China's largest superconducting component for the national major-science facility Comprehensive Research Facility for Key Systems of the Fusion Reactor Host—the toroidal field magnet—has completed final fabrication and passed expert acceptance. A high-temperature superconducting central coil also completed full-operating-parameter testing with core performance at internationally leading levels. The toroidal magnet, the world's largest superconducting magnet for a fusion reactor, measures 21m by

China's largest superconducting component for the national major-science facility Comprehensive Research Facility for Key Systems of the Fusion Reactor Host—the toroidal field magnet—has completed final fabrication and passed expert acceptance. A high-temperature superconducting central coil also completed full-operating-parameter testing with core performance at internationally leading levels. The toroidal magnet, the world's largest superconducting magnet for a fusion reactor, measures 21m by 12m by 3.3m and weighs 582 tonnes. Authorities say the full magnet chain is now domestically developed and controllable, with performance metrics ahead of international peers.