I have never dug into fusion physics, but from what I gather one of the main problems is confining the fusion in a small region of space for long enough to get enough helium fused to counterbalance the expended energy.
It strikes me that proposed reactor designs (tokamak, stellarator...) have no moving parts - perhaps better confinement can be achieved by, say, moving the coils around at high speeds. Is that possible? Apart from engineering constraints (rotating nuclear reactors, heck), is that any different from what is being done now?
I presume this can be done by alternating currents instead of physically moving the wires, but I am pretty sure alternating currents at fixed location cannot model arbitrary magnetic/electric field profiles.