Timeline for How large can you make a tokamak?

Current License: CC BY-SA 3.0

7 events
when toggle format what by license comment
Oct 21 '18 at 5:26 comment added CBowman @peterh I guess you're referring to the possibility of using aneutronic fusion and then extracting all the energy via cooling the wall? You're right, there is radiation, but in the context of tokamaks, there isn't any point even considering aneutronic fusion concepts given how infeasible they are compared with DT fusion. The point at the end of the day is net energy gain, and for the foreseeable future DT is our only option.
Oct 20 '18 at 21:11 comment added peterh @CBowman Simple thermal radiation carries away energy, too. It can be used to heat the container wall, which can be cooled by water. This water can drive the turbines.
Dec 6 '12 at 19:17 comment added Joel I was thinking mainly of D/He-3, although I know that it's not really aneutronic. I guess for truly aneutronic reactons, like p/B-11 or He-3/He-3, you are not going to use the tokamak design anyway. But your point that the maximum size of a tokamak is coupled to the acceptable neutron radiation intensity (as well as the choice of material) is very valid, of course.
Dec 6 '12 at 15:02 comment added CBowman @Joel: When you say aneutronic fusion what reactions do you have in mind? The only reaction which will produce any meaningful power in a tokamak is the DT fusion reaction which does release a neutron. Probably the more important point is that we need the neutron to carry some of the energy released away from the plasma so that we can capture it as heat, which we then use to drive turbines.
Dec 6 '12 at 13:09 comment added Joel Thanks for this interesting answer. But this neutron flow argument does not hold anymore when considering aneutronic fusion, right?
Dec 6 '12 at 1:00 review First posts
Dec 6 '12 at 1:24
Dec 6 '12 at 0:41 history answered CBowman CC BY-SA 3.0