Yeah we're talking about enthalpy in a case of very extreme temperatures, over a very small area, in a close time frame. It's an interesting though experiment, and I'll of course be happy if it works, but it seems like business magic more than any real science.McGuire aims to generate the extreme magnetic fields necessary for plasma confinement with superconductors. Currently, the highest temperature we've observed superconductivity capabilities (in specially engineered materials) is around -135C. If he wants to drive turbines with heat generated from the fusion core, he'll require at least a 200C temperature difference across a material that needs to have extreme magnetic permeability. This material is pictured in orange, residing between the confinement vessel's walls, and the superconducting electromagnets.