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Nuclear fusion reactor in South Korea runs at 100 million degrees C for a record-breaking 48 seconds
(www.livescience.com)
this post was submitted on 06 Apr 2024
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I think the current designs would all use radiation heat, which means infrared etc light hitting the reactor walls and a coolant (water) running through them to generate steam, and then it's the good old turbine to electricity process... Light emitted from a plasma that hot isn't that hot itself / wouldn't heat reactor walls to the same temps.