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Título: | Thermal conductance measurements of superconducting bi-2212 rods and a bi-2212-based current leadmodule |
Autor: | Natividad, Eva CSIC ORCID; Castro, Miguel CSIC ORCID; Burriel, Ramón CSIC ORCID; Angurel, Luis A. CSIC ORCID | Palabras clave: | Current lead High-Tc superconductors Longitudinal steady-state method Thermal conductivity Thermal losses Thermal relaxation time |
Fecha de publicación: | may-2006 | Editor: | Springer Nature | Citación: | Journal of Thermal Analysis and Calorimetry 84(2): 307-316 (2006) | Resumen: | We measured from 5 to 300 K the thermal conductance of different superconducting Bi-2212 thin rods and one superconducting module integrating a hybrid current lead based on such rods. The conductance values of the rods are lower than the measurable limits of the set-up and a detailed evaluation of the heat losses is required. The analysis of the heat exchanges permits to introduce a correction function to the measured values and allows to study low thermal conductivity materials. The dependence of the thermal conductivity of Bi-2212 rods on the sample microstructure is analyzed after this correction. We calculate analytically the time required to reach the steady-state for long bars for which extended relaxation times are expected. From the measured conductance data we estimate the heat load introduced by the current lead into a cryogenic bath in static conditions. | Descripción: | 10 pages, 7 figures, 1 table. | Versión del editor: | http://dx.doi.org/10.1007/s10973-005-7293-4 | URI: | http://hdl.handle.net/10261/19799 | DOI: | 10.1007/s10973-005-7293-4 | ISSN: | 1388-6150 | E-ISSN: | 1572-8943 |
Aparece en las colecciones: | (ICMA) Artículos |
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