Thermometric measurements of the self-field losses in silver sheathed PbBi2223 multifilamentary tapes
Thermometric measurements of the self-field losses in silver sheathed PbBi2223 multifilamentary tapes
Self-field ac losses in Ag sheathed PbBi-2223 tapes were measured using a thermometric method, which determines the losses by measuring the temperature profile of a vacuum insulated sample, with both ends at a fixed temperature. In practice, the samples were placed in a vacuum capsule immersed in LIN bath. By minimizing the bath superheat, thermal emf and heating at the current contacts, a loss induced temperature increase as low as 2 mK was measured using a Si diode thermometer. With a typical sample length of 600 mm, self-held losses between 7×10 -6 W/m and 4×10-3 W/m were measured at different frequencies. The results are in good agreement with both the electric measurement and theoretical calculation. This provides the first independent confirmation that electric measurement with carefully placed voltage loops can give the true losses of the sample.
bismuth compounds, calcium compounds, eddy current losses, high-temperature superconductors, lead compounds, multifilamentary superconductors, silver, strontium compounds Non-contro
1658-1661
Mahdi, A.E.
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Hughes, T.
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Beduz, C.
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Yang, Y.
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Stoll, R.L.
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Sykulski, J.K.
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Haldar, P.
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Sokolowski, R.S.
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Power, A.
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1997
Mahdi, A.E.
8fc3a265-e137-4eab-a270-876bc30559b2
Hughes, T.
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Beduz, C.
2cbc6ece-3e8b-454b-86d6-3960596bd234
Yang, Y.
f2e3049f-3750-4497-ba13-7a9072f4b562
Stoll, R.L.
0c13c491-3227-4f2d-af17-c1371795a11b
Sykulski, J.K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb
Haldar, P.
dfbe9fb1-37dd-405c-867f-e9260f67e9fe
Sokolowski, R.S.
618d82ce-607a-4986-9627-94406cb55f16
Power, A.
57b6a1e8-a417-4aa8-902a-39edc3ff89e6
Mahdi, A.E., Hughes, T., Beduz, C., Yang, Y., Stoll, R.L., Sykulski, J.K., Haldar, P., Sokolowski, R.S. and Power, A.
(1997)
Thermometric measurements of the self-field losses in silver sheathed PbBi2223 multifilamentary tapes.
IEEE Transactions on Applied Superconductivity, 7 (2), .
(doi:10.1109/77.620896).
Abstract
Self-field ac losses in Ag sheathed PbBi-2223 tapes were measured using a thermometric method, which determines the losses by measuring the temperature profile of a vacuum insulated sample, with both ends at a fixed temperature. In practice, the samples were placed in a vacuum capsule immersed in LIN bath. By minimizing the bath superheat, thermal emf and heating at the current contacts, a loss induced temperature increase as low as 2 mK was measured using a Si diode thermometer. With a typical sample length of 600 mm, self-held losses between 7×10 -6 W/m and 4×10-3 W/m were measured at different frequencies. The results are in good agreement with both the electric measurement and theoretical calculation. This provides the first independent confirmation that electric measurement with carefully placed voltage loops can give the true losses of the sample.
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Published date: 1997
Keywords:
bismuth compounds, calcium compounds, eddy current losses, high-temperature superconductors, lead compounds, multifilamentary superconductors, silver, strontium compounds Non-contro
Organisations:
EEE
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Local EPrints ID: 253597
URI: http://eprints.soton.ac.uk/id/eprint/253597
ISSN: 1051-8223
PURE UUID: fcff6e4e-df8d-4161-98af-3fc2ac29bbe9
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Date deposited: 10 Oct 2003
Last modified: 12 Nov 2024 02:32
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Contributors
Author:
A.E. Mahdi
Author:
T. Hughes
Author:
C. Beduz
Author:
Y. Yang
Author:
R.L. Stoll
Author:
J.K. Sykulski
Author:
P. Haldar
Author:
R.S. Sokolowski
Author:
A. Power
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