this post was submitted on 30 Nov 2025
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Fusion releases a daughter particle and a neutron. The daughter particle is much larger and will deposit its energy back into the plasma, the neutron will travel much further until it hits a collector outside the chamber, heating it up, which will heat water. You don't get to decide which direction the neutron goes, so you have to build this collector around the entire thing.
There is a hydrogen fusion reaction that releases beta particles, i.e., electrons. This could be used to produce electricity directly without boiling water, but I think the heat output would be such that you could also boil water for more electricity.