The device, part of the CRAFT artificial sun reactor, sets new international benchmark in push for clean energy
2-MIN READ2-MINZhang Tongin BeijingPublished: 6:00pm, 28 Jun 2026The world’s biggest superconducting magnet for a nuclear fusion reactor has passed final tests as part of China’s CRAFT “artificial sun” project, eclipsing international performance benchmarks.The assembly comprises two coils: a toroidal-field magnet that acts as a magnetic cage, and a central solenoid that serves as the igniter.
The project – the Comprehensive Research Facility for Fusion Technology – aims to create a miniature sun at over 100 million degrees Celsius (over 180 million Fahrenheit) and trap it inside a doughnut-shaped metal cage to generate electricity.
The magnetic cage, known as the CRAFT toroidal field coil, is a core component of the reactor.
It uses a strong magnetic field to prevent the container of the miniature sun from melting as the plasma inside reaches hundreds of millions of degrees.
