Experimental and numerical analysis of interfilament resistances in NbTi strands.
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| Title: | Experimental and numerical analysis of interfilament resistances in NbTi strands. |
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| Authors: | Breschi, M1 marco.breschi@unibo.it, Massimini, M1, Ribani, P L1, Spina, T2, Corato, V1 |
| Source: | Superconductor Science & Technology. May2014, Vol. 27 Issue 2, p055021-055028. 8p. |
| Subjects: | Numerical analysis, Superconductivity, Numerical calculations, University of Bologna, Nuclear cross sections, Electrical resistance tomography |
| Abstract: | Superconducting strands are composite wires made of fine superconducting filaments embedded in a metallic matrix. The transverse resistivity among superconducting filaments affects the coupling losses during electromagnetic transients and the electro-thermal behavior of the wire in case of a quench. A direct measurement of the transverse interfilament resistance as a function of temperature in NbTi multi-filamentary wires was performed at the ENEA Frascati Superconductivity Division, Italy by means of a four-probe method. The complexity of these measurements is remarkable, due to the current distribution phenomena that occur among superconducting filaments during these tests. A two-dimensional finite element method model of the wire cross section and a three-dimensional electrical circuit model of the wire sample developed at the University of Bologna are applied here to derive qualitative and quantitative information about the transverse electrical resistance matrix. The experiment is aimed at verifying the qualitative behaviors and trends predicted by the numerical calculations, especially concerning the current redistribution length and consequent length effects of the sample under test. A fine tuning of the model parameters at the filament level allowed us to reproduce the experimental results and get quantitative information about the current distribution phenomena between filaments. [ABSTRACT FROM AUTHOR] |
| Copyright of Superconductor Science & Technology is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 95392811 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Experimental and numerical analysis of interfilament resistances in NbTi strands. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Breschi%2C+M%22">Breschi, M</searchLink><relatesTo>1</relatesTo><i> marco.breschi@unibo.it</i><br /><searchLink fieldCode="AR" term="%22Massimini%2C+M%22">Massimini, M</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ribani%2C+P+L%22">Ribani, P L</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Spina%2C+T%22">Spina, T</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Corato%2C+V%22">Corato, V</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Superconductor+Science+%26+Technology%22">Superconductor Science & Technology</searchLink>. May2014, Vol. 27 Issue 2, p055021-055028. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Numerical+analysis%22">Numerical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Superconductivity%22">Superconductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Numerical+calculations%22">Numerical calculations</searchLink><br /><searchLink fieldCode="DE" term="%22University+of+Bologna%22">University of Bologna</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+cross+sections%22">Nuclear cross sections</searchLink><br /><searchLink fieldCode="DE" term="%22Electrical+resistance+tomography%22">Electrical resistance tomography</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Superconducting strands are composite wires made of fine superconducting filaments embedded in a metallic matrix. The transverse resistivity among superconducting filaments affects the coupling losses during electromagnetic transients and the electro-thermal behavior of the wire in case of a quench. A direct measurement of the transverse interfilament resistance as a function of temperature in NbTi multi-filamentary wires was performed at the ENEA Frascati Superconductivity Division, Italy by means of a four-probe method. The complexity of these measurements is remarkable, due to the current distribution phenomena that occur among superconducting filaments during these tests. A two-dimensional finite element method model of the wire cross section and a three-dimensional electrical circuit model of the wire sample developed at the University of Bologna are applied here to derive qualitative and quantitative information about the transverse electrical resistance matrix. The experiment is aimed at verifying the qualitative behaviors and trends predicted by the numerical calculations, especially concerning the current redistribution length and consequent length effects of the sample under test. A fine tuning of the model parameters at the filament level allowed us to reproduce the experimental results and get quantitative information about the current distribution phenomena between filaments. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Superconductor Science & Technology is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1088/0953-2048/27/5/055021 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 055021 Subjects: – SubjectFull: Numerical analysis Type: general – SubjectFull: Superconductivity Type: general – SubjectFull: Numerical calculations Type: general – SubjectFull: University of Bologna Type: general – SubjectFull: Nuclear cross sections Type: general – SubjectFull: Electrical resistance tomography Type: general Titles: – TitleFull: Experimental and numerical analysis of interfilament resistances in NbTi strands. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Breschi, M – PersonEntity: Name: NameFull: Massimini, M – PersonEntity: Name: NameFull: Ribani, P L – PersonEntity: Name: NameFull: Spina, T – PersonEntity: Name: NameFull: Corato, V IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2014 Type: published Y: 2014 Identifiers: – Type: issn-print Value: 09532048 Numbering: – Type: volume Value: 27 – Type: issue Value: 2 Titles: – TitleFull: Superconductor Science & Technology Type: main |
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