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dc.contributor.authorKapolka, M
dc.contributor.authorPardo, E
dc.contributor.authorGrilli, F
dc.contributor.authorBaskys, A
dc.contributor.authorClimente-Alarcon, V
dc.contributor.authorDadhich, A
dc.contributor.authorGlowacki, B A
dc.date.accessioned2020-03-13T09:57:21Z
dc.date.available2020-03-13T09:57:21Z
dc.date.issued2020-03-13
dc.date.submitted2019-08-07
dc.identifier.issn0953-2048
dc.identifier.othersustab5aca
dc.identifier.otherab5aca
dc.identifier.othersust-103450.r1
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/303386
dc.description.abstractAbstract: Stacks of superconducting (SC) tapes can trap much higher magnetic fields than conventional magnets. This makes them very promising for motors and generators. However, ripple magnetic fields in these machines present a cross-field component that demagnetizes the stacks. At present, there is no quantitative agreement between measurements and modeling of cross-field demagnetization, mainly due to the need for a 3D model that takes the end effects and real micron-thick SC layer into account. This article presents 3D modeling and measurements of cross-field demagnetization in stacks of up to 5 tapes and initial magnetization modeling of stacks of up to 15 tapes. 3D modeling of the cross-field demagnetization explicitly shows that the critical current density, Jc, in the direction perpendicular to the tape surface does not play a role in cross-field demagnetization. When taking the measured anisotropic magnetic field dependence of Jc into account, 3D calculations agree with measurements with less than a 4% deviation, while the error of 2D modeling is much higher. Then, our 3D numerical methods can realistically predict cross-field demagnetization. Due to the force-free configuration of part of the current density, J, in the stack, better agreement with experiments will probably require measuring the Jc anisotropy for the whole solid angle range, including J parallel to the magnetic field.
dc.languageen
dc.publisherIOP Publishing
dc.rightsAttribution 3.0 Unported (CC BY 3.0)en
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/en
dc.subjectPaper
dc.subjectFocus on Numerical Modelling of High Temperature Superconductors 2020
dc.subjectsuperconducting stacks
dc.subjectcross-field demagnetization
dc.subjectmodeling of high temperature superconductors
dc.subject3D modeling
dc.subjectReBCO coated conductors
dc.subjectsupermagnets
dc.subjectrotating machines
dc.titleCross-field demagnetization of stacks of tapes: 3D modeling and measurements
dc.typeArticle
dc.date.updated2020-03-13T09:57:20Z
prism.issueIdentifier4
prism.publicationNameSuperconductor Science and Technology
prism.volume33
dc.identifier.doi10.17863/CAM.50474
dcterms.dateAccepted2019-11-22
rioxxterms.versionofrecord10.1088/1361-6668/ab5aca
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/3.0/
dc.contributor.orcidKapolka, M [0000-0002-4932-2946]
dc.contributor.orcidPardo, E [0000-0002-6375-4227]
dc.contributor.orcidGrilli, F [0000-0003-0108-7235]
dc.contributor.orcidBaskys, A [0000-0002-1875-8107]
dc.contributor.orcidClimente-Alarcon, V [0000-0002-1273-8454]
dc.contributor.orcidGlowacki, B A [0000-0003-2165-6378]
dc.identifier.eissn1361-6668
pubs.funder-project-idH2020 Societal Challenges (723119)
pubs.funder-project-idEuropean Regional Development Fund (ITMS 26230120002)
pubs.funder-project-idVedecká Grantová Agentúra MŠVVaŠ SR a SAV (VEGA) (2/0097/18)
pubs.funder-project-idAgentúra na Podporu Výskumu a Vývoja (APVV-14-0438)


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Attribution 3.0 Unported (CC BY 3.0)
Except where otherwise noted, this item's licence is described as Attribution 3.0 Unported (CC BY 3.0)