Generation of extremely strong magnetic fields in open space by using metal-ring-reinforced 60 mm ∅ Sm-Ba-Cu-O superconducting bulk

Y. Yanagi, M. Yoshikawa, Y. Itoh, Tetsuo Oka, H. Ikuta, U. Mizutani

研究成果: Article

15 引用 (Scopus)

抄録

Based on detailed analysis on the maximum tensile stress acting in the 60 mm diameter Sm123 bulk superconductor due to trapped fields and the compensation effect due to a stainless-steel ring reinforcement, we have proposed the new "stress-controlling magnetization" method, in which a bulk superconductor is magnetized not to a full extent but to such a level that super current does not circulate in its central area. This is very effective because the bulk remains within its fracture limit while increasing its total trapped flux upon decreasing temperature as low as possible. In addition, we could optimize a thickness of the stainless-steel ring to prevent the bulk from fracturing at a given temperature. In this way, we could produce the highest field of 7.2 and 5.2 T on the surface of the bulk superconductor and on the top surface of the vacuum cylinder 3 mm above the surface of the bulk, i.e., in the working space at room temperature, respectively.

元の言語English
ページ(範囲)744-749
ページ数6
ジャーナルPhysica C: Superconductivity and its Applications
412-414
発行部数SPEC. ISS.
DOI
出版物ステータスPublished - 2004 10 1
外部発表Yes

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Superconducting materials
Metals
Stainless Steel
Magnetic fields
reinforcement rings
stainless steels
rings
Stainless steel
magnetic fields
metals
fracturing
tensile stress
Tensile stress
Temperature
Magnetization
Reinforcement
Vacuum
Fluxes
magnetization
vacuum

ASJC Scopus subject areas

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

これを引用

Generation of extremely strong magnetic fields in open space by using metal-ring-reinforced 60 mm ∅ Sm-Ba-Cu-O superconducting bulk. / Yanagi, Y.; Yoshikawa, M.; Itoh, Y.; Oka, Tetsuo; Ikuta, H.; Mizutani, U.

:: Physica C: Superconductivity and its Applications, 巻 412-414, 番号 SPEC. ISS., 01.10.2004, p. 744-749.

研究成果: Article

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abstract = "Based on detailed analysis on the maximum tensile stress acting in the 60 mm diameter Sm123 bulk superconductor due to trapped fields and the compensation effect due to a stainless-steel ring reinforcement, we have proposed the new {"}stress-controlling magnetization{"} method, in which a bulk superconductor is magnetized not to a full extent but to such a level that super current does not circulate in its central area. This is very effective because the bulk remains within its fracture limit while increasing its total trapped flux upon decreasing temperature as low as possible. In addition, we could optimize a thickness of the stainless-steel ring to prevent the bulk from fracturing at a given temperature. In this way, we could produce the highest field of 7.2 and 5.2 T on the surface of the bulk superconductor and on the top surface of the vacuum cylinder 3 mm above the surface of the bulk, i.e., in the working space at room temperature, respectively.",
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AU - Yanagi, Y.

AU - Yoshikawa, M.

AU - Itoh, Y.

AU - Oka, Tetsuo

AU - Ikuta, H.

AU - Mizutani, U.

PY - 2004/10/1

Y1 - 2004/10/1

N2 - Based on detailed analysis on the maximum tensile stress acting in the 60 mm diameter Sm123 bulk superconductor due to trapped fields and the compensation effect due to a stainless-steel ring reinforcement, we have proposed the new "stress-controlling magnetization" method, in which a bulk superconductor is magnetized not to a full extent but to such a level that super current does not circulate in its central area. This is very effective because the bulk remains within its fracture limit while increasing its total trapped flux upon decreasing temperature as low as possible. In addition, we could optimize a thickness of the stainless-steel ring to prevent the bulk from fracturing at a given temperature. In this way, we could produce the highest field of 7.2 and 5.2 T on the surface of the bulk superconductor and on the top surface of the vacuum cylinder 3 mm above the surface of the bulk, i.e., in the working space at room temperature, respectively.

AB - Based on detailed analysis on the maximum tensile stress acting in the 60 mm diameter Sm123 bulk superconductor due to trapped fields and the compensation effect due to a stainless-steel ring reinforcement, we have proposed the new "stress-controlling magnetization" method, in which a bulk superconductor is magnetized not to a full extent but to such a level that super current does not circulate in its central area. This is very effective because the bulk remains within its fracture limit while increasing its total trapped flux upon decreasing temperature as low as possible. In addition, we could optimize a thickness of the stainless-steel ring to prevent the bulk from fracturing at a given temperature. In this way, we could produce the highest field of 7.2 and 5.2 T on the surface of the bulk superconductor and on the top surface of the vacuum cylinder 3 mm above the surface of the bulk, i.e., in the working space at room temperature, respectively.

KW - Metal-ring reinforcement

KW - Sm-Ba-Cu-O

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KW - Superconducting bulk magnet

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