Investigation of irregular coupling loss based on strand arrangement in large superconductor

利用研制的三维测量仪，成功地测量了线芯导线中的多股位置。测量数据表明，导线制造后，许多股线偏离了预期位置，形成线圈的接触点也发生了变形，与线圈相连的磁通是不规则的。在这种变形回路中，线圈产生的磁场变化引起了不规则的耦合损耗，并对其进行了定量分析。在建立绞线力学算法的基础上，估算了导线中的三维绞线位置。

Many strand locations in Cable-in-Conduit conductor were successfully measured, by using a developed 3 dimensional measurement instrument. Measured data shows that many strands are deviated from the expected positions after the conductor fabrication, and hence contacting points forming loops are also deformed from the expected positions and magnetic flux linked with the loops are irregular. Changing magnetic fields generated by a coil cause the irregular coupling losses in such deformed loops, and the loss was quantitatively analyzed. After formulating an algorism of strand mechanics, 3 dimensional strand locations in the conductor were estimated.