  Non-resonant stellarator divertors have magnetic flux tubes, called magnetic
turnstiles, that cross cantori, which are fractal remnants of destroyed
invariant tori with holes, that lie outside the outermost confining surface.
The exiting and entering flux tubes can be adjacent as is generally expected
but can also have the unexpected feature of entering or exiting at separate
locations of the cantori. Not only can there be two types of turnstiles, but
pseudo turnstiles can also exist. A pseudo turnstile is formed when a cantorus
has a sufficiently large, although limited, radial excursion to strike a
surrounding chamber wall. The existence of non-adjacent and adjacent turnstiles
and pseudo turnstiles resolves issues that arose in earlier simulations of
nonresonant stellarator divertors [A. Punjabi and A. H. Boozer, Phys. Plasmas
27, 012503 (2020)].
