Characteristics of REBCO coated conductors for 25 T cryogen-free superconducting magnet

S. Fujita, H. Satoh, M. Daibo, M. Y. Iijima, M. Itoh, H. Oguro, S. Awaji, K. Watanabe

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

A 25 T cryogen-free superconducting magnet is under development at the High Field Laboratory for Superconducting Materials (HFLSM), Institute for Materials Research (IMR), Tohoku University. Fujikura has manufactured and supplied REBCO coated conductors for the 25 T cryogen-free superconducting magnet. In-field critical current (Ic) properties in high magnetic fields at lower temperatures below 20 K and mechanical properties are important for design of these superconducting magnets. However, there is insufficient data of Ic properties in high magnetic fields above 15 T. In this work, in-field Ic properties at 20 K, 15 T of several samples cut from commercial coated conductors are evaluated at HFLSM, IMR, Tohoku University. The correlations between Ic at 20 K, 15 T and Ic at 77.3 K are compared. As a result, it is confirmed that Ic at 20 K, 15 T have a stronger correlation with in-field Ic at 77.3 K rather than Ic at 77.3 K, self-field. In addition, tensile strengths at 77.3 K of more than 30 samples of coated conductors are also evaluated.

Original languageEnglish
Article number6945362
JournalIEEE Transactions on Applied Superconductivity
Volume25
Issue number3
DOIs
Publication statusPublished - 2015 Jun 1

Keywords

  • Critical current density
  • High temperature superconductors
  • Superconducting magnets
  • Yttrium barium copper oxide

ASJC Scopus subject areas

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

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