The hard X-ray ptychography endstation at the Taiwan Photon Source

Area of Science:

• Materials Science
• Physics
• Biotechnology

Background:

• Ptychography is an advanced imaging technique utilizing overlapping diffraction patterns.
• The Taiwan Photon Source (TPS) previously demonstrated ptychography capabilities.
• Further system upgrades were necessary to enhance resolution and performance.

Purpose of the Study:

• To detail the design and performance of the upgraded hard X-ray 2D ptychography endstation, TPS 25A2.
• To establish a new benchmark for nanoscale imaging resolution at TPS.
• To showcase the endstation's capabilities for diverse scientific applications.

Main Methods:

• Integration of a zone-plate focusing system into the existing Kirkpatrick-Baez mirror optics.
• Operation at a photon energy of 8.979 keV.
• Characterization using a Siemens star test pattern for resolution assessment.

Main Results:

• Routine achievement of sub-10 nm spatial resolution in 2D imaging.
• Highest recorded resolution of 6.9 nm on a Siemens star test pattern.
• Successful imaging of inorganic nanoparticles and a complex biological structure.

Conclusions:

• The upgraded TPS 25A2 endstation provides a powerful and accessible tool for nanoscale imaging.
• The system demonstrates state-of-the-art resolution for hard X-ray ptychography.
• This advancement significantly benefits the scientific community for advanced materials and biological research.