An Improved model for the strain dependence of the superconducting properties of Nb3Sn

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We propose an improved model for the strain dependence of the superconducting properties of Nb{sub 3}Sn. The model is based on the three dimensional strain tensor and derived in terms of the first, second and third invariants, and improves an existing model that only includes the second invariant. The axial form of the new model accurately accounts for the experimentally observed dependence of the effective upper critical magnetic field (H*{sub c2}) on axial strain, i.e. a quasi-parabolic strain dependence, asymmetry, and an upturn at large compressive axial strain. An accurate model that accounts for the three dimensional nature of strain ... continued below

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Arbelaez, D.; Godeke, A. & Prestemon, S. O. May 1, 2008.

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We propose an improved model for the strain dependence of the superconducting properties of Nb{sub 3}Sn. The model is based on the three dimensional strain tensor and derived in terms of the first, second and third invariants, and improves an existing model that only includes the second invariant. The axial form of the new model accurately accounts for the experimentally observed dependence of the effective upper critical magnetic field (H*{sub c2}) on axial strain, i.e. a quasi-parabolic strain dependence, asymmetry, and an upturn at large compressive axial strain. An accurate model that accounts for the three dimensional nature of strain is important for scaling relations for the critical current that are used to model magnet performance based on wire measurements.

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  • Journal Name: Superconductor Science&Technology.; Journal Volume: 22; Journal Issue: 2

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  • Report No.: LBNL-2840E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 979020
  • Archival Resource Key: ark:/67531/metadc927694

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  • May 1, 2008

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  • Nov. 13, 2016, 7:26 p.m.

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  • Jan. 4, 2017, 3:07 p.m.

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Arbelaez, D.; Godeke, A. & Prestemon, S. O. An Improved model for the strain dependence of the superconducting properties of Nb3Sn, article, May 1, 2008; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc927694/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.