Recently, learned from the Chinese Academy of Sciences electrician, the Institute of superconducting magnets and strong magnetic field applications in the country's major infrastructure, "steady-state strong magnetic field device" project, the use of liquid helium conduction cooling magnet technology, successfully developed a domestic The first high-field superconducting magnet system with a large cross-bore "cross-hole" produces a constant magnetic field of 8 to 10 T in a "cross-hole hot hole" (100 mm diameter) with both horizontal and vertical directions.
According to reports, a "cross cross hole" structure of the superconducting magnet with a split gap of 134mm electromagnetic structure, the coil maximum magnetic field of 13.5T, split the gap between the electromagnetic attraction of the coil up to 235 tons. In order to overcome the influence of the huge electromagnetic force of the superconducting coil on the superconductivity in the large split gap, the mechanical structure and heat transfer structure of the superconducting magnet are optimized, and the optimal design scheme of the electromagnetic-stress-heat transfer structure is obtained. The entire superconducting magnet system cooling load up to 1 ton, the use of conduction cooling technology successfully achieved the cooling capacity of large and complex structure of the cooling temperature dropped to 3.8K ultra-low temperature to ensure the stable operation of superconducting magnet system, get rid of the superconducting magnet The system relies on liquid helium, liquid nitrogen, etc.
Researchers pointed out that with the "cross cross hole" structure of large-diameter high-field superconducting magnet, not only to provide users with a large field of application of strong magnetic field, but also for real-time observation of the sample test conditions provide the conditions are widely used Materials processing, magneto-optical and magnetism and other fields of exploration and research.
Recently, the system has passed the test acceptance of the expert group, the indicators have reached the design requirements. The large caliber cross-hole hot hole high-field superconducting magnet system developed by the Chinese Academy of Sciences and Institute of Electrical Engineering marks that the technology of designing and manufacturing high-field superconducting magnet with complex structure in China has entered the international advanced ranks.
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