Prediction of burnout of a conduction-cooled BSCCO current lead

A one-dimensional heat conduction model is employed to predict burnout of Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/ current lead. The upper end of the lead is assumed to be at 77 K and the lower end is at 4 K. The results show that burnout always occurs at the warmer end of the lead. The lead reaches it...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 1997-06, Vol.7 (2), p.696-699
Main Authors: Seol, S.Y., Cha, Y.S., Niemann, R.C., Hull, J.R.
Format: Article
Language:English
Subjects:
Applied sciences
Bismuth compounds
Electric connection. Cables. Wiring
Electrical engineering. Electrical power engineering
Exact sciences and technology
Heat engines
Heat transfer
High temperature superconductors
Laboratories
Mechanical engineering
Resistance heating
Superconductivity
Thermal conductivity
USA Councils
Various equipment and components
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Summary:A one-dimensional heat conduction model is employed to predict burnout of Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/ current lead. The upper end of the lead is assumed to be at 77 K and the lower end is at 4 K. The results show that burnout always occurs at the warmer end of the lead. The lead reaches its burnout temperature in two distinct stages. Initially, the temperature rises slowly when part of the lead is in flux-flow state. As the local temperature reaches the critical temperature, it begins to increase sharply. Burnout time depends strongly on flux-flow resistivity.
ISSN:1051-8223
1558-2515
DOI:10.1109/77.614599