Ultrastable, high-repetition-rate attosecond beamline for time-resolved XUV-IR coincidence spectroscopy

TL;DR

This paper presents an ultrastable, high-repetition-rate attosecond beamline enabling precise time-resolved XUV-IR coincidence spectroscopy, crucial for studying atomic and molecular dynamics with high stability and low error in delay measurements.

Contribution

The paper introduces a novel implementation of industrial-grade lasers and a carefully designed delay line to achieve ultrastability and minimal delay error in attosecond spectroscopy experiments.

Findings

Achieved only 12 as error in time delay estimation.

Enabled stable data acquisition over several hours to days.

Facilitated investigation of attosecond dynamics in quantum systems.

Abstract

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.