Development of a Desktop-Type Superconducting Bulk Magnet

K. Yokoyama, Eranda Kulawansha, Zhao Yuanding, Tetsuo Oka

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We developed a desktop-type superconducting bulk magnet using a Stirling cryocooler with the aim of miniaturizing the system. This refrigerator was compact and highly energy efficient because a compressor was not needed outside; power consumption was approximately 160 W. Moreover, the length of the magnetic pole was decreased by restricting the activation method to pulsed field magnetization. A GdBCO bulk material 45 mm in diameter and 20 mm thick was attached to the cold stage of a refrigerator and was covered with a vacuum chamber. The sample was cooled from room temperature to 52.3 K in approximately 4.5 h. When a single pulsed field was applied in amplitudes varying from 0.8 to 7.0 T, the maximum trapped field was approximately 2.8 T at the center of the bulk surface in the applied field of 7.0 T. Moreover, the maximum magnetic field on the chamber's surface was approximately 1.3 T, and the total magnetic flux was 0.94 mWb. The operational status after magnetization was good, and the operating sound was small.

Original languageEnglish
Article number7386635
JournalIEEE Transactions on Applied Superconductivity
Volume26
Issue number4
DOIs
Publication statusPublished - 2016 Jun 1
Externally publishedYes

Fingerprint

Refrigerators
refrigerators
Magnets
Magnetization
magnets
magnetic poles
magnetization
Magnetic flux
compressors
vacuum chambers
magnetic flux
Compressors
Poles
Electric power utilization
chambers
Chemical activation
Acoustic waves
activation
Vacuum
Magnetic fields

Keywords

  • bulk superconductor
  • high magnetic field
  • pulsed field magnetization
  • Stirling cryocooler

ASJC Scopus subject areas

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

Cite this

Development of a Desktop-Type Superconducting Bulk Magnet. / Yokoyama, K.; Kulawansha, Eranda; Yuanding, Zhao; Oka, Tetsuo.

In: IEEE Transactions on Applied Superconductivity, Vol. 26, No. 4, 7386635, 01.06.2016.

Research output: Contribution to journalArticle

Yokoyama, K. ; Kulawansha, Eranda ; Yuanding, Zhao ; Oka, Tetsuo. / Development of a Desktop-Type Superconducting Bulk Magnet. In: IEEE Transactions on Applied Superconductivity. 2016 ; Vol. 26, No. 4.
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