Versatile tabletop setup for picosecond time-resolved resonant soft-x-ray scattering and spectroscopy

Area of Science:

• Physics
• Materials Science
• Spectroscopy

Background:

• Advanced soft-x-ray techniques are crucial for materials characterization.
• Access to high-brightness, tunable soft-x-ray sources is often limited to large-scale facilities.

Purpose of the Study:

• To develop a compact, high-performance laboratory-scale soft-x-ray source.
• To enable time-resolved magnetic resonant scattering and near-edge x-ray absorption fine-structure (NEXAFS) spectroscopy at the lab scale.

Main Methods:

• A laser-driven plasma generates broadband soft x rays (50–1500 eV) with <10 ps pulse duration.
• Two beamlines utilize reflection zone plates (RZPs) for efficient x-ray capture, dispersion, and focusing.
• Hybrid RZPs achieve resolving powers >1000 and >500 across the spectral range.

Main Results:

• Demonstrated versatility with various soft-x-ray spectroscopy and scattering experiments.
• Achieved high resolving power (E/ΔE > 1000) and consistent performance (E/ΔE > 500) for time-efficient data acquisition.
• Obtained excellent data quality comparable to large synchrotron facilities.

Conclusions:

• The developed laser-driven soft-x-ray source provides a powerful laboratory alternative to synchrotrons and free-electron lasers.
• This compact system significantly expands the accessibility of advanced soft-x-ray techniques.
• The experimental flexibility and data quality open new research avenues in materials science and physics.