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The usual place. Surround your fusion reactor in a very thick blanket of opaque hydrogen plasma so the neutrons can bump into something.

Contain the whole thing in some kind of force field (if only there was some alternative to the EM force for this purpose), then when the photons hit your photon electric generators you get electricity.

If you arrange things such that the outside of the opaque hydrogen blanket is about 5800 Kelvin and your photon-electric generator panels are spread out in parallel to...let's say about a kilowatt of energy per square metre they should last a couple of decades and your efficiency will be okay, maybe around 20-30%

There. Fusion power plant invented. Sadly it's just a pipe dream though because we couldn't roll it out without first waiting for a stable fusing plasma source on earth.



> Surround your fusion reactor in a very thick blanket of opaque hydrogen plasma so the neutrons can bump into something.

If you compute how thick that plasma would have to be to stop neutrons you'll realize this idea is totally unworkable.


How does neutrons bumping protons produce light?


It heats them up (The joke is I'm describing the sun and solar panels as the end state of trying to overcome the technical hurdles of building a heat engine to extract electricity from fusion if you're not just playing along).

Jokes aside, TEGs are pretty neat. In addition to harvesting what is currently waste heat in someplaces or having applications in geothermal or solar collectors they might even make fission not-stupid. Can't forsee any way fusion works as practical power generation this century though. It has worse power density than chemical and much higher temperatures to deal with and much higher neutron flux than fission as well as needing massive 2 kelvin magnets right next to the 100 million degree plasma that explode if they warm up to 3 kelvin.


Solar fusion doesn't produce neutrons hot or otherwise. It produces gamma rays, helium nuclei, and neutrinos.




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