Thermal analysis of PCS for an HTS pancake coil in persistent current mode

Woo Seok Kim, Yungil Kim, Sang Ho Park, Seyeon Lee, Ji Kwang Lee, Chan Park, Bang Wook Lee, Kyoung Jun Kim, Haigun Lee, Hee Gyoun Lee, Gye Won Hong, Kyeongdal Choi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

It is well known that high temperature superconductors (HTS) are promising for a magnet application, but it has been almost impossible so far to apply them to the magnet in persistent current mode because of poor qualities of their superconducting joint at higher current as well as lower index values. In this paper, in order to get rid of the joints from an HTS superconducting magnet, a prototype HTS pancake coil using YBCO coated conductors by the technique of wind-and-flip pancake coil was made and will be tested later. This paper presents a design, fabrication, and thermal analysis of the prototype pancake coil. The coil will be cooled down around 20 K by conduction cooling using a GM cryocooler. The expected current drift rate for an MRI application has not been achieved, probably caused by large flux flow resistance of coated conductor at higher temperature, 77.3 K. A temperature dependency of temporal stability of the persistent current will be measured by monitoring the long-term drift of the magnetic field at different operating temperatures by Hall sensors.

Original languageEnglish
Article number5433242
Pages (from-to)1009-1012
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume20
Issue number3
DOIs
Publication statusPublished - 2010 Jun

Bibliographical note

Funding Information:
Manuscript received October 20, 2009. First published March 18, 2010; current version published May 28, 2010. This research was supported by a grant from Center for Applied Superconductivity Technology of the 21st Century Frontier R&D Program funded by the Ministry of Education, Science and Technology, Republic of Korea. W.-S. Kim and C. Park are with the Department of Materials Science & Engineering, Seoul National University, Seoul, 151-742, Korea (e-mail: pchan@snu.ac.kr). Y. Kim, S.-H. Park, S. Lee, H.-G. Lee, G.-W. Hong, and K. Choi are with the Graduated School of Energy, Korea Polytechnic University, Siheung, Korea. J.-K. Lee is with the Department of Fire Protection and Safety, Woosuk University, Jeollabuk-do, Korea. B.-W. Lee is with the Division of Electrical Engineering and Computer Science, Hanyang University, Ansan, Korea. K.-J. Kim and H. Lee are with the Department of Materials Science and Engineering, Korea University, Seoul, Korea. Digital Object Identifier 10.1109/TASC.2010.2041769

Keywords

  • Conduction cooling
  • 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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