Development of Superconducting Joints for TWC High-Jc Nb3Sn Wires for NMR Superconducting Magnet Applications

  • G. Liang
  • J. Zeigler
  • L. Crowe
  • J. Hunter
  • T. Mann
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 44)

Abstract

For a persistent mode high-field NMR magnet involving several Nb3Sn coils, Nb3Sn-Nb3Sn joints with extremely small resistance values are required to maintain an acceptable field-decay rate. We have successfully developed a very reliable superconducting joining technique for Teledyne Wah Chang (TWC) high critical current-density (high-J c), niobium diffusion barrier modified jelly roll (MJR) Nb3Sn wires. In this paper, the joint fabrication and test results are presented. The range of the electric resistance of the Nb3Sn-Nb3Sn joints fabricated is about 10-14 Ohms (Ω) for currents up to 500 A and less than 6 × 10-14 Ω for currents up to 1000 A in a field of about 0.03 Tesla generated by the test coil. Both the standard four-terminal and field-decay methods were used for the measurements of joint resistance. Four joints have been tested and the success rate of the tested joints is 100%.

Keywords

Hall Probe Magnet Application Joint Resistance Model Coil Test Coil 
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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References

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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • G. Liang
    • 1
    • 2
  • J. Zeigler
    • 1
  • L. Crowe
    • 1
  • J. Hunter
    • 1
  • T. Mann
    • 1
  1. 1.Houston Advanced Research CenterThe WoodlandsUSA
  2. 2.Department of Physics, Sam Houston State UniversityHuntsvilleUSA

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