Development of an experimental system for characterization of high-temperature superconductors cooled by liquid hydrogen under the external magnetic field

11th European Conference on Applied Superconductivity

Tatsumoto, H.^1 ; Shirai, Y.^2 ; Shiotsu, M.^2 ; Naruo, Y.^3 ; Kobayashi, H.^3 ; Inatani, Y.^3

J-PARC Center, Japan Atomic Energy Agency, Ibaraki-Tokai, Japan^1

Department of Energy Science and Technology, Kyoto University, Kyoto, Japan^2

Institute of Space and Astronautical Science, JAXA, Kanagawa, Japan^3

关键词: Electrical devices;    Electromagnetic properties;    Experimental system;    Explosion-proof rooms;    External magnetic field;    High Tc superconductors;    Liquid hydrogens;    Stray magnetic fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/2/022042/pdf
DOI  :  10.1088/1742-6596/507/2/022042

来源: IOP

【 摘 要 】

An experimental system has been developed to investigate electro-magnetic properties of high-Tc superconductors cooled by liquid hydrogen under the external magnetic field of up to 7 T. A LH2cryostat is concentrically mounted on the inside of a LHe cryostat to cool a NbTi superconducting magnet. The experimental system is installed in an explosion-proof room. Explosion proof electrical devices are used and current leads are covered with an enclosure filled with nitrogen gas. A remote control system has been developed. Furthermore, the effects of stray magnetic field on the existing and the new devices are investigated and electro-magnetic shielding panels and enclosure made of iron were designed. It is confirmed through the cryogenic test that the experimental system meets the design requirements.