Magnetic field stability of a small ybco magnet in persistent current mode

Woo Seok Kim, Chan Park, Sang Ho Park, Jikwang Lee, Jung Bin Song, Haigun Lee, Hee Gyoun Lee, Gye Won Hong, Kyeongdal Choi

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


It is well known that HTS (high temperature superconductor) is promising for magnet applications, but it has been almost impossible so far to apply them to magnets in persistent current mode because of poor qualities of their superconducting joints at higher current as well as their lower index values. To get rid of the non-superconducting joints from an HTS superconducting magnet, a wind-and-flip technique for demonstrating a persistent current mode operation of HTS magnet using YBCO coated conductors had been suggested. This paper presents experimental results of measured drift of a persistent current in the YBCO pancake coil which was made by using the wind-and-flip technique. The pancake coil was wound by YBCO coated conductor with a width of 12 mm, which was slit longitudinally at the center of the conductor along the conductor by a specially designed slitter. A stainless steel heater was attached on the one end ofthe YBCO conductor as a persistent current switch to energize the pancake coil. A temporal stability of the magnetic field was analyzed by monitoring the long-term drift of the magnetic field at 77.3 K by hall sensors.

Original languageEnglish
Article number5067208
Pages (from-to)2194-2197
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number3
Publication statusPublished - 2009 Jun

Bibliographical note

Funding Information:
Manuscript received August 22, 2008. First published June 05, 2009; current version published July 15, 2009. This work was supported by Electric Power Industry Technology Evaluation and Planning. W.-S. Kim and C. Park are with Seoul National University, Seoul, Korea (e-mail: S. H. Park, H.-G. Lee, G.-W. Hong, and K. Choi are with Korea Polytechnic University, Shiheung, Korea (e-mail: J. K. Lee is with Woosuk University, Jeonbuk, Korea (e-mail: jikwang@ J.-B. Song is with Korea University, Seoul, Korea. H. Lee is with Korea Polytechnic University, Shiheung, Korea. He is also with Korea University, Seoul, Korea (e-mail: Color versions of one or more of the figures in this paper are available online at Digital Object Identifier 10.1109/TASC.2009.2018750

Copyright 2009 Elsevier B.V., All rights reserved.


  • Persistent current mode
  • Superconducting joint
  • Wind-and-flip
  • Ybco coated conductor

ASJC Scopus subject areas

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


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