China has completed and tested a record 582-tonne superconducting magnet for its Artificial Sun programme, advancing its target of producing fusion electricity around 2030.

China has completed and tested a 582-tonne superconducting magnet designed for its next-generation nuclear fusion programme, marking a major engineering milestone in the country's pursuit of commercial fusion power. The development supports Beijing's ambition to demonstrate electricity generation from controlled nuclear fusion around 2030.

The magnet, developed by the Institute of Plasma Physics under the Chinese Academy of Sciences in Hefei, is intended for the country's planned Burning Plasma Experimental Superconducting Tokamak, part of the broader "Artificial Sun" programme.

Record-Size Magnet Built

The giant toroidal-field magnet weighs 582 tonnes and measures about 21 metres in length. Reports describe it as the largest superconducting fusion magnet built for a controlled fusion reactor.

Such magnets play a critical role in tokamak reactors. They generate powerful magnetic fields that confine extremely hot plasma inside the reactor chamber, preventing the plasma from coming into contact with surrounding structures.

Plasma Hotter Than Sun

Nuclear fusion attempts to reproduce the process that powers the Sun by combining light atomic nuclei under extreme conditions. On Earth, researchers must heat plasma to temperatures exceeding 100 million degrees Celsius and keep it stable long enough for fusion reactions to occur.

The new magnet is designed to support that confinement process. Its superconducting technology allows it to generate strong magnetic fields while operating with comparatively low electrical resistance once maintained under suitable cryogenic conditions.

Hefei Leads Research

The magnet was developed by the Institute of Plasma Physics at the Chinese Academy of Sciences in Hefei. The institute operates the Experimental Advanced Superconducting Tokamak, commonly known as EAST, which has become an important platform for China's fusion research programme.

Researchers have used EAST to investigate plasma confinement and other technologies needed for future fusion reactors. The latest magnet development represents a move towards larger and more powerful machines capable of studying conditions closer to those required for a future fusion power plant.

Roadmap Targets 2030

China's fusion programme has set an ambitious timeline for moving from experimental research towards electricity generation. The Burning Plasma Experimental Superconducting Tokamak is expected to be completed by the end of 2027, with the broader programme targeting its first fusion-based electricity generation around 2030.

The timeline remains technically demanding. Producing fusion reactions in a laboratory is different from operating a system capable of generating electricity reliably and economically.

Global Fusion Race

The development places China among several countries and private companies racing to develop practical fusion energy. Large international projects such as ITER in France are also pursuing magnetic-confinement fusion, while private firms in the United States and elsewhere are developing alternative reactor designs.

China's emphasis on large superconducting magnets reflects the importance of advanced magnet technology in the next generation of tokamak systems. The country has increasingly treated fusion as a strategic energy and technology priority.

Energy Future At Stake

Fusion could eventually provide a low-carbon source of electricity if scientists overcome challenges involving plasma stability, materials, reactor engineering and the economics of continuous operation. However, commercial fusion remains under development, and the 2030 target represents an ambition rather than a guaranteed deadline.

For now, the China Artificial Sun programme's 582-tonne magnet marks a significant step in the country's effort to translate decades of fusion research into a working power-generation system.