Probing the temperature during switching of YBCO films

A. Lehner, A. Heinrich, K. Numssen, H. Kinder

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


The switching of YBCO thin films under high current load is fundamental for fault current limiters and active power switches. Its mechanism is still under debate, however, with thermal and nonthermal models being discussed. To clarify the situation, we have placed an array of thermometers directly on top of a YBCO strip and have measured the quench propagation with high spacio-temporal resolution. We compare the results with a numerical model of heat diffusion in 3D with temperature dependent material parameters and find nearly quantitative agreement. This confirms thermal runaway as the mechanism of switching.

Original languageEnglish
Pages (from-to)1619-1621
Number of pages3
JournalPhysica C: Superconductivity and its Applications
StatePublished - Aug 2002


  • Fault current limiters
  • Switching mechanism
  • YBCO thin films


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