1. The eta-beta model model: an alternative to the power-law model for numerical simulations of REBCO tapes
- Author
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Riva, Nicolò, Sirois, Frederic, Lacroix, Christian, Pellerin, Felix, Giguere, Jael, Grilli, Francesco, and Dutoit, B.
- Subjects
Superconductivity (cond-mat.supr-con) ,Condensed Matter - Superconductivity ,FOS: Physical sciences ,Physics - Applied Physics ,Applied Physics (physics.app-ph) ,Computational Physics (physics.comp-ph) ,Physics - Computational Physics - Abstract
When modeling superconducting devices based on REBCO tapes andworking near or above the critical current value (i.e. I> Ic), the power-law model is not always accurate. In our previous works, we proposed the overcritical current model, based on a combination of fast pulsed current measurements and finite elementan alysis. The overcritical current model was provided in the form of look-up tables and was validated experimentally. We showed that the overcritical current model could better reproduce experimental measurements than the power-law model, and that the power-law model predicts a faster quench than the overcritical current model. In this contribution, we propose the eta-beta model, a mathematical expression to model analytically the overcritical current model, based on measurements performed between 77 K and 90 K in self-field conditions. The proposed model is verified by comparing DC fault measurements with the results of numerical simulations using the eta-beta model to represent the electrical resistivity of the superconducting layer of REBCO tapes., 20 pages, 5 figures, 2 tables, journal paper
- Published
- 2021
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