New application of temperature-dependent modelling of high temperature superconductors: quench propagation and pulse magnetization

Min Zhang, Koichi Matsuda, T. A. Coombs

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33 Citations (Scopus)

Abstract

We present temperature-dependent modeling of high-temperature superconductors (HTS) to understand HTS electromagnetic phenomena where temperature fluctuation plays a nontrivial role. Thermal physics is introduced into the well-developed H-formulation model, and the effect of temperature-dependent parameters is considered. Based on the model, we perform extensive studies on two important HTS applications: quench propagation and pulse magnetization. A micrometer-scale quench model of HTS coil is developed, which can be used to estimate minimum quench energy and normal zone propagation velocity inside the coil. In addition, we study the influence of inhomogeneity of HTS bulk during pulse magnetization. We demonstrate how the inhomogeneous distribution of critical current inside the bulk results in varying degrees of heat dissipation and uniformity of final trapped field. The temperature- dependent model is proven to be a powerful tool to study the thermally coupled electromagnetic phenomena of HTS.

Original languageEnglish
Article number043912
Number of pages8
JournalJournal of Applied Physics
Volume112
Issue number4
DOIs
Publication statusPublished - 15 Aug 2012

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Keywords

  • emperature-dependent modeling
  • igh-temperature superconductors (HTS)
  • electromagnetic phenomena
  • temperature fluctuation
  • quench propagation
  • pulse magnetization
  • quench energy
  • normal zone propagation velocity
  • inhomogeneity

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