M. W. Lee, Y. K. Oh, H. S. Ann

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


We develop the compact NMR/MRI device using high temperature superconducting (HTS) wires with the persistent current mode operating. So, the joint techniques between 2G wires are very important issue and many studies have been carried out. Recently, the KJOINS, Inc. has developed successfully the high performance superconducting joints between 2G wires by partial melting diffusion and oxygenation annealing process [1]. In this study, the current bypassing properties in a loop-shaped 2G wire are measured experimentally to develop the permanent current switch (PSC). The current bypassing properties of loop-shaped test coil wound with 2G wire (GdBCO) are evaluated by measured the self-magnetic field due to bypassed current by Hall sensors. The strain gauge was used as heater for persistent current switch, and thermal properties against various thermal inputs were investigated experimentally.

Original languageEnglish
Pages (from-to)149-152
Number of pages4
JournalPhysics Procedia
Publication statusPublished - 2015
Event27th International Symposium on Superconductivity, ISS 2014 - Tokyo, Japan
Duration: Nov 25 2014Nov 27 2014


  • HTS coil magnet
  • NMR relaxometry
  • joints between 2G wires
  • permanent current mode
  • persistent current switch (PCS)

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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