Superconducting Magnets

China has reached a major milestone in its “artificial sun” program after two core magnet systems for the Experimental Advanced Superconducting Tokamak, or EAST, completed development, acceptance, and full performance testing.The achievement matters because superconducting magnets sit at the center of tokamak fusion technology. Without them, plasma cannot be shaped and controlled with the precision needed for a stable fusion experiment.Two critical systems now completeThe Institute of Plasma Physics under the Hefei Institutes of Physical Science, part of the Chinese Academy of Sciences, said the work covered two major systems: a superconducting toroidal field magnet and a high-temperature superconducting central solenoid coil.Both are considered essential for next-generation fusion reactors. China said the entire process, from design and development to testing, was carried out domestically.SystemMain roleStatusSuperconducting toroidal field magnetForms and maintains the plasma path inside the reactorDeveloped, accepted, and fully testedHigh-temperature superconducting central solenoid coilHelps generate and control the plasma currentDeveloped, accepted, and fully testedWhy the result stands outIn a tokamak, the magnetic system is not a supporting detail but the backbone of the entire experiment. Plasma must remain stable and isolated from the reactor walls, which requires strong and highly precise magnetic control.China said the newly completed systems are among the most advanced in the world in terms of overall performance. The announcement places EAST in a more competitive position within the global race to build practical fusion technology.The full acceptance and performance verification also signal that the components have moved beyond prototype status. That makes the milestone more than a lab success, since it strengthens the technical base needed for future reactor development.A domestically built foundationAnother notable point is the emphasis on domestic development. Fusion technology demands advanced materials, superconducting systems, and precision engineering, so local control over core components can speed up future research and reduce dependence on external technology chains.The Institute of Plasma Physics has played a central role in that effort through its work on tokamak and superconducting magnet systems. As part of CAS, the Hefei-based institute remains one of China’s key research centers for fusion engineering.EAST is widely known as China’s “artificial sun” project, a label that reflects the goal of recreating the energy-generation process that powers the Sun. Fusion is still a complex engineering challenge, but progress in magnet systems is often viewed as one of the clearest signs that a program is advancing in the right direction.With the two core magnets now fully tested, attention shifts to how they will support the next stages of EAST’s development. The latest announcement, made on Saturday (27/6), marks another step in China’s effort to build a more advanced fusion reactor platform.

China’s Fusion Breakthrough, Two Core Magnets for EAST Pass Full Testing