Tulse wrote: All the above points are indeed true, but I’m still not clear how far over unity one needs to be for economic viability, nor where other fusion approaches would sit on that curve. (For that matter, I’m not sure what the relative “mine to outlet” energy gain is for coal-fired or nuclear powerplants — does anyone have estimates on that?)
As far as I know FF is closer to unity (or above) than any of the other approaches. The big question is: can it get high enough above unity? Many of the other systems need to be physically scaled up (very expensive) to achieve unity or above. Even then there is no guarantee that they will be economical.
