Recently, the Wang Qiuliang team of Institute of electrical engineering, Chinese Academy of Sciences has successfully developed a superconducting magnet with a central magnetic field of 32.35 Tesla (T). The magnet adopts the self-developed high-temperature inserted magnet technology, which breaks the world record of 32.0 Tesla superconducting magnet created by the national strong magnetic field laboratory of the United States in December 2017, marking that China's high field inserted magnet technology has reached the world's leading level.
Previously, the upper limit of the magnetic field intensity generated by low-temperature superconducting magnet was about 23.0 Tesla. This time, Wang Qiuliang's team designed and built a new superconducting coil and support structure, which improved the overall engineering current density and local safety margin of the coil, and adopted axial elastic support structure and binding device, which improved the ability of the superconducting joint to resist local tensile stress concentration, and greatly improved the electromagnetic safety margin and stress safety margin of the extremely high field inserted magnet.
After testing, the ultra-high magnetic field superconducting magnet produced the central magnetic field of 32.35 Tesla under the condition of liquid helium immersion, and realized the stable operation of 32.35 Tesla all superconducting magnet. Its key technical parameters have met the technical requirements of the national heavy science and technology basic implementation project of the comprehensive extreme conditions experimental device for extreme strong magnetic field.
It is reported that the research results will serve the users of the world-class comprehensive extreme condition experimental device, and provide the most advanced experimental conditions of strong magnetic field for the basic research and Application Research of China's material science, such as the exploration of new state of things, new phenomena and new laws.