Characterization of Critical Current Distribution in Roebel Cable Strands Based on Reel-to-Reel Scanning Hall-Probe Microscopy

Kohei Higashikawa, Xiang Guo, Masayoshi Inoue, Zhenan Jiang, Rodney Badcock, Nicholas Long, Takanobu Kiss

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

We have characterized the local critical current distribution in 2-mm-wide Roebel cable strands using reel-to-reel scanning Hall-probe microscopy (RTR-SHPM). Roebel cable is an equally transposed cable formed from coated conductor architectures that is promising for large current applications. Local spatial critical-current uniformity becomes a crucial issue for the thermal stability of high-current windings. In general, the one-dimensional longitudinal critical-current distribution in coated conductors has been characterized by TAPESTAR as a de-facto standard method. However, it has proved to be difficult to use this method to achieve sufficient quality control of Roebel strands because of the unavailability of information on current flow across the width at a transposition. Furthermore, the lack of spatial resolution across the width becomes a problem for narrower strands. In this study, we applied RTR-SHPM for the characterization of Roebel strands. By scanning a Hall senor across the width of a conductor that was moving in a longitudinal direction, a high spatial-resolution two-dimensional distribution of magnetic field can be obtained for long-length conductors. This enabled us to estimate the local critical current, including the dependence on effective strand width, as a function of a longitudinal coordinate. This information is critical to the optimization of the fabrication processes and for nondestructive quality assurance of long-length Roebel strands.

元の言語英語
記事番号7782343
ジャーナルIEEE Transactions on Applied Superconductivity
27
発行部数4
DOI
出版物ステータス出版済み - 6 1 2017

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Critical currents
current distribution
strands
cables
critical current
Microscopic examination
Cables
microscopy
Scanning
scanning
probes
conductors
spatial resolution
Quality assurance
Quality control
Thermodynamic stability
assurance
Magnetic fields
quality control
Fabrication

All Science Journal Classification (ASJC) codes

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

これを引用

Characterization of Critical Current Distribution in Roebel Cable Strands Based on Reel-to-Reel Scanning Hall-Probe Microscopy. / Higashikawa, Kohei; Guo, Xiang; Inoue, Masayoshi; Jiang, Zhenan; Badcock, Rodney; Long, Nicholas; Kiss, Takanobu.

:: IEEE Transactions on Applied Superconductivity, 巻 27, 番号 4, 7782343, 01.06.2017.

研究成果: ジャーナルへの寄稿記事

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