Electrical resistance of superconducting cable splices

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The electrical resistance of superconducting cable splices is known to be in the 10{sup -9} {Omega} range which to be measured conventionally would require the use of a micro voltmeter with a power supply capable of generating kilo Amperes plus a liquid helium cryostat with large power leads. Here we present a system for carrying on such measurements that requires besides the microvoltmeter a power supply capable of generating only up to 35 {Alpha} and a 152 mm diameter neck helium dewar using less than 25 liters per day after initial cool down. In this paper we describe the apparatus ... continued below

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10 p.

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Kuchnir, M. July 1, 1997.

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Description

The electrical resistance of superconducting cable splices is known to be in the 10{sup -9} {Omega} range which to be measured conventionally would require the use of a micro voltmeter with a power supply capable of generating kilo Amperes plus a liquid helium cryostat with large power leads. Here we present a system for carrying on such measurements that requires besides the microvoltmeter a power supply capable of generating only up to 35 {Alpha} and a 152 mm diameter neck helium dewar using less than 25 liters per day after initial cool down. In this paper we describe the apparatus and present the data taken with it in its first use which for data acquisition used just a chart recorder. The method is based in making the splice in a loop of cable, inducing a current in it and measuring its decay time constant. Generating high currents in superconductors by induction is not a new technique but the use of the decay constant of currents generated this way for the determination of minute electrical resistance seems novel to the author. Unexpected details in the results will be discussed.

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10 p.

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OSTI as DE98052978

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  • Joint cryogenic engineering conference and international cryogenic materials conference, Portland, OR (United States), 27 Jul - 1 Aug 1997

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  • Other: DE98052978
  • Report No.: FNAL/C--97/264
  • Report No.: CONF-970758--
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 607506
  • Archival Resource Key: ark:/67531/metadc696673

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  • July 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 1, 2016, 3:59 p.m.

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Kuchnir, M. Electrical resistance of superconducting cable splices, article, July 1, 1997; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc696673/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.