Thermal tests of 6 KA HTS current leads for the Tevatron

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Prototype current leads incorporating High Temperature Superconductor (HTS) elements have been tested at Fermilab. Fermilab's Tevatron includes about 50 pair of 5 to 6 kA current leads, and Fermilab is investigating the feasibility of replacing some of these conventional leads with HTS leads. The prototype HTS current leads are cooled primarily by a countercurrent flow of liquid nitrogen from the 80 K intercept to the warm end of the leads, but also a small flow of helium gas cools the HTS section from the 4 K level. The HTS current leads carried the design current of 5 kA with good ... continued below

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169 Kilobytes pages

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G. Citver, S. Feher, T. J. Peterson and C. D. Sylvester December 9, 1999.

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Prototype current leads incorporating High Temperature Superconductor (HTS) elements have been tested at Fermilab. Fermilab's Tevatron includes about 50 pair of 5 to 6 kA current leads, and Fermilab is investigating the feasibility of replacing some of these conventional leads with HTS leads. The prototype HTS current leads are cooled primarily by a countercurrent flow of liquid nitrogen from the 80 K intercept to the warm end of the leads, but also a small flow of helium gas cools the HTS section from the 4 K level. The HTS current leads carried the design current of 5 kA with good thermal and electrical stability. LN2 flow without current was 0.24 g/set per lead and with 5 kA was 0.53 g/set per lead, corresponding to heat inflows to the 80 K intercept of 46 Watts and 101 Watts, respectively. The heat input to the 4 K level was 0.6 W with no current and 0.7 W +/- 0.1 W per lead with 5 kA current, about 1/8 of the heat load via copper, vapor-cooled leads.

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169 Kilobytes pages

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  • Cryogenic Engineering Conference, 1999, Montreal, Quebec (CA), 07/13/1999--07/16/1999

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  • Report No.: FERMILAB-Conf-99/284
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 15038
  • Archival Resource Key: ark:/67531/metadc625066

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  • December 9, 1999

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  • June 16, 2015, 7:43 a.m.

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  • April 1, 2016, 6:01 p.m.

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G. Citver, S. Feher, T. J. Peterson and C. D. Sylvester. Thermal tests of 6 KA HTS current leads for the Tevatron, article, December 9, 1999; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc625066/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.