Abstract
The margin of stability for high TC superconductors may be characterized by the lowest thermal pulse that results in a quench. A numerical code, developed to investigate this stability margin, accounts for the temperature dependence of the thermal conductivity, electrical resistivity and heat capacity of the materials involved. The conductor is cooled solely by thermal conduction along its length, and its stability is studied as function of the length. It is found that the stability margin for a pure BSCCO 2212 conductor is independent of the length. However, the stability margin for a composite conductor obtained by adding 10% (by volume) of silver to the BSCCO is found to be strongly length dependent. A transition length is identified, for which shorter lengths exhibit a dramatically higher stability margin. This feature results when the length dependent thermal diffusion time is shorter than the time required to determine the conductor’s stability. This study confirms and explains the growing awareness that if normal zones appear in high TC coils, they will remain fairly localized.
on leave from Rafael and Technion-Israeli Institute of Technology, Haifa, 3200 Israel
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© 1996 Plenum Press, New York
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Maytal, BZ., Yang, S., Waldrop, J., Pfotenhauer, J.M. (1996). On the Thermal Stability Length Dependence of High TC Superconductors. In: Kittel, P. (eds) Advances in Cryogenic Engineering. A Cryogenic Engineering Conference Publication, vol 41. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0373-2_72
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DOI: https://doi.org/10.1007/978-1-4613-0373-2_72
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