China achieves major breakthrough in superconducting magnet development for nuclear fusion reactor

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Jinse Finance reported that on June 27, the largest superconducting component of the major national scientific and technological infrastructure project “Comprehensive Research Facility for Fusion Reactor Host Key Systems”—the toroidal field magnet—completed its final manufacturing process and passed expert acceptance. At the same time, the high-temperature superconducting center solenoid coil magnet also completed full-load parameter testing, with core performance reaching internationally leading levels. The toroidal field magnet is currently the superconducting magnet with the largest volume for a fusion reactor in the world. Measuring 21 meters in length, 12 meters in width, and 3.3 meters in height, it has a total weight of 582 tons, making it the largest-sized superconducting magnet for a fusion reactor in the world today. The toroidal field magnet is one of the most important components of the large scientific facility “Comprehensive Research Facility for Fusion Reactor Host Key Systems.” During operation of the nuclear fusion device, superconducting magnets generate a strong magnetic field to confine plasma at temperatures of hundreds of millions of degrees Celsius. Among them, the toroidal field magnet is responsible for building the toroidal magnetic field to confine the plasma, reducing the impact-induced loss caused by high-energy particles striking the vacuum chamber wall. At present, the entire magnet system has achieved fully domestically produced and independently controllable coverage across all key links, and all performance indicators lead internationally among similar products.
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