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H. Oguro - One of the best experts on this subject based on the ideXlab platform.

  • performance of a 14 t cunb nb3sn Rutherford coil with a 300 mm wide cold bore
    Superconductor Science and Technology, 2016
    Co-Authors: H. Oguro, Satoshi Awaji, Masahiro Sugimoto, Kazuo Watanabe, S Hanai, Shigeru Ioka, H. Tsubouchi
    Abstract:

    A large-bore 14-T CuNb/Nb3Sn Rutherford coil was developed for a 25 T cryogen-free superconducting magnet. The magnet consisted of a low-temperature superconducting (LTS) magnet of NbTi and Nb3Sn Rutherford coils, and a high-temperature superconducting magnet. The Nb3Sn Rutherford coil was fabricated by the react-and-wind method for the first time. The LTS magnet reached the designed operation current of 854 A without a training quench at a 1 h ramp rate. The central magnetic field generated by the LTS magnet was measured by a Hall sensor to be 14.0 T at 854 A in a 300 mm cold bore.

  • Development of Nb-Rod-Method Cu–Nb Reinforced Nb3Sn Rutherford Cables for React-and-Wind Processed Wide-Bore High Magnetic Field Coils
    IEEE Transactions on Applied Superconductivity, 2015
    Co-Authors: M. Sugimoto, K. Watanabe, H. Tsubouchi, S. Endoh, A. Takagi, S. Awaji, H. Oguro
    Abstract:

    We developed Cu-Nb reinforced Nb3Sn Rutherford cables for wide-bore high magnetic field coils that were able to be produced by React-and-Wind technique. The Cu-Nb/Nb3Sn strands were reinforced by internal Cu-20 vol%Nb composites fabricated by the Nb-rod-method and were manufactured through the bronze-process. The Rutherford cables composed of sixteen un-reacted Cu-Nb/Nb3Sn strands of 0.8-mm diameter were heat-treated at 670 °C for 96 hours. After that, repeated bending strains (pre-bending strains) were applied to the flatwise direction of the reacted Nb3Sn Rutherford cables at room temperature. Critical current (Ic) values of Cu-Nb/Nb3Sn strands extracted from the Rutherford cables were compared to those of the single strands that had undergone the same processing as the cables. Ic values under the applied tensile stress of the Rutherford cable were increased by the pre-bending treatment as similar to the single strand. The performances of Cu-Nb/Nb3Sn Rutherford cables were improved by utilization of the pre-bending process.

  • Development of Nb-Rod-Method Cu–Nb Reinforced Nb 3 Sn Rutherford Cables for React-and-Wind Processed Wide-Bore High Magnetic Field Coils
    IEEE Transactions on Applied Superconductivity, 2015
    Co-Authors: Masahiro Sugimoto, Satoshi Awaji, K. Watanabe, H. Tsubouchi, S. Endoh, A. Takagi, H. Oguro
    Abstract:

    We developed Cu-Nb reinforced Nb 3 Sn Rutherford cables for wide-bore high magnetic field coils that were able to be produced by React-and-Wind technique. The Cu-Nb/Nb 3 Sn strands were reinforced by internal Cu-20 vol%Nb composites fabricated by the Nb-rod-method and were manufactured through the bronze-process. The Rutherford cables composed of sixteen un-reacted Cu-Nb/Nb 3 Sn strands of 0.8-mm diameter were heat-treated at 670 °C for 96 hours. After that, repeated bending strains (pre-bending strains) were applied to the flatwise direction of the reacted Nb 3 Sn Rutherford cables at room temperature. Critical current (Ic) values of Cu-Nb/Nb 3 Sn strands extracted from the Rutherford cables were compared to those of the single strands that had undergone the same processing as the cables. I c values under the applied tensile stress of the Rutherford cable were increased by the pre-bending treatment as similar to the single strand. The performances of Cu-Nb/Nb 3 Sn Rutherford cables were improved by utilization of the pre-bending process.

H. Tsubouchi - One of the best experts on this subject based on the ideXlab platform.

  • performance of a 14 t cunb nb3sn Rutherford coil with a 300 mm wide cold bore
    Superconductor Science and Technology, 2016
    Co-Authors: H. Oguro, Satoshi Awaji, Masahiro Sugimoto, Kazuo Watanabe, S Hanai, Shigeru Ioka, H. Tsubouchi
    Abstract:

    A large-bore 14-T CuNb/Nb3Sn Rutherford coil was developed for a 25 T cryogen-free superconducting magnet. The magnet consisted of a low-temperature superconducting (LTS) magnet of NbTi and Nb3Sn Rutherford coils, and a high-temperature superconducting magnet. The Nb3Sn Rutherford coil was fabricated by the react-and-wind method for the first time. The LTS magnet reached the designed operation current of 854 A without a training quench at a 1 h ramp rate. The central magnetic field generated by the LTS magnet was measured by a Hall sensor to be 14.0 T at 854 A in a 300 mm cold bore.

  • Development of Nb-Rod-Method Cu–Nb Reinforced Nb3Sn Rutherford Cables for React-and-Wind Processed Wide-Bore High Magnetic Field Coils
    IEEE Transactions on Applied Superconductivity, 2015
    Co-Authors: M. Sugimoto, K. Watanabe, H. Tsubouchi, S. Endoh, A. Takagi, S. Awaji, H. Oguro
    Abstract:

    We developed Cu-Nb reinforced Nb3Sn Rutherford cables for wide-bore high magnetic field coils that were able to be produced by React-and-Wind technique. The Cu-Nb/Nb3Sn strands were reinforced by internal Cu-20 vol%Nb composites fabricated by the Nb-rod-method and were manufactured through the bronze-process. The Rutherford cables composed of sixteen un-reacted Cu-Nb/Nb3Sn strands of 0.8-mm diameter were heat-treated at 670 °C for 96 hours. After that, repeated bending strains (pre-bending strains) were applied to the flatwise direction of the reacted Nb3Sn Rutherford cables at room temperature. Critical current (Ic) values of Cu-Nb/Nb3Sn strands extracted from the Rutherford cables were compared to those of the single strands that had undergone the same processing as the cables. Ic values under the applied tensile stress of the Rutherford cable were increased by the pre-bending treatment as similar to the single strand. The performances of Cu-Nb/Nb3Sn Rutherford cables were improved by utilization of the pre-bending process.

  • Development of Nb-Rod-Method Cu–Nb Reinforced Nb 3 Sn Rutherford Cables for React-and-Wind Processed Wide-Bore High Magnetic Field Coils
    IEEE Transactions on Applied Superconductivity, 2015
    Co-Authors: Masahiro Sugimoto, Satoshi Awaji, K. Watanabe, H. Tsubouchi, S. Endoh, A. Takagi, H. Oguro
    Abstract:

    We developed Cu-Nb reinforced Nb 3 Sn Rutherford cables for wide-bore high magnetic field coils that were able to be produced by React-and-Wind technique. The Cu-Nb/Nb 3 Sn strands were reinforced by internal Cu-20 vol%Nb composites fabricated by the Nb-rod-method and were manufactured through the bronze-process. The Rutherford cables composed of sixteen un-reacted Cu-Nb/Nb 3 Sn strands of 0.8-mm diameter were heat-treated at 670 °C for 96 hours. After that, repeated bending strains (pre-bending strains) were applied to the flatwise direction of the reacted Nb 3 Sn Rutherford cables at room temperature. Critical current (Ic) values of Cu-Nb/Nb 3 Sn strands extracted from the Rutherford cables were compared to those of the single strands that had undergone the same processing as the cables. I c values under the applied tensile stress of the Rutherford cable were increased by the pre-bending treatment as similar to the single strand. The performances of Cu-Nb/Nb 3 Sn Rutherford cables were improved by utilization of the pre-bending process.

Masahiro Sugimoto - One of the best experts on this subject based on the ideXlab platform.

  • performance of a 14 t cunb nb3sn Rutherford coil with a 300 mm wide cold bore
    Superconductor Science and Technology, 2016
    Co-Authors: H. Oguro, Satoshi Awaji, Masahiro Sugimoto, Kazuo Watanabe, S Hanai, Shigeru Ioka, H. Tsubouchi
    Abstract:

    A large-bore 14-T CuNb/Nb3Sn Rutherford coil was developed for a 25 T cryogen-free superconducting magnet. The magnet consisted of a low-temperature superconducting (LTS) magnet of NbTi and Nb3Sn Rutherford coils, and a high-temperature superconducting magnet. The Nb3Sn Rutherford coil was fabricated by the react-and-wind method for the first time. The LTS magnet reached the designed operation current of 854 A without a training quench at a 1 h ramp rate. The central magnetic field generated by the LTS magnet was measured by a Hall sensor to be 14.0 T at 854 A in a 300 mm cold bore.

  • Development of Nb-Rod-Method Cu–Nb Reinforced Nb 3 Sn Rutherford Cables for React-and-Wind Processed Wide-Bore High Magnetic Field Coils
    IEEE Transactions on Applied Superconductivity, 2015
    Co-Authors: Masahiro Sugimoto, Satoshi Awaji, K. Watanabe, H. Tsubouchi, S. Endoh, A. Takagi, H. Oguro
    Abstract:

    We developed Cu-Nb reinforced Nb 3 Sn Rutherford cables for wide-bore high magnetic field coils that were able to be produced by React-and-Wind technique. The Cu-Nb/Nb 3 Sn strands were reinforced by internal Cu-20 vol%Nb composites fabricated by the Nb-rod-method and were manufactured through the bronze-process. The Rutherford cables composed of sixteen un-reacted Cu-Nb/Nb 3 Sn strands of 0.8-mm diameter were heat-treated at 670 °C for 96 hours. After that, repeated bending strains (pre-bending strains) were applied to the flatwise direction of the reacted Nb 3 Sn Rutherford cables at room temperature. Critical current (Ic) values of Cu-Nb/Nb 3 Sn strands extracted from the Rutherford cables were compared to those of the single strands that had undergone the same processing as the cables. I c values under the applied tensile stress of the Rutherford cable were increased by the pre-bending treatment as similar to the single strand. The performances of Cu-Nb/Nb 3 Sn Rutherford cables were improved by utilization of the pre-bending process.

Satoshi Awaji - One of the best experts on this subject based on the ideXlab platform.

  • performance of a 14 t cunb nb3sn Rutherford coil with a 300 mm wide cold bore
    Superconductor Science and Technology, 2016
    Co-Authors: H. Oguro, Satoshi Awaji, Masahiro Sugimoto, Kazuo Watanabe, S Hanai, Shigeru Ioka, H. Tsubouchi
    Abstract:

    A large-bore 14-T CuNb/Nb3Sn Rutherford coil was developed for a 25 T cryogen-free superconducting magnet. The magnet consisted of a low-temperature superconducting (LTS) magnet of NbTi and Nb3Sn Rutherford coils, and a high-temperature superconducting magnet. The Nb3Sn Rutherford coil was fabricated by the react-and-wind method for the first time. The LTS magnet reached the designed operation current of 854 A without a training quench at a 1 h ramp rate. The central magnetic field generated by the LTS magnet was measured by a Hall sensor to be 14.0 T at 854 A in a 300 mm cold bore.

  • Development of Nb-Rod-Method Cu–Nb Reinforced Nb 3 Sn Rutherford Cables for React-and-Wind Processed Wide-Bore High Magnetic Field Coils
    IEEE Transactions on Applied Superconductivity, 2015
    Co-Authors: Masahiro Sugimoto, Satoshi Awaji, K. Watanabe, H. Tsubouchi, S. Endoh, A. Takagi, H. Oguro
    Abstract:

    We developed Cu-Nb reinforced Nb 3 Sn Rutherford cables for wide-bore high magnetic field coils that were able to be produced by React-and-Wind technique. The Cu-Nb/Nb 3 Sn strands were reinforced by internal Cu-20 vol%Nb composites fabricated by the Nb-rod-method and were manufactured through the bronze-process. The Rutherford cables composed of sixteen un-reacted Cu-Nb/Nb 3 Sn strands of 0.8-mm diameter were heat-treated at 670 °C for 96 hours. After that, repeated bending strains (pre-bending strains) were applied to the flatwise direction of the reacted Nb 3 Sn Rutherford cables at room temperature. Critical current (Ic) values of Cu-Nb/Nb 3 Sn strands extracted from the Rutherford cables were compared to those of the single strands that had undergone the same processing as the cables. I c values under the applied tensile stress of the Rutherford cable were increased by the pre-bending treatment as similar to the single strand. The performances of Cu-Nb/Nb 3 Sn Rutherford cables were improved by utilization of the pre-bending process.

  • Rutherford flat cable composed of CuNb-reinforced Nb3Sn strands
    AIP Conference Proceedings, 2014
    Co-Authors: K. Watanabe, Hiroaki Kumakura, Satoshi Awaji, M. Sugimoto, Haruo Tsubouchi
    Abstract:

    A Rutherford flat cable that is applicable for operational currents up to 1000 A at 13-14 T was developed using a bronze-processed high-strength Nb3Sn strand with CuNb reinforcement (CuNb/Nb3Sn). The critical current for a 0.8- mm diameter CuNb/Nb3Sn strand is 98 A at 14 T and 4.2 K in the residual strain state. A test coil using the CuNb/Nb3Sn Rutherford flat cable composed of 16 CuNb-reinforced Nb3Sn strands was fabricated. We measured the critical current properties of the Rutherford test coil and obtained an excellent critical current of 1840 A at 14 T and 4.2 K. By using the strain gauges attached onto the stainless-steel reinforcement tape that was co-wounded with the Rutherford flat cable, it was found that a 300-MPa hoop stress at 4.2 K was applied to the CuNb/Nb3Sn strand. This implies that the critical current for a CuNb/Nb3Sn strand is enhanced to be 115 A at 14 T and 4.2 K through the stress-strain effect of the critical current at 300 MPa. [ABSTRACT FROM AUTHOR]

K. Watanabe - One of the best experts on this subject based on the ideXlab platform.

  • Development of Nb-Rod-Method Cu–Nb Reinforced Nb 3 Sn Rutherford Cables for React-and-Wind Processed Wide-Bore High Magnetic Field Coils
    IEEE Transactions on Applied Superconductivity, 2015
    Co-Authors: Masahiro Sugimoto, Satoshi Awaji, K. Watanabe, H. Tsubouchi, S. Endoh, A. Takagi, H. Oguro
    Abstract:

    We developed Cu-Nb reinforced Nb 3 Sn Rutherford cables for wide-bore high magnetic field coils that were able to be produced by React-and-Wind technique. The Cu-Nb/Nb 3 Sn strands were reinforced by internal Cu-20 vol%Nb composites fabricated by the Nb-rod-method and were manufactured through the bronze-process. The Rutherford cables composed of sixteen un-reacted Cu-Nb/Nb 3 Sn strands of 0.8-mm diameter were heat-treated at 670 °C for 96 hours. After that, repeated bending strains (pre-bending strains) were applied to the flatwise direction of the reacted Nb 3 Sn Rutherford cables at room temperature. Critical current (Ic) values of Cu-Nb/Nb 3 Sn strands extracted from the Rutherford cables were compared to those of the single strands that had undergone the same processing as the cables. I c values under the applied tensile stress of the Rutherford cable were increased by the pre-bending treatment as similar to the single strand. The performances of Cu-Nb/Nb 3 Sn Rutherford cables were improved by utilization of the pre-bending process.

  • Development of Nb-Rod-Method Cu–Nb Reinforced Nb3Sn Rutherford Cables for React-and-Wind Processed Wide-Bore High Magnetic Field Coils
    IEEE Transactions on Applied Superconductivity, 2015
    Co-Authors: M. Sugimoto, K. Watanabe, H. Tsubouchi, S. Endoh, A. Takagi, S. Awaji, H. Oguro
    Abstract:

    We developed Cu-Nb reinforced Nb3Sn Rutherford cables for wide-bore high magnetic field coils that were able to be produced by React-and-Wind technique. The Cu-Nb/Nb3Sn strands were reinforced by internal Cu-20 vol%Nb composites fabricated by the Nb-rod-method and were manufactured through the bronze-process. The Rutherford cables composed of sixteen un-reacted Cu-Nb/Nb3Sn strands of 0.8-mm diameter were heat-treated at 670 °C for 96 hours. After that, repeated bending strains (pre-bending strains) were applied to the flatwise direction of the reacted Nb3Sn Rutherford cables at room temperature. Critical current (Ic) values of Cu-Nb/Nb3Sn strands extracted from the Rutherford cables were compared to those of the single strands that had undergone the same processing as the cables. Ic values under the applied tensile stress of the Rutherford cable were increased by the pre-bending treatment as similar to the single strand. The performances of Cu-Nb/Nb3Sn Rutherford cables were improved by utilization of the pre-bending process.

  • Rutherford flat cable composed of CuNb-reinforced Nb3Sn strands
    AIP Conference Proceedings, 2014
    Co-Authors: K. Watanabe, Hiroaki Kumakura, Satoshi Awaji, M. Sugimoto, Haruo Tsubouchi
    Abstract:

    A Rutherford flat cable that is applicable for operational currents up to 1000 A at 13-14 T was developed using a bronze-processed high-strength Nb3Sn strand with CuNb reinforcement (CuNb/Nb3Sn). The critical current for a 0.8- mm diameter CuNb/Nb3Sn strand is 98 A at 14 T and 4.2 K in the residual strain state. A test coil using the CuNb/Nb3Sn Rutherford flat cable composed of 16 CuNb-reinforced Nb3Sn strands was fabricated. We measured the critical current properties of the Rutherford test coil and obtained an excellent critical current of 1840 A at 14 T and 4.2 K. By using the strain gauges attached onto the stainless-steel reinforcement tape that was co-wounded with the Rutherford flat cable, it was found that a 300-MPa hoop stress at 4.2 K was applied to the CuNb/Nb3Sn strand. This implies that the critical current for a CuNb/Nb3Sn strand is enhanced to be 115 A at 14 T and 4.2 K through the stress-strain effect of the critical current at 300 MPa. [ABSTRACT FROM AUTHOR]