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Proceedings Paper

Determination of the thermal expansion of Nb3Sn superconducting composites by digital microimage processing
Author(s): Yang Xu; Meirong Tu; Peter J. Gielisse
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Paper Abstract

The thermal expansion of Nb3Sn superconducting composites has been investigated with newly developed electro-optical measurement technique. In this method, deformation of the sample is recorded with two CCD cameras equipped with long distance micro objective lenses. Image processing is accomplished with a high resolution frame grabber and an auxiliary high speed processor board. The linear thermal expansion data of two different samples are reported from room temperature down to 73 K. The results are compared with the linear thermal expansion of copper and Nb3Sn, the main components of the composite itself. The temperature dependence of (Delta) L/L at low temperature has been generated. A simple analytical method was used to evaluate the values of the mean thermal expansion coefficient ((alpha) ). Good agreement has been found between the experimental results and the analytically evaluated values.

Paper Details

Date Published: 1 September 1995
PDF: 7 pages
Proc. SPIE 2559, High-Temperature Microwave Superconductors and Applications, (1 September 1995); doi: 10.1117/12.218166
Show Author Affiliations
Yang Xu, Florida A&M Univ. and Florida State Univ. (United States)
Meirong Tu, Florida A&M Univ. and Florida State Univ. (United States)
Peter J. Gielisse, Florida A&M Univ. and Florida State Univ. (United States)

Published in SPIE Proceedings Vol. 2559:
High-Temperature Microwave Superconductors and Applications
James D. Hodge, Editor(s)

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