Confirmation of the topology of the Wendelstein 7-X stellarator’s magnetic field
Bit of a summary:This is a stellarator which is the same idea as a tokamak: Confine hydrogen with magnets and get fusion.The magnetic field in a stellarator is crazy complicated, and was impossible to model and design before computers. With computers they were able to design it, but were unsure if they could build it.This is a test showing that yes, they can actually build it.In theory stellarators are simpler to get right than tokamaks, but only if you can actually design, and then make one.