Analysis of current distribution in a large superconductor

Takataro Hamajima, A. K.M. Alamgir, Naoyuki Harada, Makoto Tsuda, Michitaka Ono, Hirohisa Takano

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


An imbalanced current distribution which is often observed in cable-in-conduit (CIC) superconductors composed of multistaged, triplet type sub-cables, can deteriorate the performance of the coils. It is, hence very important to analyze the current distribution in a superconductor and find out methods to realize a homogeneous current distribution in the conductor. We apply magnetic flux conservation in a loop contoured by electric center lines of filaments in two arbitrary strands located on adjacent layers in a coaxial multilayer superconductor, and thereby analyze the current distribution in the conductor. A generalized formula governing the current distribution can be described as explicit functions of the superconductor construction parameters, such as twist pitch, twist direction and radius of individual layer. We numerically analyze a homogeneous current distribution as a function of the twist pitches of layers, using the fundamental formula. Moreover, it is demonstrated that we can control current distribution in the coaxial superconductor.

Original languageEnglish
Pages (from-to)729-736
Number of pages8
Issue number11
Publication statusPublished - 2000
Externally publishedYes


  • Cable-in-conduit conductors
  • Coaxial multilayer conductors
  • Electromagnetic phenomena
  • Homogeneous current distributions
  • Superconducting cables

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)


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