High-acceptance versatile microfocus module based on elliptical Fresnel zone plates for small-angle X-ray scattering

Area of Science:

• X-ray optics and instrumentation
• Materials science and condensed matter physics

Background:

• High-efficiency microfocusing of multi-keV X-rays is crucial for spatially resolved structural analysis.
• Synchrotron radiation is often horizontally elongated, necessitating specialized optics for isotropic microbeams.

Purpose of the Study:

• To develop and demonstrate an optics system for generating isotropic microbeams from synchrotron sources.
• To enable high-resolution structural analysis using microfocused X-rays.

Main Methods:

• Utilized a combination of a horizontally tunable slit and elliptical diffractive Fresnel zone plates.
• Integrated the optics system with small-angle X-ray scattering (SAXS) experiments.

Main Results:

• Achieved a microbeam size of 2.2 μm × 1.8 μm (X × Y).
• Delivered a high flux of 1.2 × 10^10 photons/s at 11.2 keV at the sample position.

Conclusions:

• The developed optics system effectively produces isotropic microbeams for synchrotron-based structural analysis.
• This advancement enhances the capabilities of techniques like SAXS for detailed material characterization.