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Anomalous Low Hysteresis Losses in NbTi Superconductors with Very Fine Filaments

Schmidt, C.

Abstract Hysteresis losses of multifilamentary NbTi/Cu/CuNi mixed matrix conductors with very fine filaments were measured in the frame of the VAMAS intercomparison. A calorimetric technique was developed for the purpose allowing short sample measurements in the microwatt range. This method allows an independent variation of the magnetic background field and the alternating field amplitude. For low amplitudes, the losses were found to be well below the values expected from the Bean model. A similar behaviour, found recently in magnetization measurements, was explained by reversible flux line motion. The present data are reasonably well described by an existing theory. The paper includes also the results of two samples having thicker filaments.

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Anomalous Low Hysteresis Losses in NbTi Superconductors with Very Fine Filaments

Schmidt, C.

Abstract Hysteresis losses of multifilamentary NbTi/Cu/CuNi mixed matrix conductors with very fine filaments were measured in the frame of the VAMAS intercomparison. A calorimetric technique was developed for the purpose allowing short sample measurements in the microwatt range. This method allows an independent variation of the magnetic background field and the alternating field amplitude. For low amplitudes, the losses were found to be well below the values expected from the Bean model. A similar behaviour, found recently in magnetization measurements, was explained by reversible flux line motion. The present data are reasonably well described by an existing theory. The paper includes also the results of two samples having thicker filaments.

Anomalous Low Hysteresis Losses in NbTi Superconductors with Very Fine Filaments

Schmidt, C.

Abstract Hysteresis losses of multifilamentary NbTi/Cu/CuNi mixed matrix conductors with very fine filaments were measured in the frame of the VAMAS intercomparison. A calorimetric technique was developed for the purpose allowing short sample measurements in the microwatt range. This method allows an independent variation of the magnetic background field and the alternating field amplitude. For low amplitudes, the losses were found to be well below the values expected from the Bean model. A similar behaviour, found recently in magnetization measurements, was explained by reversible flux line motion. The present data are reasonably well described by an existing theory. The paper includes also the results of two samples having thicker filaments.

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Dokumentinformationen

Titel:

Anomalous Low Hysteresis Losses in NbTi Superconductors with Very Fine Filaments

Beteiligte:

Schmidt, C. (Autor:in)

Erschienen in:

Advances in Cryogenic Engineering Materials ; 207-214

An International Cryogenic Materials Conference Publication ; 36

Erscheinungsdatum:

01.01.1990

Format / Umfang:

8 pages

ISBN:

978-1-4613-9882-0 , 978-1-4613-9880-6

ISSN:

DOI:

https://doi.org/10.1007/978-1-4613-9880-6_27

Medientyp:

Aufsatz/Kapitel (Buch)

Format:

Elektronische Ressource

Sprache:

Englisch

Schlagwörter:

Critical Current Density , Background Field , Flux Line , Hysteresis Loss , Coupling Loss Chemistry , Biochemical Engineering , Characterization and Evaluation of Materials , Mechanical Engineering

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