Yesterday, good news came from Hefei Science Island, Anhui! The national steady-state strong magnetic field experimental device developed by the High Magnetic Field Science Center of the Hefei Institute of Physical Sciences, Chinese Academy of Sciences has reached the peak of science and technology. Its hybrid magnet (magnet diameter 32 mm) produces a stable magnetic field of 452,200 Gauss (i.e. 45.22 Tesla). The state magnetic field has set a new world record for the same type of magnet and has become the highest stable magnetic field in the world that can support scientific research. The original world record of was set by the National High Magnetic Field Laboratory in the United States in 1999. Its hybrid magnet produced 450,000 Gauss. This record has been held for 23 years.
html How high is the magnetic field of 1.4522 million Gauss? For example, the earth's magnetic field is approximately equal to 0.5 Gauss, and 452,200 Gauss is equivalent to more than 900,000 times the earth's magnetic field.
The national steady-state strong magnetic field experimental device is a major scientific and technological infrastructure project approved by the National Development and Reform Commission during the "Eleventh Five-Year Plan" period (also known as a "big scientific device"). It includes 10 magnets, 5 water-cooled magnets and 4 superconducting magnets. Magnets and 1 hybrid magnet. Among them, the hybrid magnet is the most technically difficult magnet in the world, and it is also the magnet that can generate the highest stable magnetic field. From a structural point of view, it is composed of an outer "superconducting magnet" and an inner "water-cooled magnet".
In 2016, the strong magnetic field team independently developed a hybrid magnet with a center field strength of 400,000 Gauss, ranking second in the world. The team's pursuit of innovation and scaling new heights has never stopped. With the support of the Hefei Comprehensive National Science Center's strong optical and magnetic pre-research project, after more than five years of intense technical research, the strong magnetic field team innovated the magnet structure and developed a new materials, optimized manufacturing processes, and finally achieved a major technological breakthrough. The hybrid magnet of the national steady-state strong magnetic field experimental device produced a steady-state strong magnetic field of 452,200 Gauss under a power supply of 26.9 megawatts, reaching the international leading level and becoming an important factor in the construction of extreme conditions for scientific experiments in my country and even the development of strong magnetic field technology in the world. milestone.
Steady-state strong magnetic field is an extreme experimental condition required for material scientific research, and is a "sharp tool" to promote major scientific discoveries. In a strong magnetic field experimental environment, material properties will be controlled, which is conducive to scientists discovering new phenomena of matter and exploring new laws of matter. The world's technological powers have always attached great importance to the construction of strong magnetic field experimental conditions. Currently, there are five stable strong magnetic field laboratories in the world, located in the United States, France, , the Netherlands, , Japan, and China's Hefei Science Island.
The national steady-state strong magnetic field experimental device has been running for more than 500,000 machine hours since it was put into operation, providing experimental conditions for more than 170 units at home and abroad, including Tsinghua University , Peking University , University of Science and Technology of China , Fudan University , Nanjing University , Zhejiang University , Institute of Physics, Chinese Academy of Sciences , Institute of High Energy , Institute of Electrical Engineering, Institute of Semiconductors, Harvard University in the United States, National University of Singapore, Max Planck Institute in Germany and other device users, in physics It has conducted cutting-edge research on more than 3,000 topics in the fields of chemistry, materials, life and health, and engineering technology, and achieved a series of major scientific and technological achievements, such as the first discovery of the three-dimensional quantum Hall effect caused by the Weyl orbit, and the revelation that sunlight exposure improves learning and memory. molecular and neural circuit mechanisms, etc. At the same time, the results derived from the R&D device and many achievements based on device research, such as combined scanning probe microscopy technology, national Class I anti-cancer innovative targeted drugs, etc., have been successfully transformed into real productivity.
The hybrid magnet of the National Steady-State Strong Magnetic Field Experimental Facility produces the world's highest steady-state magnetic field, which has greatly improved the experimental conditions that support scientists in conducting material scientific research, and will play an indispensable role in research on low-power electronic materials key role.
Although my country's strong magnetic field laboratory started late, in just more than ten years, achieved a key leap from scratch, from following to leading the way, creating the "China speed" in the development of strong magnetic technology. "!
(Guangming Daily all-media reporter Chang He Ding Yiming)
