Chinese researchers have achieved a significant scientific milestone by generating a stable magnetic field of 35.1 teslas, establishing a new world record. This groundbreaking achievement, realized with an all-superconducting magnet, is set to accelerate the commercialization of advanced superconducting scientific instruments and provide critical support for cutting-edge fields such as fusion energy and aerospace. The record-breaking magnet was a collaborative effort involving the Institute of Plasma Physics of the Chinese Academy of Sciences (ASIPP), the Hefei International Center for Applied Superconductivity, the National Synchrotron Radiation Laboratory of the Hefei National Comprehensive Science Center, and Tsinghua University. This advancement surpasses the previous world record of 32.35 tesla.
The team successfully navigated complex challenges, including managing stress concentration, shielding current effects, and multi-field coupling under extreme low-temperature and high-field conditions. These innovations have significantly enhanced the magnet's mechanical stability and electromagnetic performance. During the experiment, the magnet reached 35.1 teslas and maintained stability for a full 30 minutes before being safely demagnetized, demonstrating the reliability of the developed technical approach. The achieved magnetic field strength is approximately 700,000 times stronger than Earth's geomagnetic field.
This powerful magnetic field holds particular promise for the field of nuclear fusion, where strong superconducting magnets are essential for confining superheated plasma. ASIPP has been a dedicated force in fusion research, contributing significantly to China's International Thermonuclear Experimental Reactor (ITER) mission by fulfilling numerous procurement packages, including superconductors, correction coils, and magnetic feeders.
Beyond fusion, the implications of this powerful magnetic field extend to various other critical sectors. It offers crucial technical support for aerospace electromagnetic propulsion systems, enabling more efficient space travel. The technology also underpins advancements in magnetic levitation (maglev) systems, promising faster and more efficient transportation. Furthermore, it is vital for the development of superconducting induction heating, efficient power transmission through superconducting cables, and the creation of highly sensitive scientific instruments like nuclear magnetic resonance spectrometers. The development of superconducting cables, for instance, offers a path to near-zero electrical resistance, significantly reducing energy loss and enabling higher current capacities, which is particularly beneficial for urban power grids.