Electrical Resistance of Superconducting Cable Splices

  • M. Kuchnir
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 44)

Abstract

The electrical resistance of superconducting cable splices is known to be in the 10-9 Ω 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 A 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.

Keywords

Large Hadron Collider Decay Constant Decay Time Constant Primary Coil Coil Form 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • M. Kuchnir
    • 1
  1. 1.Fermi National Accelerator LaboratoryBataviaUSA

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