A high harmonic generation (HHG) beamline capable of generating extreme ultraviolet (XUV) radiation in the 15–90 eV photon energy range has been designed to establish a platform for attosecond science and ultrafast spectroscopy. The primary scientific objective is to investigate electron dynamics following photoionization with attosecond temporal resolution, enabling the study of fundamental light–matter interactions on their natural timescales. 

The beamline is designed around a CEP-stabilized Yb:KGW laser system operating at 1030 nm, providing pulse durations of 180 fs, 60 fs, and post-compressed 6 fs pulses, with a maximum average power of 20 W. The optical and vacuum layout has been developed to support efficient HHG while providing the flexibility required for different experimental configurations. The beamline consists of dedicated focusing, HHG, pumping, filtering, plasma, and diagnostics sections. The interaction chamber is designed to accommodate gas jets, gas cells, and laser-produced plasma (LPP) targets, allowing different nonlinear media and focusing conditions to be employed according to experimental requirements. This architecture enables direct comparison and optimization of multiple HHG schemes within a common experimental platform.

Several engineering challenges were addressed during the design process. These include laser beam transport and coupling between chambers with different optical heights, preservation of polarization during beam steering and vacuum integration, accommodation of multiple chambers within the available laboratory space, and mitigation of thermal loading on thin XUV filters caused by the residual 20 W driving laser. In parallel, studies of laser-produced plasmas from structured targets were carried out to assess their potential for enhancing HHG and extending future experimental capabilities. The completed beamline design provides the foundation for system integration, commissioning, and XUV generation experiments, with the long-term goal of implementing attosecond pump-probe measurements to investigate ultrafast electron dynamics in atoms, molecules, and condensed matter systems