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Heat Flow at the Niobium-Superfluid Helium Interface: Kapitza Resistance and Superconducting Cavities

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Abstract

By measuring the temperature jump in the presence of a heat flux across niobium disks surrounded by He II, we determined the Kapitza resistance, R k, for different surface roughness and bulk purity. The experiments were conducted from 1.5 K to T λ, under saturated vapour pressure. The influence of foreign atoms due to the presence of Ti near the interface was also investigated. The importance of R k on the efficiency of superconducting cavities is discussed.

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Authors and Affiliations

  1. LIMSI-CNRS, B.P. 133, F-91403, Orsay, France

    J. Amrit & M. X. François

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  1. J. Amrit
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  2. M. X. François
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Amrit, J., François, M.X. Heat Flow at the Niobium-Superfluid Helium Interface: Kapitza Resistance and Superconducting Cavities. Journal of Low Temperature Physics 119, 27–40 (2000). https://doi.org/10.1023/A:1004604401306

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