Finite Element Method Based Estimation of Critical Current Density of NbTi

Joonas Vesa, Valtteri Lahtinen, Paavo Rasilo

Research output: Contribution to journalArticle


The purpose of this paper is to estimate the magnetic field dependent critical current density scaling relation of NbTi used in a superconducting wire. The estimation problem is set using a finite element method based forward model solving the critical current of a wire in external magnetic fields. A sensitivity analysis is carried out to reveal the uncertainties in the process. It is shown that the methods provide accurate predictions of critical currents in a wire, but there are uncertainties related to the zero-field critical current density of the material.

Original languageEnglish
JournalIEEE Transactions on Applied Superconductivity
Issue number8
Publication statusE-pub ahead of print - 1 Jan 2020
MoE publication typeA1 Journal article-refereed


  • Estimation
  • Inverse problem
  • Material identification
  • NbTi
  • Scaling relation
  • Superconductor

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