Construction of a 25-T cryogen-free superconducting magnet

27th International Conference on Low Temperature Physics

Watanabe, K.^1 ; Awaji, S.^1 ; Oguro, H.^1 ; Tsuchiya, Y.^1 ; Hanai, S.^2 ; Miyazaki, H.^2 ; Tosaka, T.^2 ; Takahashi, M.^2 ; Ioka, S.^2

Institute for Materials Research, Tohoku University, Sendai

980-8577, Japan^1

Toshiba Corporation, Yokohama

230-0045, Japan^2

关键词: Background field;    Central magnetic field;    Coil Winding Processes;    Materials research;    New technologies;    Operation currents;    React-and-wind method;    Tohoku University;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/3/032019/pdf
DOI  :  10.1088/1742-6596/568/3/032019

来源: IOP

【 摘 要 】

The construction of a 25-T cryogen-free superconducting magnet (25T-CSM) has started in 2013 at the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University. The 25T-CSM consists of a low-T superconducting (LTS) coil and a high-Tcsuperconducting (HTS) coil. A high-strength CuNb/Nb3Sn Rutherford cable with the reinforcing stabilizer CuNb composite is adopted for the middle LTS section coil. The characteristic feature of the new technology using a CuNb/Nb3Sn Rutherford cable is a react-and-wind method for the coil-winding process. The LTS coil of 300-mm winding inner diameter is fabricated, and a central magnetic field of 14 T is generated at an operation current of 851 A. The HTS insert coil wound with GdBa2Cu3Oy(Gd123) tape has a 52-mm experimental room temperature bore, and a central magnetic field of 25.5 T will be generated at an operation current of 150 A in a background field of 14 T.