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Critical Current Simulation and Measurement of Second Generation, High-Temperature Superconducting Coil under External Magnetic Field

This paper studies the critical current of second generation, high temperature superconducting coils under an external magnetic field experimentally and numerically. Two identical coils with different coated conductors are fabricated and tested under a direct current (DC) magnetic field along the ax...

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Detalles Bibliográficos
Autores principales: Yu, Dongmin, Liu, Huanan, Zhang, Xinhe, Gong, Taorong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5872918/
https://www.ncbi.nlm.nih.gov/pubmed/29495386
http://dx.doi.org/10.3390/ma11030339
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author Yu, Dongmin
Liu, Huanan
Zhang, Xinhe
Gong, Taorong
author_facet Yu, Dongmin
Liu, Huanan
Zhang, Xinhe
Gong, Taorong
author_sort Yu, Dongmin
collection PubMed
description This paper studies the critical current of second generation, high temperature superconducting coils under an external magnetic field experimentally and numerically. Two identical coils with different coated conductors are fabricated and tested under a direct current (DC) magnetic field along the axis of the coil. Then, a numerical model in cylindrical coordinates based on a sheet current model is built by taking the measured magnetic field dependency to analyze the current distribution and magnetic field distribution. The simulated critical currents of the coils under the DC magnetic field have good agreement with the measured results. We find that under the in-phase field, the critical current decreases as the magnetic field in the innermost turn is enhanced by the external field. Meanwhile, the anti-phase external field increases the critical current a bit at first, then decreases the critical current. We further discuss the critical current criteria of the coils, showing that the parallel field plays a more important role in critical current determination.
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spelling pubmed-58729182018-03-30 Critical Current Simulation and Measurement of Second Generation, High-Temperature Superconducting Coil under External Magnetic Field Yu, Dongmin Liu, Huanan Zhang, Xinhe Gong, Taorong Materials (Basel) Article This paper studies the critical current of second generation, high temperature superconducting coils under an external magnetic field experimentally and numerically. Two identical coils with different coated conductors are fabricated and tested under a direct current (DC) magnetic field along the axis of the coil. Then, a numerical model in cylindrical coordinates based on a sheet current model is built by taking the measured magnetic field dependency to analyze the current distribution and magnetic field distribution. The simulated critical currents of the coils under the DC magnetic field have good agreement with the measured results. We find that under the in-phase field, the critical current decreases as the magnetic field in the innermost turn is enhanced by the external field. Meanwhile, the anti-phase external field increases the critical current a bit at first, then decreases the critical current. We further discuss the critical current criteria of the coils, showing that the parallel field plays a more important role in critical current determination. MDPI 2018-02-26 /pmc/articles/PMC5872918/ /pubmed/29495386 http://dx.doi.org/10.3390/ma11030339 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yu, Dongmin
Liu, Huanan
Zhang, Xinhe
Gong, Taorong
Critical Current Simulation and Measurement of Second Generation, High-Temperature Superconducting Coil under External Magnetic Field
title Critical Current Simulation and Measurement of Second Generation, High-Temperature Superconducting Coil under External Magnetic Field
title_full Critical Current Simulation and Measurement of Second Generation, High-Temperature Superconducting Coil under External Magnetic Field
title_fullStr Critical Current Simulation and Measurement of Second Generation, High-Temperature Superconducting Coil under External Magnetic Field
title_full_unstemmed Critical Current Simulation and Measurement of Second Generation, High-Temperature Superconducting Coil under External Magnetic Field
title_short Critical Current Simulation and Measurement of Second Generation, High-Temperature Superconducting Coil under External Magnetic Field
title_sort critical current simulation and measurement of second generation, high-temperature superconducting coil under external magnetic field
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5872918/
https://www.ncbi.nlm.nih.gov/pubmed/29495386
http://dx.doi.org/10.3390/ma11030339
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