Comparative Measurements of ITER Nb3Sn Strands between Two Laboratories

Jun Lu*, Scott Hill, David McGuire, Keagan Dellinger, Arend Nijhuis, W. A. Wessel, H. J.G. Krooshoop, Kevin Chan, Nicolai Martovetsky

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
14 Downloads (Pure)


ITER Nb3Sn strand quality verification tests require large quantities of precise measurements. Therefore, regular cross-checking between testing laboratories is critically important. In this paper, we present results from a cross-checking test of 140 samples between the National High Magnetic Field Laboratory, USA, and the University of Twente, The Netherlands. The tests comprise measurements at 4.2 K on critical current, residual resistance ratio, and hysteresis loss, while at room temperature the chromium layer thickness, Cu/non-Cu ratio, filament twist pitch, and diameter were determined. Our results show very good agreement between the two laboratories. The reasons for small random discrepancies are discussed.

Original languageEnglish
Article number7883860
JournalIEEE transactions on applied superconductivity
Issue number5
Publication statusPublished - 1 Aug 2017


  • Critical current
  • hysteresis loss
  • Nb3Sn
  • residual resistance ratio (RRR)
  • 22/4 OA procedure


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