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The sun pours out an amazing amount of energy. Only a small fraction of the sun's total output reaches us, yet it powers our entire ecosystem. All the plants and animals on planet earth rely on this warmth for light and food. Surprisingly, though, the sun is not a terribly good fusion reactor, for its size. In terms of power output per volume, JET at its best is over 700 times better, and ITER will be a staggering 2,150 times more efficient fusion reactor than the sun.
ITER's plasma volume will be 840 cubic metres, which with the target of 500 megawatt output power equates to nearly 600 kilowatts per cubic metre—the most efficient fusion reactor not only on Earth, but in the whole solar system!
At the Korea Institute of Fusion Energy (KFE), the KSTAR tokamak recommenced operations in December after a major upgrade to replace the…
KSTAR aims for longer plasmas
At the Korea Institute of Fusion Energy (KFE), the KSTAR tokamak recommenced operations in December after a major upgrade to replace the device's carbon divertor with a tungsten divertor.
According to an article on the KFE website, the original carbon divertors could take a thermal load of 5MW/m², whereas the tungsten divertor can take 10MW/m². The upgrade is critical to the goal of sustaining a 100-million-degree plasma for 300 seconds by 2026. Data from the operational campaign will be directly relevant to ITER, which will operate a tungsten divertor under similar plasma conditions in terms of shape and structure.
This testing campaign will continue through February 2024. Read more about the plans in this article in English on the KFE website, or in Korean in the Chosun Biz.