The reporter learned on the 5th that the "Eastern Sun" (EAST) project, often referred to as the "Artificial Sun" by the media, has made significant progress. The Dongfang Superloop neutral beam injection system successfully achieved a 100-second long-pulse neutral beam, marking an important milestone in China's fusion research.
This breakthrough is the first of its kind in China and represents a major step forward in the development of neutral beam injection technology. The system, part of the EAST auxiliary heating project, was tested on a comprehensive platform and demonstrated its capability to operate for extended periods.
The Neutral Beam Injection (NBI) system is one of two key auxiliary heating systems for the EAST device, which is a large-scale scientific project funded by the National Development and Reform Commission. Developed entirely within China, the NBI system involves advanced technologies such as high-current ion sources, vacuum engineering, low-temperature systems, high-voltage isolation, remote control, and plasma diagnostics.
During this experiment, the team completed the setup in just 10 days, successfully generating a long-pulse hydrogen neutral beam with a beam energy of 30 keV, a current of 9A, and a power of approximately 0.3 MW. The test not only validated the performance of the high-power ion source but also confirmed the system’s ability to operate continuously for 100 seconds.
These results indicate that China's self-developed neutral beam injection system has reached an international level, overcoming major technical challenges. This achievement lays a solid foundation for future experiments at EAST in 2013.
The EAST device is the world's first fully superconducting tokamak designed and built by China, symbolizing the country's growing role in the global pursuit of clean and sustainable nuclear fusion energy.
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