High-temperature superconducting current lead incorporating operation in the current-sharing mode

Yukikazu Iwasa, Haigun Lee

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

This paper describes a high-temperature superconducting (HTS) current lead, in which, over a short length at the warm end (e.g., 80 K), the lead, comprised of paralleled BSCCO-2223/Ag-Au tapes, is operated in the current-sharing mode. Because our leads rely on cooling by the effluent helium vapor, they are applicable only to devices such as superconducting magnets that operate in a bath of liquid helium. The current-sharing mode operation results in a significant saving of the superconducting materials (BSCCO, Ag, and Au) needed to construct our leads as compared with a `fully-superconducting' HTS lead of the same configuration that is rated for the same transport current and operates over the same temperature range. Detailed analysis of our four leads, each rated 6-kA and comprised of 240 paralleled BSCCO-2223/Ag-Au tapes, demonstrates that the cold-end heat input of each of our leads is equal to or can be optimized to be smaller than that of a completely superconducting counterpart comprised of 480 paralleled tapes. The paper also shows that a protection criterion under fault mode or heat exchange consideration ultimately determines the extent to which the material saving can be achieved in our leads.

Original languageEnglish
Pages (from-to)209-219
Number of pages11
JournalCryogenics
Volume40
Issue number3
DOIs
Publication statusPublished - 2000 Mar 1
Externally publishedYes

Fingerprint

Tapes
Helium
Lead
tapes
Superconducting magnets
heat
Temperature
Superconducting materials
Effluents
effluents
superconducting magnets
Vapors
liquid helium
Cooling
baths
helium
Liquids
vapors
cooling
configurations

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

High-temperature superconducting current lead incorporating operation in the current-sharing mode. / Iwasa, Yukikazu; Lee, Haigun.

In: Cryogenics, Vol. 40, No. 3, 01.03.2000, p. 209-219.

Research output: Contribution to journalArticle

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