Design Chart of Optimum Current Leads

  • K. Ishibashi
  • K. Maehata
  • A. Katase
  • M. Wake
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 31)

Abstract

The heat flow through current leads is one of major heat losses in a superconducting magnet system. To reduce the heat flow, current leads have been optimized in a complex way by varying such quantities as conductor length, cross-sectional area, heat transfer coefficient and cooling perimeter. Therefore, this study is made to simplify the design procedure, and to explain the general characteristics of the current leads. A new combined parameter which takes turbulent flow into account is introduced in the present work to enable us to draw a useful design chart. This chart gives, to a wide variety of current leads, detailed information about the optimum design-viz. geometric dimensions, heat flow into liquid helium, and pressure drop of the cooling gas. Change of the cross-sectional area along the conductor may improve the current lead performance. The effects of this area change are examined in detail.

Keywords

Helium Boiling Refrigeration 

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Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • K. Ishibashi
    • 1
  • K. Maehata
    • 1
  • A. Katase
    • 1
  • M. Wake
    • 2
  1. 1.Department of Nuclear EngineeringKyushu UniversityHakozaki, FukuokaJapan
  2. 2.National Laboratory for High Energy Physics (KEK)Oho-machi, IbarakiJapan

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