>D-D requires a higher triple product than D-T fusion and produces less energy, so most companies go with D-T, and don't attempt to use D-D to produce the triti

>D-D requires a higher triple product than D-T fusion and produces less energy, so most companies go with D-T, and don't attempt to use D-D to produce the tritium. Yes, because again, all the ways we know how to make Tritium are implausible from either an energy balance standpoint or a "where do we get all these energized neutrons" standpoint. That's always been my argument. >You don't need to breed He3 unless you can get net power from D-He3. If you can do that, then you can probably also get net power from D-D Going back to this, you're aware D-D results in 50% T and 50% He3, right? Helion relies on D-T fusion working so they can sell their "waste" Tritium (lol). None of these things you are claiming to be easy factually pencil out and that is why we are so far from commercial fusion.