  In-situ, two-dimensional (2D) Langmuir probe measurements across a large part
of the TCV divertor are reported in L-mode discharges with and without divertor
baffles. This provides detailed insights into time averaged profiles, particle
fluxes, and fluctuations behavior in different divertor regimes. The presence
of the baffles is shown to substantially increase the divertor neutral pressure
for a given upstream density and to facilitate the access to detachment, an
effect that increases with plasma current. The detailed, 2D probe measurements
allow for a divertor particle balance, including ion flux contributions from
parallel flows and ExB drifts. The poloidal flux contribution from the latter
is often comparable or even larger than the former, such that the divertor
parallel flow direction reverses in some conditions, pointing away from the
target. In most conditions, the integrated particle flux at the outer target
can be predominantly ascribed to ionization along the outer divertor leg,
consistent with a closed-box approximation of the divertor. The exception is a
strongly detached divertor, achieved here only with baffles, where the total
poloidal ion flux even decreases towards the outer target, indicative of
significant plasma recombination. The most striking observation from relative
density fluctuation measurements along the outer divertor leg is the transition
from poloidally uniform fluctuation levels in attached conditions to
fluctuations strongly peaking near the X-point when approaching detachment.
