Transient magnetization in practical composite superconductors

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This paper presents detailed magnetization measurements as well as analysis on typical cryostable NbTi composite conductors (1-mm diameter and Cu/SC ratio of 6:5) with filaments nonuniformly distributed in both circular and rectangular cross sections (aspect ratio approx. 2:1). As a result of the excellent agreement between the measurements and a previously reported transformer model, both transient magnetization and losses incurred in each sample can be described by functions of a unique time constant tau/sub 0/ which depends strongly on the shape of the cross section. Other prominent features of the measurement results such as the deduction of values of J/sub ... continued below

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Pages: 16

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Shen, S S January 1, 1979.

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Description

This paper presents detailed magnetization measurements as well as analysis on typical cryostable NbTi composite conductors (1-mm diameter and Cu/SC ratio of 6:5) with filaments nonuniformly distributed in both circular and rectangular cross sections (aspect ratio approx. 2:1). As a result of the excellent agreement between the measurements and a previously reported transformer model, both transient magnetization and losses incurred in each sample can be described by functions of a unique time constant tau/sub 0/ which depends strongly on the shape of the cross section. Other prominent features of the measurement results such as the deduction of values of J/sub c/ and matrix resistivity are demonstrated. In an exponentially decaying field from 2T to 0, J/sub c/ is 4.5 x 10/sup 9/ A/m/sup 2/ at 1.5T, and the average matrix resistivity is 2.73 x 10/sup -10/ ..cap omega..-m. Saturation effects were also observed for field decaying time constant tau comparable with tau/sub 0/.

Physical Description

Pages: 16

Notes

Dep. NTIS, PC A02/MF A01.

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  • Cryogenic engineering conference, Madison, WI, USA, 21 Aug 1979

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  • Report No.: CONF-790815-31
  • Grant Number: W-7405-ENG-26
  • Office of Scientific & Technical Information Report Number: 5998543
  • Archival Resource Key: ark:/67531/metadc1103561

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1979

Added to The UNT Digital Library

  • Feb. 18, 2018, 3:59 p.m.

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  • March 20, 2018, 8:07 p.m.

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Shen, S S. Transient magnetization in practical composite superconductors, article, January 1, 1979; United States. (digital.library.unt.edu/ark:/67531/metadc1103561/: accessed April 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.