this post was submitted on 27 May 2025
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The tricky bit isn't to get atoms to fuse. That's a fairly simple lab bench experiment. The problem is creating the right conditions where the fusion reaction is self-sustaining, with a net energy output. That means reaching temperatures of between 100 – 150 million °C (180 – 270 million °F, or 3-5 times hotter than the Sun's core), a pressure of five to 10 atmospheres at the point of reaction, and keeping a high-energy plasma stable for at least 10 seconds.
Keep a stable reaction while pulling energy from it (and pull enough energy so it doesn't overheat and collapse the superconducting magnetic coils but not so much energy that the fusion stalls)