China's first large-diameter cross-hole temperature hole high-field superconducting magnet system was successfully developed

[China Instrument Network Instrument R&D] A few days ago, learned from the Institute of Electrical Engineering of the Chinese Academy of Sciences that the Institute of Superconducting Magnets and High Magnetic Field Application Research was conducted without liquid helium-conducting cooling under the support of the “Stated Strong Magnetic Field Device” project of a major national basic science facility. Magnet technology successfully developed the first high-caliber superconducting magnet system with a large-diameter “cross-over temperature hole” in the country, which can produce 8~ in the “cross-over temperature hole” (100mm diameter) with both horizontal and vertical directions. 10T constant magnetic field.

According to reports, a superconducting magnet with a “cross-over temperature” structure has an electromagnetic structure with a crack gap of 134 mm. The maximum magnetic field in the coil is 13.5 T. The electromagnetic attraction between the coils in the split gap can reach 235 tons. In order to overcome the influence of the large electromagnetic force of superconducting coils in the large splitting gap on the superconductivity, the mechanical structure and heat transfer structure of the superconducting magnet were optimized, and the optimal electromagnetic-stress-heat transfer structure integrated design scheme was obtained. The cooling load of the entire superconducting magnet system reaches 1 ton, and the conduction cooling technology is successfully used to reduce the temperature of the cooling load of large-scale and complex structures to 3.8 K ultra-low temperature, which ensures the stable operation of the superconducting magnet system and frees the superconducting magnet. The system's dependence on liquid helium, liquid nitrogen, etc.

Scientists pointed out that large-diameter high-field superconducting magnets with “cross-over temperature” structure can not only provide users with a large application space for strong magnetic fields, but also provide conditions for real-time observation of sample testing processes, and are widely used. Materials handling, magneto-optics and magnetic chemistry and other areas of exploration and research.

Recently, the system has passed the test and acceptance by the expert group, and all the indicators have reached the design requirements. The large-caliber “Cross Hole Warm Hole” high field superconducting magnet system successfully developed by the Institute of Electrical Engineering of the Chinese Academy of Sciences indicates that China’s technology for designing and manufacturing high-field superconducting magnets in complex structures has entered the international advanced ranks.

(Original Title: Scientists Develop Large-Aperture Cross-Cross Temperature Hole Super Field Magnets)