  State-of-the-art individual-atom tweezer platforms have relied on loading
schemes based on spatially superimposing the tweezer array with a cloud of cold
atoms created beforehand. Together with immanent atom loss, this dramatically
limits the data rate, as the application sequence must be alternated with the
time-consuming phases of magneto-optical trapping and laser cooling. We
introduce a modular scheme built on an additional cold-atom reservoir and an
array of buffer traps effectively decoupling cold-atom accumulation and
single-atom supply from the quantum-register operation. For this purpose, we
connect a microlens-based tweezer array to a cloud of laser-cooled atoms held
in an auxiliary large-focus dipole trap by utilizing atom transport and buffer
traps for dedicated single-atom supply. We demonstrate deterministic loading of
a hexagonal target structure with atoms solely originating from the reservoir
trap. The results facilitate increased data rates and unlock a path to
continuous operation of individual-atom tweezer arrays in quantum science,
making use of discrete functional modules, operated in parallel and spatially
separated.
