The Influence of Bending Strain on the Critical Current of Strands
作者： Rosario Viola , Luigi Muzzi , Valentina Corato
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摘要: The effect of bending strain on the transport proper- ties strands has been object several investigations in last years. We report performances internal tin with different filament twist pitches, pre-com- pressed by swaging into thin stainless steel tubes before reaction heat treatment and subject to pure strain. have previously reported comparison between perfor- mances technological OST-Dipole strand (TW-strand) those same strand, but untwisted superconducting fila- ments (UNTW-strand). critical current, as well n-index samples twisted filaments gradually degraded applied strain, while an enhancement observed UNTW-strands. Here, results further experimental measurements carried out OKSC pitches are discussed, order clarify some aspects current transfer process within strands. Finally, we analysis through second derivative V-I curve, which evidenced a peaked cur- rent distribution for UNTW-strands, TW-strands under showed higher degree non-homogeneity, proven broader distributions.
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