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2008/04/07(Mon) 21:56

Primitive Design of a 22 T-φ 400 mm Room Temperature Bore Superconducting Outsert of a 50 T Hybrid Magnet
50Tハイブリドマグネット用22T- φ400mm

Schematic image of a 22 T - f440 mm superconducting outsert and high-strength CuNb/Nb3Sn strand cable with stress limit of 552 MPa at epb = 0.4 %. The critical current of Ic = 1000 A at 18.5 T and 2.0 K will be obtainable.

The next phase high-strength strand cables will consist of three CuNb/Nb3Sn strand wires (3 x f 1.73) and four stainless steel strand wires (4 x f 1.73 ) to withstand Hoop stress over 500 MPa. Using co-strand cables composed of repeatedly prebent CuNb/Nb3Sn wires and additional reinforcing wires, a 22 T superconducting magnet consisting of five layers of CuNb/Nb3Sn coils and two layers of NbTi coils, which will have coil parameters such as inner diameter f 440 mm, outer diameter f 1310 mm, coil height 1320 mm, inductance 330 H, and magnetic stored energy 165 MJ, will be obtainable as a wide bore superconducting outsert for a 50 T-class hybrid magnet near future.

IMR, Tohoku University: K. Watanabe, S. Awaji, G. Nishijima
Grad. School of Eng., Tohoku University: T. Hamajima
TML, National Institute for Materials Science: T. Kiyoshi
Toshiba Co.: S. Hanai, M. Ono

Reference: K. Watanabe, G. Nishijima, S. Awaji, K. Koyama, K. Takahashi, N. Kobayashi, T. Kiyoshi,
"Cryocooled superconducting magnets for high magnetic fields at the HFLSM and future collaboration with the TML, RHMF 2006", Sendai, submitted.

次世代高強度撚線ケーブルは,500MPa以上のフープ力を克服するために3本のCuNb/Nb3Sn撚線(3×f 1.73)と4本のステンレス補強撚線(4×f 1.73 )からなる予定である.繰り返し曲げ歪みを印加されたCuNb/Nb3Sn線材と補強ステンレス線材からなる共巻き撚線ケーブルを用いることで,5層のCuNb/Nb3Snコイルと2層のNbTiコイルからなる22T超伝導マグネットが50T級ハイブリッドマグネットの大口径超伝導外挿コイルとして近い将来に実現可能である.その時のコイルパラメータは,内径440mm,外径1310mm,コイル高さ1320mm,インダクタンス330H,蓄積エネルギー165MJとなる予定である.

東北大学金属材料研究所:渡辺和雄,西島 元,淡路 智
物質・材料研究機構強磁場共用ステーション:木吉 司
東芝:花井 哲,小野通隆