  An efficient numerical method of studying nonresonant stellarator divertors
was introduced in Boozer and Punjabi [Phys. Plasmas 25, 092505 (2018)]. This
method is used in this paper to study a different magnetic field model of a
nonresonant divertor. The most novel and interesting finding of this study is
that diffusive magnetic field lines can be distinguished from lines that exit
through the primary and the secondary turnstile, and that below some diffusive
velocity, all lines exit through only the primary turnstile. The footprints of
each family are stellarator symmetric and have a fixed location on the wall for
all velocities. The probability exponent of the primary turnstile is d1 = 9/4
and that of the secondary turnstile is d2 = 3/2. This study also addresses the
issues of an inadequate separation of the chamber walls from the outermost
confining magnetic surface and a marginal step size of the numerical
integrations that could compromise the interpretation of the earlier results
[Boozer and Punjabi, Phys. Plasmas 25, 092505 (2018)]. The previous value of d1
= 2 is within the error bar of d1 = 9/4 estimated here.
