I am guessing those are Cockcroft-Walton accelerators and that is the first stage of a larger particle accelerator. The pools on the right might provide some clue. They could be there for cooling or radiation shielding, or both.

Isn’t that the big open room from Forbidden Planet? :)

EDIT: Pretty close actually 😂

I’d say a High Voltage Laboratory at first glance but this looks like a more permanent installation.

Lightning factory

If we had an active VX community I’m sure they could come up with a good answer to this one.

ik I’m late, but this looks like an electrical substation (picrel as a refference) to me, just that it’s indoors and probably built specificly for another installation

EDIT: I just saw the AC sticker on it, which would support my theory