Versatile attosecond beamline in a two-foci configuration for simultaneous time-resolved measurements

Area of Science:

• Ultrafast Laser Physics
• Attosecond Spectroscopy
• Quantum Dynamics

Background:

• Attosecond spectroscopy requires precise generation and characterization of ultrashort light pulses.
• Existing setups often lack versatility for studying diverse phenomena.
• The need for advanced tools to probe electron dynamics in matter is critical.

Purpose of the Study:

• To present a novel, versatile attosecond beamline for broad applications in ultrafast science.
• To enable simultaneous measurements in multiple interaction regions.
• To demonstrate the capability for advanced spectroscopic techniques.

Main Methods:

• High-harmonic generation (HHG) in noble gases using an infrared (IR) driving field to produce extreme ultraviolet (XUV) pulses.
• Non-collinear setup for independent beam access and XUV-IR cross-correlation measurements.
• Polarization gating for single attosecond pulse generation and attosecond streaking for temporal characterization.
• Simultaneous operation of two target chambers with a toroidal mirror relay and flexible end-station integration.

Main Results:

• Successful generation and characterization of single attosecond pulses.
• Demonstration of simultaneous measurements, including photoelectron/photoion spectroscopy, transient absorption, and surface analysis.
• Successful operation of a surface analysis chamber with a hemispherical electron analyzer.
• Recording of simultaneous RABBITT (RAdiometric Bandwidth-Broadening by Interference of Two-photon Transitions) measurements in two argon jets.

Conclusions:

• The presented attosecond beamline is a highly versatile platform for attosecond spectroscopy.
• Its design allows for simultaneous, multi-modal experiments, significantly enhancing research capabilities.
• The successful demonstration confirms its readiness for diverse ultrafast science investigations.