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Stuart C. Wimbush  - - - 
84
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Publication Record
Distribution of Articles published per year 
(1999 - 2018)
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published in
 
22
 
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PREPRINT 0 Reads 0 Citations The onset of dissipation in high-temperature superconductors: magnetic hysteresis and field dependence Evgeny F. Talantsev, Nick M. Strickland, Stuart C. Wimbush, ... Published: 29 November 2018
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Recently, we showed that the self-field transport critical current, Ic(sf), of a superconducting wire can be defined in a more fundamental way than the conventional (and arbitrary) electric field criterion, Ec = 1 microV/cm. We defined Ic(sf) as the threshold current, Ic,B, at which the perpendicular component of the local magnetic flux density, measured at any point on the surface of a high-temperature superconducting tape, abruptly crosses over from a non-linear to a linear dependence with increasing transport current. This effect results from the current distribution across the tape width progressively transitioning from non-uniform to uniform. The completion of this progressive transition was found to be singular. It coincides with the first discernible onset of dissipation and immediately precedes the formation of a measureable electric field. Here, we show that the same Ic,B definition of critical currents applies in the presence of an external applied magnetic field. In all experimental data presented here Ic,B is found to be significantly (10-30%) lower than Ic,E determined by the common electric field criterion of Ec = 1 microV/cm, and Ec to be up to 50 times lower at Ic,B than at Ic,E.
Article 0 Reads 0 Citations The onset of dissipation in high-temperature superconductors: magnetic hysteresis and field dependence E. F. Talantsev, N. M. Strickland, S. C. Wimbush, J. Brooks,... Published: 27 September 2018
Scientific Reports, doi: 10.1038/s41598-018-32811-6
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
Recently, we showed that the self-field transport critical current, Ic(sf), of a superconducting wire can be defined in a more fundamental way than the conventional (and arbitrary) electric field criterion, Ec = 1 μV/cm. We defined Ic(sf) as the threshold current, Ic,B, at which the perpendicular component of the local magnetic flux density, B⊥, measured at any point on the surface of a high-temperature superconducting tape abruptly crosses over from a non-linear to a linear dependence with increasing transport current. This effect results from the current distribution across the tape width progressively transitioning from non-uniform to uniform. The completion of this progressive transition was found to be singular. It coincides with the first discernible onset of dissipation and immediately precedes the formation of a measureable electric field. Here, we show that the same Ic,B definition of critical currents applies in the presence of an external applied magnetic field, Ba. In all experimental data presented here Ic,B is found to be significantly (10–30%) lower than Ic,E determined by the common electric field criterion of Ec = 1 µV/cm, and Ec to be up to 50 times lower at Ic,B than at Ic,E.
Article 0 Reads 0 Citations Influence of E–J Characteristics of Coated Conductors and Field Ramp-Up Rates on Shielding-Current-Induced Fields of Mag... Yang Li, Naoki Tominaga, Yusuke Sogabe, Takashi Kikuchi, Stu... Published: 01 April 2018
IEEE Transactions on Applied Superconductivity, doi: 10.1109/tasc.2017.2785817
DOI See at publisher website
Article 0 Reads 0 Citations AC Loss Characteristics in REBCO Coil Assemblies With Different Geometries and Conductors Yusuke Sogabe, Zhenan Jiang, Stuart C. Wimbush, Nicholas M. ... Published: 01 April 2018
IEEE Transactions on Applied Superconductivity, doi: 10.1109/tasc.2017.2783368
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Article 0 Reads 3 Citations A public database of high-temperature superconductor critical current data Stuart C. Wimbush, Nicholas M. Strickland Published: 01 June 2017
IEEE Transactions on Applied Superconductivity, doi: 10.1109/TASC.2016.2628700
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Article 0 Reads 1 Citation The magnetic-field dependence of the critical current: what we really need to know Nicholas M. Strickland, Stuart C. Wimbush Published: 01 June 2017
IEEE Transactions on Applied Superconductivity, doi: 10.1109/TASC.2016.2636561
DOI See at publisher website
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