Development of high superconductor fraction Bi2 Sr 2CaCu2Ox/Ag wire for MRI

W. T. Nachtrab, C. V. Renaud, T. Wong, X. T. Liu, T. M. Shen, U. P. Trociewitz, J. Schwartz

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


B12212 round multifilament wire has good potential for MRI systems designed to operate at 20 K and produce fields greater than 1.5 T. However, B12212 conductor is expensive largely due to the costs associated with materials and fabrication. To reduce the cost, we are investigating single restack designs. This approach reduces the silver fraction. It also reduces the amount of processing needed to make the conductor. However, a single restack limits the minimum filament diameter that can be achieved since the strain space is more limited. In this work we evaluated 4 conductor configurations to determine the effects of fill-factor, filament diameter, and s/d on Je and n value. It was found that a reduction in filament size has a greater effect on J e and n value than a corresponding increase in fill-factor. Some guidelines for optimization of conductor design are developed.

Original languageEnglish (US)
Article number4515943
Pages (from-to)1184-1187
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number2
StatePublished - Jun 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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