Has anyone investigated a hybrid polywell/tokamak machine?
Picture a tokamak with a toroidal poly-grid inside such that the reaction volume is toroidal but the magnetic fields press inwards more strongly as the reaction volume gets denser and presses outward more strongly. (IIRC., that means the poly-grid would provide a convex field?) The inner poly-grid would be comprised of simple rectangular coils (as close ot square as needful) arranged in a toroid, with larger units (with more windings) on the outer major radius, smaller rectangles, fewer windings on the inner, properly graded around the minor diameter. Imagine a medium resolution finite element model of a toroid.
At certain points around the circumference of the grid, quads of coils would be intensionally misaligned to allow injection ports thru the funny cusps.
Thoughts?