International Round Robin Test for Critical Current Measurement of RE-Ba-Cu-O Superconducting Tapes

Gen Nishijima, Kozo Osamura, Tatsuoki Nagaishi, Toru Fukushima, Yasuhiro Iijima, Tsutomu Koizumi, Yifei Zhang, Marco Breschi, Xavier Chaud, Hyung Seop Shin, Takanobu Kiss

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Abstract

VAMAS TWA 16 promoted an international round robin test (RRT) on critical current (Ic) measurement of RE-Ba-Cu-O (REBCO; RE = rare earth) superconductors to establish the transport I c measurement method in liquid nitrogen bath without an external magnetic field. Ten laboratories from five countries participated in the RRT and tested commercially available REBCO superconductors. Ic and measurement conditions were reported. In parallel, intrinsic Ic nonuniformity of the superconductors were evaluated by reel-to-reel scanning Hall-probe microscopy for 10-m conductors. Statistical analyses of Ic provided uncertainty of the measurement method. Combined standard uncertainty was analyzed considering the intrinsic nonuniformity of Ic. The analysis indicated that the intrinsic nonuniformity has the largest contribution to the uncertainty of Ic.

Original languageEnglish
Article number8279566
JournalIEEE Transactions on Applied Superconductivity
Volume28
Issue number4
DOIs
Publication statusPublished - Jun 2018

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All Science Journal Classification (ASJC) codes

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

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