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

Research output: Contribution to journalArticle

15 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)744-749
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume412-414
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2004 Oct 1
Externally publishedYes

Fingerprint

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

Keywords

  • Metal-ring reinforcement
  • Sm-Ba-Cu-O
  • Stress-controlling magnetization
  • Superconducting bulk magnet

ASJC Scopus subject areas

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

Cite this

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.

In: Physica C: Superconductivity and its Applications, Vol. 412-414, No. SPEC. ISS., 01.10.2004, p. 744-749.

Research output: Contribution to journalArticle

@article{c7756b90813d4748be89dbc609c40d06,
title = "Generation of extremely strong magnetic fields in open space by using metal-ring-reinforced 60 mm ∅ Sm-Ba-Cu-O superconducting bulk",
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.",
keywords = "Metal-ring reinforcement, Sm-Ba-Cu-O, Stress-controlling magnetization, Superconducting bulk magnet",
author = "Y. Yanagi and M. Yoshikawa and Y. Itoh and Tetsuo Oka and H. Ikuta and U. Mizutani",
year = "2004",
month = "10",
day = "1",
doi = "10.1016/j.physc.2004.01.099",
language = "English",
volume = "412-414",
pages = "744--749",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",
number = "SPEC. ISS.",

}

TY - JOUR

T1 - Generation of extremely strong magnetic fields in open space by using metal-ring-reinforced 60 mm ∅ Sm-Ba-Cu-O superconducting bulk

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

KW - Stress-controlling magnetization

KW - Superconducting bulk magnet

UR - http://www.scopus.com/inward/record.url?scp=4644297923&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4644297923&partnerID=8YFLogxK

U2 - 10.1016/j.physc.2004.01.099

DO - 10.1016/j.physc.2004.01.099

M3 - Article

VL - 412-414

SP - 744

EP - 749

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - SPEC. ISS.

ER -