  A baffled Snowflake Minus Low-Field Side (SF-LFS) is geometrically-optimised
in TCV, increasing divertor neutral pressure, to evaluate the roles of divertor
closure (comparing with an unbaffled SF-LFS) and magnetic geometry (comparing
with a baffled Single Null, SN) in power exhaust and core-divertor
compatibility. Ohmically-heated L-mode discharges in deuterium, with a
line-averaged core density of approximately 4x10(19) m-3, are seeded with
nitrogen to approach detached conditions. Baffles in the SF-LFS configuration
are found to reduce the peak outer target heat flux by up to 23%, without
significantly affecting the location of the inter-null radiation region or the
core-divertor compatibility. When compared to the baffled SN, the baffled
SF-LFS exhibits a reduction in outer target heat flux by up to 66% and the
ability to balance the strike-point distribution of heat flux. These benefits
are less significant with N2 seeding, with similar peak target quantities (such
as heat flux, electron temperature and ion flux) and divertor radiated power.
Despite a radiating region located farther from the confined plasma for the
SF-LFS than the baffled SN, no change in core confinement is observed. Core
effective charge even indicates an increase in core impurity penetration for
the SF-LFS. These experiments constitute a good reference for detailed model
validations and extrapolations, exploring important physics such as core
impurity shielding and the dependence of divertor cross-field transport on
magnetic geometry.
