Characterization of high jj nb3sn strands for the series-connected hybrid magnet

Jun Lu, Ke Han, Robert P. Walsh, Iain Dixon, Alexandre Ferrera, Bernd Seeber

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


The series-connected hybrid magnet under construction at the National High Magnetic Field Laboratory uses cable-in-conduit-conductor with high J c Nb3Sn strands. One of the candidate strands is made by the restacked-rod process with a nominal Jc of ̃ 2400 A/mm 2. We characterized the Jc as a function of axial and transverse strain, magnetic field and temperature. The Jc-strain measurements have been carried out by a straight pull device and two different Walters spring probes. In addition, we have investigated the effect of the reaction heat treatment temperature on the irreversible strain. We found that the irreversible strain increases with the heat treatment temperature. Our results indicate that, in addition to its high Jc, this type of strand has moderate strain sensitivity, therefore is suitable for the application of the series-connected hybrid magnet.

Original languageEnglish
Article number5152921
Pages (from-to)2615-2618
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number3
StatePublished - Jun 2009
Externally publishedYes


  • Critical current
  • NbSn
  • Strain


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