  Fusion power plants will require active detachment control to mitigate
sputtering. Although detachment control has been demonstrated on current fusion
experiments, achieving this on fusion power plants will be more challenging due
to their reduced diagnostic set. Real-time scrape-off-layer (SOL) modeling will
help to fill this "diagnostic gap". To determine the minimal set of physics
required for accurate SOL modeling, we use the configurable Hermes-3 edge
modeling framework to perform simple, fixed-fraction-impurity 1D Braginskii
simulations. We show that these simulations reproduce distinctive attached and
detached conditions, as well as the characteristic ion-flux rollover. We also
perform scans of the input heat flux and impurity concentration, and show that
the results predict similar trends to the lower-fidelity Lengyel model. This
allows us to also indirectly compare to SOLPS simulations, and we find that the
Lengyel model has similar "over-estimation" factors to Hermes-1D and SOLPS.
This indirect comparison highlights a series of extensions to bring our
Hermes-1D results closer to the higher-fidelity 2D modeling, with the goal of
developing time-dependent detachment control suitable for next-generation
fusion devices.
