Quantifying grating defects in X-ray Talbot-Lau interferometry through a comparative study of two fabrication techniques.

ABSTRACT: The performance of an X-ray grating interferometry system depends on the geometry and quality of the gratings. Fabrication of micrometer-pitch high-aspect-ratio gold gratings, which are essential for measuring small refraction angles at higher energies, is challenging. The two widely used technologies for manufacturing gratings are based on gold electroplating in polymeric or silicon templates. Here, gratings manufactured by both approaches were inspected using conventional microscopy, X-ray synchrotron radiography, and computed laminography to extract characteristic features of the gratings profile to be modeled accurately. These models were used in a wave-propagation simulation to predict the effects of the gratings' geometry and defects on the quality of a Talbot-Lau interferometer in t

SUBMITTER: Pereira A 

PROVIDER: S-EPMC12022164 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature