I think there’s something important in the tuned circuit view of things. It could be an LC resonator, or something like two “fusion chambers” bouncing energy back and forth, or it might even be something like a giant cavity magnetron. I would (personally) like the elegance of the formation of plasmoids being self repeating, but it may be difficult to get the system’s natural resonance down to a few hundred Hertz.
In any case, getting unity out of a single shot is a far more important step.
