Modeling of Divertor Plates in the Compact Toroidal Hybrid

\newcommand{\g}{\raisebox{-3pt}{$\mathchar'26\mkern-14mu$} $\iota$} In long pulse length stellarator experiments, edge island divertors can be used as a method of plasma particle and heat exhaust. Knowledge of the detailed power loading on these structures and its relationship to the long connection length scrape off layer physics is a new Compact Toroidal Hybrid research thrust. We report the results of connection length studies for divertor plates to be installed in the Compact Toroidal Hybrid (CTH), a five field period torsatron with $R_0=0.75$\,m, $a_p\sim 0.2$\,m, and B~$\leq 0.7\,$T. For these studies, CTH will be operated as a pure stellarator with no ohmically generated plasma current. The CTH edge rotational transform can be varied from \g$_{vac}$(a)=0.02--0.35 by adjusting the ratio of currents in the helical and toroidal field coils. A poloidal field coil is used to adjust the shear of the rotational transform profile, and hence the size of edge islands, while the phase of the island is rotated with a set of five error coils producing an n=1 perturbation. For the studies conducted, a magnetic configuration with a large n=1, m=3 magnetic island at the edge is generated. Results from multiple possible divertor plate locations relative to the island structure will be presented.