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A method for decreasing transport ac losses in multifilamentary and multistrip superconductors

Abstract

A new method is proposed for decreasing transport ac losses in multifilamentary superconductors by the decoupling of the filaments using a magnetic material in the form of thin layers surrounding the individual filaments. For a superconductor with an elliptical cross section, the magnetic material surrounding the filaments affects the local magnetic field distribution that both reduces the critical current of the filaments and induces the transport ac losses in the magnetic material. Even by taking into account any detrimental influences of the presence of the magnetic material around the filaments, the analysis of the experimental data supported by computer modelling confirmed that for a Bi2223 tape with 100 filaments individually covered by magnetic material, such as iron powder, the transport ac losses should be 65 times lower than for the same multifilamentary conductor without the magnetic coating on the filaments. With an increasing number of filaments, the ac loss decrease would be even larger. (author)
Authors:
Glowacki, B A; [1]  IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE (United Kingdom)]; Majoros, M [2] 
  1. Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ (United Kingdom)
  2. IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE (United Kingdom)
Publication Date:
Jul 01, 2000
Product Type:
Journal Article
Reference Number:
EDB-00:076402
Resource Relation:
Journal Name: Superconductor Science and Technology (Online); Journal Volume: 13; Journal Issue: 7; Other Information: Country of input: IAEA; 17 refs; PBD: Jul 2000
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AC LOSSES; BISMUTH; CRITICAL CURRENT; FILAMENTS; SUPERCONDUCTING FILMS; SUPERCONDUCTING WIRES
OSTI ID:
20083273
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1361-6668; TRN: GB00$1230038414
Submitting Site:
GBN
Size:
page(s) 971-973
Announcement Date:
Sep 17, 2000

Citation Formats

Glowacki, B A, IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE (United Kingdom)], and Majoros, M. A method for decreasing transport ac losses in multifilamentary and multistrip superconductors. United Kingdom: N. p., 2000. Web. doi:10.1088/0953-2048/13/7/311.
Glowacki, B A, IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE (United Kingdom)], & Majoros, M. A method for decreasing transport ac losses in multifilamentary and multistrip superconductors. United Kingdom. doi:10.1088/0953-2048/13/7/311.
Glowacki, B A, IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE (United Kingdom)], and Majoros, M. 2000. "A method for decreasing transport ac losses in multifilamentary and multistrip superconductors." United Kingdom. doi:10.1088/0953-2048/13/7/311. https://www.osti.gov/servlets/purl/10.1088/0953-2048/13/7/311.
@misc{etde_20083273,
title = {A method for decreasing transport ac losses in multifilamentary and multistrip superconductors}
author = {Glowacki, B A, IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE (United Kingdom)], and Majoros, M}
abstractNote = {A new method is proposed for decreasing transport ac losses in multifilamentary superconductors by the decoupling of the filaments using a magnetic material in the form of thin layers surrounding the individual filaments. For a superconductor with an elliptical cross section, the magnetic material surrounding the filaments affects the local magnetic field distribution that both reduces the critical current of the filaments and induces the transport ac losses in the magnetic material. Even by taking into account any detrimental influences of the presence of the magnetic material around the filaments, the analysis of the experimental data supported by computer modelling confirmed that for a Bi2223 tape with 100 filaments individually covered by magnetic material, such as iron powder, the transport ac losses should be 65 times lower than for the same multifilamentary conductor without the magnetic coating on the filaments. With an increasing number of filaments, the ac loss decrease would be even larger. (author)}
doi = {10.1088/0953-2048/13/7/311}
journal = {Superconductor Science and Technology (Online)}
issue = {7}
volume = {13}
journal type = {AC}
place = {United Kingdom}
year = {2000}
month = {Jul}
}