Including the vacuum field energy in stellarator coil design
Including the vacuum field energy in stellarator coil design
Being ``three-dimensional'', stellarators have the advantage that plasma currents are not essential for creating rotational-transform; however, the external current-carrying coils in stellarators are usually not planar. Reducing the inter-coil electromagnetic forces acting on strongly shaped 3D coils while preserving the favorable properties of the ``target'' magnetic field is a design …