Steady and unsteady current modes and thermal runaway conditions of high-TC composite superconductors

V. R. Romanovskii, K. Watanabe, S. Awaji, G. Nishijima

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Transport current properties of the steady and unsteady operating modes and thermal runaway conditions of the Ag-sheathed Bi2Sr 2CaCu2O8 composite superconductors are theoretically studied in DC magnetic fields. It is shown that the temperature of a composite is not equal to the coolant temperature before thermal runaway. As a result, the shape of the voltage-current characteristics of high-Tc superconducting composites has only a positive slope during continuous current charging both before and after thermal runaway. That is why the voltage-current characteristics of high-Tc superconductors do not define the boundary of the thermal runaway. This peculiarity has to be considered during experiments at which the critical or quench currents are defined.

Original languageEnglish
Pages (from-to)3133-3136
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume17
Issue number2
DOIs
Publication statusPublished - 2007 Jun 1

Keywords

  • Applied current
  • Composite superconductor
  • High temperature superconductors
  • Overheating
  • Thermal runaway

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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