Here is a cutaway drawing of a toroidal tokamak for reference. It still has a relatively small center pillar. https://commons.wikimedia.org/wiki/File:JET_cutawa

Here is a cutaway drawing of a toroidal tokamak for reference. It still has a relatively small center pillar. https://commons.wikimedia.org/wiki/File:JET_cutaway_drawing_1980.jpg https://commons.wikimedia.org/wiki/File:JET_cutaway_drawing_...