Journal ArticleDOI
Strain scaling law for flux pinning in practical superconductors. Part 1: Basic relationship and application to Nb3Sn conductors
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In this article, the authors present the basic uniaxial-strain scaling relationship and focus on its application to Nb3Sn conductors, and propose a general scaling relation which unifies the usual temperature scaling relation with this strain-scaling relation.About:
This article is published in Cryogenics.The article was published on 1980-11-01. It has received 398 citations till now. The article focuses on the topics: Pinning force & Flux pinning.read more
Citations
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A methodology to compute the critical current limit in Nb3Sn magnets
Giorgio Vallone,E. Anderssen,Bernardo Bordini,Paolo Ferracin,Jose Ferradas Troitino,Soren Prestemon +5 more
TL;DR: In this article, the authors proposed a methodology to estimate the critical current and temperature margin reduction on superconducting magnets due to stress on the super-conducting material, which was tested on the MQXF magnets, a quadrupole developed for the High Luminosity LHC project.
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Residual strain measurement using neutron diffraction for practical Nb3Sn wires under a tensile load
Hidetoshi Oguro,Satoshi Awaji,Gen Nishijima,Kohki Takahashi,Kazuo Watanabe,Shutaro Machiya,Hiroshi Suzuki,Y. Tsuchiya,Kozo Osamura +8 more
TL;DR: In this paper, the residual strain of Nb3Sn superconducting wires was measured directly using neutron diffraction and the ratio between axial and lateral tensile strain was found to be 0.33.
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Strain and Magnetic-Field Characterization of a Bronze-Route ${\rm Nb}_{3}{\rm Sn}$ ITER Wire: Benchmarking of Strain Measurement Facilities at NIST and University of Twente
Najib Cheggour,Arend Nijhuis,Hendrikus J.G. Krooshoop,X. F. Lu,Jolene D. Splett,Theodore C. Stauffer,Loren F. Goodrich,M. C. Jewell,Arnaud Devred,Y. Nabara +9 more
TL;DR: A benchmarking experiment was conducted to compare strain measurement facilities at the National Institute of Standards and Technology (NIST) and the University of Twente as discussed by the authors, where the critical current of a bronze-route Nb3Sn wire was measured as a function of axial strain and magnetic field in liquid helium at both institutes.
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Strain Gauge Method for Evaluating a Three-Dimensional Residual Strain State in ${\rm Nb}_{3}{\rm Sn}$ Wires
TL;DR: In this article, the authors measured the upper critical field Bc2% in a three-dimensional strain state for Nb3Sn wires and found that the axial tensile tensile strain variation 0.3% roughly corresponded to the lateral compressive strain variation 1.1% in both axial and lateral directions.
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Field dependence of the n-value and its relation with the critical current of Nb 3 Sn strands
TL;DR: In this paper, the Kramer model including thermal activation was proposed to explain the critical current data at 4.2 K, even at high field near the upper critical field, and compared with Ekin's strain scaling law.
References
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Journal ArticleDOI
Flux vortices and transport currents in type II superconductors
A. M. Campbell,J. E. Evetts +1 more
TL;DR: In this paper, the authors considered the effects of lattice rigidity on the summation of pinning forces and showed that a summation based on statistical arguments uses the same approximations and leads to the same results as a dissipation argument.
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Scaling laws for flux pinning in hard superconductors
TL;DR: In this paper, it was shown that the peak in Fp scales as [Hc2(T)]2.5 if the temperature is changed; the maximum value of Fp occurred at the same value of reduced field regardless of temperature.
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Flux pinning mechanisms in type II superconductors
TL;DR: In this article, expressions for flux-pinning in type II superconductors are derived from considerations of the nature of the interaction between individual flux-lines and pinning-centres, and of the geometry of th...
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Hysteresis in Superconducting Alloys-Temperature and Field Dependence of Dislocation Pinning in Niobium Alloys
W. A. Fietz,W. W. Webb +1 more
TL;DR: In this paper, critical current and pinning-force densities in a series of niobium alloys subjected to severe plastic deformation have been determined from measurements of complete hysteretic magnetization curves on alloys with Ginzburg-Landau parameter $\ensuremath{\kappa}$ between 1.3 and 13 at temperatures from the critical temperature ${T}_{c}$ down to $0.14{T}
Journal ArticleDOI
Elastic energy of the vortex state in type II superconductors. I. High inductions
TL;DR: In this article, the elastic properties of the flux line lattice (FLL) in type II superconductors are calculated from the linearized Ginzburg-Landau (GL) theory for large inductions.