A new structure for a magnetic field concentrator using NbTi sheet superconductors

Z. Y. Zhang, S. Matsumoto, S. Choi, Ryo Teranishi, T. Kiyoshi

Research output: Contribution to journalArticle

13 Citations (Scopus)


The magnetic lens, a new device for concentrating magnetic flux using the diamagnetism of superconductors, has been experimentally confirmed by employing HTS bulk. In this paper, a new magnetic lens made of NbTi/Cu rings is introduced. The rings, which have identical outer diameters and increasing inner diameters, were stacked to form a hollow cone. Each ring has a slit to suppress the circumference current. The slits were placed in the same position to form a leakage path. The lens was assembled in an existing cryostat system with a NbTi magnet, and the magnetic properties were measured. The concentrated magnetic flux density rose to 0.618 T when the background field reached 0.339 T at the tip of the lens. The concentration ratio was 1.82. These experimental results agree well with the numerical results.

Original languageEnglish
Pages (from-to)1547-1549
Number of pages3
JournalPhysica C: Superconductivity and its applications
Issue number21-22
Publication statusPublished - Nov 1 2011

All Science Journal Classification (ASJC) codes

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

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