  The implementation of attosecond photoelectron-photoion coincidence
spectroscopy for the investigation of atomic and molecular dynamics calls for a
high-repetition-rate driving source combined with experimental setups
characterized by excellent stability for data acquisition over time intervals
ranging from a few hours up to a few days. This requirement is crucial for the
investigation of processes characterized by low cross sections and for the
characterization of fully differential photoelectron(s) and photoion(s) angular
and energy distributions. We demonstrate that the implementation of
industrial-grade lasers, combined with a careful design of the delay line
implemented in the pump-probe setup, allows one to reach ultrastable
experimental conditions leading to an error in the estimation of the time
delays of only 12 as. This result opens new possibilities for the investigation
of attosecond dynamics in simple quantum systems.
