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Updated: Oct 26, 2025

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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Laboratory X-ray interferometry imaging with a fan-shaped source grating.

Zhitian Shi, Konstantins Jefimovs, Lucia Romano

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    Summary
    This summary is machine-generated.

    Researchers developed novel fan-shaped gratings to improve laboratory X-ray interferometry. This advancement enhances the field of view and angular sensitivity in X-ray imaging systems.

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    Area of Science:

    • Physics
    • Materials Science
    • Optical Engineering

    Background:

    • Laboratory grating-based X-ray interferometry faces challenges with cone beam orientation mismatch.
    • This mismatch limits the imaging field of view, hindering practical applications.
    • Flat substrate gratings are particularly susceptible to this orientation issue.

    Purpose of the Study:

    • To address the orientation mismatch challenge in grating-based X-ray interferometry.
    • To improve the imaging field of view and performance of laboratory X-ray interferometers.
    • To develop a novel grating design for enhanced X-ray imaging.

    Main Methods:

    • Fabrication of fan-shaped G0 source gratings using modulated electric fields during deep reactive ion etching of silicon.
    • Electroplating gold onto the fan-shaped gratings to create a 3.0 µm pitch structure.
    • Integration of the fan-shaped grating into a 20 keV X-ray interferometer.

    Main Results:

    • The fan-shaped G0 grating improved the uniformity of the field of view.
    • Average visibility increased from 16.2% to 18.5%.
    • Angular sensitivity at the edges improved by a factor of 5.8.

    Conclusions:

    • Fan-shaped G0 gratings effectively mitigate orientation mismatch issues in laboratory X-ray interferometry.
    • The novel grating design significantly enhances field of view uniformity and edge sensitivity.
    • This fabrication method offers a promising solution for improving X-ray imaging performance.