Effect of Applied Pure Bending Strain on Critical Current for CuNb/Nb3Sn Superconducting Wires

T. Omura; H. Oguro; S. Awaji; K. Watanabe; M. Sugimoto; H. Tsubouchi

doi:10.1109/TASC.2016.2542979

Effect of Applied Pure Bending Strain on Critical Current for CuNb/Nb₃Sn Superconducting Wires

T. Omura, H. Oguro, S. Awaji, K. Watanabe, M. Sugimoto, H. Tsubouchi

High Field Laboratory for Superconducting Materials

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We have developed a CuNb-reinforced Nb₃Sn (CuNb/Nb₃Sn) wire. Critical current (I_c) of prebent CuNb/Nb₃Sn coils with various diameters was investigated in order to develop a Nb₃Sn superconducting magnet by a react-and-wind (RW) method. It was found that the prebending treatment enhances I_c of the small pure bending coil. In the small pure bending strain region, I_c of the prebent coil with over 96-mm outer diameter is larger than that of the as-reacted coil. However, the as-reacted coils exhibited large I_c in the large pure bending strain region. Calculated results on the basis of the perfect current transfer model with a neutral axis shift successfully indicated the enhancement behavior of I_c by pure bending strains. Hence, we can understand the relationship between coil diameter and prebending treatment for the RW method using CuNb/Nb₃Sn wires.

Original language	English
Article number	7434626
Journal	IEEE Transactions on Applied Superconductivity
Volume	26
Issue number	4
DOIs	https://doi.org/10.1109/TASC.2016.2542979
Publication status	Published - 2016 Jun

Keywords

Nb3Sn
critical current
prebent
pure bending strain

ASJC Scopus subject areas

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

Access to Document

10.1109/TASC.2016.2542979

Cite this

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title = "Effect of Applied Pure Bending Strain on Critical Current for CuNb/Nb3Sn Superconducting Wires",

abstract = "We have developed a CuNb-reinforced Nb3Sn (CuNb/Nb3Sn) wire. Critical current (Ic) of prebent CuNb/Nb3Sn coils with various diameters was investigated in order to develop a Nb3Sn superconducting magnet by a react-and-wind (RW) method. It was found that the prebending treatment enhances Ic of the small pure bending coil. In the small pure bending strain region, Ic of the prebent coil with over 96-mm outer diameter is larger than that of the as-reacted coil. However, the as-reacted coils exhibited large Ic in the large pure bending strain region. Calculated results on the basis of the perfect current transfer model with a neutral axis shift successfully indicated the enhancement behavior of Ic by pure bending strains. Hence, we can understand the relationship between coil diameter and prebending treatment for the RW method using CuNb/Nb3Sn wires.",

keywords = "Nb3Sn, critical current, prebent, pure bending strain",

author = "T. Omura and H. Oguro and S. Awaji and K. Watanabe and M. Sugimoto and H. Tsubouchi",

note = "Funding Information: This work was supported in part by the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University, under Project 15H0409 and in part by the Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science under KAKENHI 25246032. Publisher Copyright: {\textcopyright} 2002-2011 IEEE.",

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T1 - Effect of Applied Pure Bending Strain on Critical Current for CuNb/Nb3Sn Superconducting Wires

AU - Omura, T.

AU - Oguro, H.

AU - Awaji, S.

AU - Watanabe, K.

AU - Sugimoto, M.

AU - Tsubouchi, H.

N1 - Funding Information: This work was supported in part by the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University, under Project 15H0409 and in part by the Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science under KAKENHI 25246032. Publisher Copyright: © 2002-2011 IEEE.

PY - 2016/6

Y1 - 2016/6

N2 - We have developed a CuNb-reinforced Nb3Sn (CuNb/Nb3Sn) wire. Critical current (Ic) of prebent CuNb/Nb3Sn coils with various diameters was investigated in order to develop a Nb3Sn superconducting magnet by a react-and-wind (RW) method. It was found that the prebending treatment enhances Ic of the small pure bending coil. In the small pure bending strain region, Ic of the prebent coil with over 96-mm outer diameter is larger than that of the as-reacted coil. However, the as-reacted coils exhibited large Ic in the large pure bending strain region. Calculated results on the basis of the perfect current transfer model with a neutral axis shift successfully indicated the enhancement behavior of Ic by pure bending strains. Hence, we can understand the relationship between coil diameter and prebending treatment for the RW method using CuNb/Nb3Sn wires.

AB - We have developed a CuNb-reinforced Nb3Sn (CuNb/Nb3Sn) wire. Critical current (Ic) of prebent CuNb/Nb3Sn coils with various diameters was investigated in order to develop a Nb3Sn superconducting magnet by a react-and-wind (RW) method. It was found that the prebending treatment enhances Ic of the small pure bending coil. In the small pure bending strain region, Ic of the prebent coil with over 96-mm outer diameter is larger than that of the as-reacted coil. However, the as-reacted coils exhibited large Ic in the large pure bending strain region. Calculated results on the basis of the perfect current transfer model with a neutral axis shift successfully indicated the enhancement behavior of Ic by pure bending strains. Hence, we can understand the relationship between coil diameter and prebending treatment for the RW method using CuNb/Nb3Sn wires.

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