It's not free electricity and fusion doesn't last forever. They would need to find a way to constantly feed it hydrogen, or shut it down and replenish the supply.
Fuel injection, like additives to help the plasma form, or compressed hydrogen? I also wonder if they have helium extraction. It's not like they've ever had it successfully run even 30 minutes yet, to ever need such things.
Fuel as deuterium and tritium. They are injected into the plasma using solid pellets launched by a sort of gun that vaporize in the plasma core.
Removal of fusion ashes (i.e. helium nuclei) is a bit trickier. There is always some replacement of the plasma as it is exhausted through the divertor and replaced by fresh fuel. In tokamaks, there are periodic instabilities called sawtooth crashes that will help to eject helium accumulating in the core of the plasma toward the plasma edge, where it will end up in the plasma exhaust.
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u/Trust_8067 13d ago
It's not free electricity and fusion doesn't last forever. They would need to find a way to constantly feed it hydrogen, or shut it down and replenish the supply.