Experimental Results of Screening-Current Field with 10-T Class Small REBCO Coil

S. Iwai, H. Miyazaki, Y. Ohtani, T. Tosaka, K. Tasaki, S. Nomura, T. Kurusu, Hiroshi Ueda, S. Noguchi, A. Ishiyama, S. Urayama, H. Fukuyama

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A REBCO-coated conductor has a tape shape and is suitable for forming a stack of single pancakes for generating a high magnetic field. However, the magnetic flux going through the tape surface causes a screening current, which reduces the magnetic field in conventional coil designs. Magnetic resonance imaging systems need high uniformity of the magnetic field, both spatially and temporally, and thus, the screening field resulting from the screening current is one of the critical issues. In this paper, a 10-T class small test coil using REBCO-coated conductors was fabricated and tested in a conduction-cooled configuration from 10 to 60 K for investigating the effect of the screening field on the generated magnetic field in the inner space of the coil. The coil was composed of a stack of 22 single pancakes using 4-mm-wide REBCO tapes with an inner diameter of 50 mm, an outer diameter of 129 mm, and a height of 104 mm. For different stacking orders based on the coil critical currents, the measured values of the central magnetic field at 10 K were 7.66 and 8.27 T, which were lower than the calculated values of 8.07 and 8.70 T obtained without taking account of the screening-current fields.

Original languageEnglish
Article number7407613
JournalIEEE Transactions on Applied Superconductivity
Volume26
Issue number4
DOIs
Publication statusPublished - Jun 1 2016
Externally publishedYes

Fingerprint

Screening
coils
screening
Magnetic fields
Tapes
tapes
magnetic fields
conductors
Critical currents
Magnetic flux
Magnetic resonance imaging
magnetic resonance
magnetic flux
critical current
conduction
causes
configurations

Keywords

  • degradation
  • MRI
  • REBCO-coated conductor
  • screening-current field

ASJC Scopus subject areas

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

Cite this

Iwai, S., Miyazaki, H., Ohtani, Y., Tosaka, T., Tasaki, K., Nomura, S., ... Fukuyama, H. (2016). Experimental Results of Screening-Current Field with 10-T Class Small REBCO Coil. IEEE Transactions on Applied Superconductivity, 26(4), [7407613]. https://doi.org/10.1109/TASC.2016.2530301

Experimental Results of Screening-Current Field with 10-T Class Small REBCO Coil. / Iwai, S.; Miyazaki, H.; Ohtani, Y.; Tosaka, T.; Tasaki, K.; Nomura, S.; Kurusu, T.; Ueda, Hiroshi; Noguchi, S.; Ishiyama, A.; Urayama, S.; Fukuyama, H.

In: IEEE Transactions on Applied Superconductivity, Vol. 26, No. 4, 7407613, 01.06.2016.

Research output: Contribution to journalArticle

Iwai, S, Miyazaki, H, Ohtani, Y, Tosaka, T, Tasaki, K, Nomura, S, Kurusu, T, Ueda, H, Noguchi, S, Ishiyama, A, Urayama, S & Fukuyama, H 2016, 'Experimental Results of Screening-Current Field with 10-T Class Small REBCO Coil', IEEE Transactions on Applied Superconductivity, vol. 26, no. 4, 7407613. https://doi.org/10.1109/TASC.2016.2530301
Iwai, S. ; Miyazaki, H. ; Ohtani, Y. ; Tosaka, T. ; Tasaki, K. ; Nomura, S. ; Kurusu, T. ; Ueda, Hiroshi ; Noguchi, S. ; Ishiyama, A. ; Urayama, S. ; Fukuyama, H. / Experimental Results of Screening-Current Field with 10-T Class Small REBCO Coil. In: IEEE Transactions on Applied Superconductivity. 2016 ; Vol. 26, No. 4.
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