Determination of the thermal expansion of Nb3Sn superconducting composites by digital microimage processing

Yang Xu; Meirong Tu; Peter J. Gielisse

doi:10.1117/12.218166

1 September 1995 Determination of the thermal expansion of Nb₃Sn superconducting composites by digital microimage processing

Yang Xu, Meirong Tu, Peter J. Gielisse

Author Affiliations +

Proceedings Volume 2559, High-Temperature Microwave Superconductors and Applications; (1995) https://doi.org/10.1117/12.218166
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

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.

Citation Download Citation

Yang Xu, Meirong Tu, and Peter J. Gielisse "Determination of the thermal expansion of Nb₃Sn superconducting composites by digital microimage processing", Proc. SPIE 2559, High-Temperature Microwave Superconductors and Applications, (1 September 1995); https://doi.org/10.1117/12.218166

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