A challenge for stellarator researchers is the complexity of the geometry, which makes theoretical models really tricky to build (there's already a lot of compl

A challenge for stellarator researchers is the complexity of the geometry, which makes theoretical models really tricky to build (there's already a lot of complexity in the 'simple' tokamak ones) Howover, a significant pro for stellarators: magnetic geometry is already twisted (necessary condition for confinement), so it is more prone to continuous operation than tokamaks, where you have to twist the field lines (still difficult to do continuously)