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Title

Thermal conductance measurements of superconducting bi-2212 rods and a bi-2212-based current leadmodule

AuthorsNatividad, Eva CSIC ORCID; Castro, Miguel CSIC ORCID; Burriel, Ramón CSIC ORCID; Angurel, Luis A. CSIC ORCID
KeywordsCurrent lead
High-Tc superconductors
Longitudinal steady-state method
Thermal conductivity
Thermal losses
Thermal relaxation time
Issue DateMay-2006
PublisherSpringer
CitationJournal of Thermal Analysis and Calorimetry 84(2): 307-316 (2006)
AbstractWe 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.
Description10 pages, 7 figures, 1 table.
Publisher version (URL)http://dx.doi.org/10.1007/s10973-005-7293-4
URIhttp://hdl.handle.net/10261/19799
DOI10.1007/s10973-005-7293-4
ISSN1388-6150
E-ISSN1572-8943
Appears in Collections:(ICMA) Artículos

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