  We use optical tweezers based on time-multiplexed acousto-optic deflectors to
trap ultra-cold cesium atoms in one-dimensional arrays of atomic ensembles. For
temperatures between 2.5 $\mu$K and 50 nK we study the maximal time between
optical tweezer pulses that retains the number of atoms in a single trap. This
time provides an estimate on the maximal number of sites in an array of
time-multiplexed optical tweezers. We demonstrate evaporative cooling of atoms
in arrays of up to 25 optical tweezer traps and the preparation of atoms in a
box potential. Additionally, we demonstrate three different protocols for the
preparation of atomic-ensemble arrays by transfer from an expanding ultra-cold
atomic cloud. These result in the preparation of arrays of up to 74 atomic
ensembles consisting of $\sim$100 atoms on average.
