[mpweiher]

Yeah. There's even a clue in what it's called: a vacuum chamber.

Densities are extremely low, so you only have a few grams of material in the reactor, even at large volumes anticipated for a commercial design.

Furthermore, the reaction is extremely finicky, as demonstrated by what an incredibly hard time we are having creating and more importantly sustaining it. Any deviation from the ideal and it just goes out. So no runaway chain reactions.

https://en.wikipedia.org/wiki/Fusion_power#Accident_potentia...