Probing Transverse Coherence of X-ray Beam with 2-D Phase Grating Interferometer

Overview

Journal Opt Express

Specialties Biophysics
Ophthalmology

Date 2014 Jul 1

PMID 24977503

Citations 4

Authors

Shashidhara Marathe

Xianbo Shi

Michael J Wojcik

Naresh G Kujala

Ralu Divan

Derrick C Mancini

Albert T Macrander

Lahsen Assoufid

Affiliations

Soon will be listed here.

Abstract

Transverse coherence of the x-ray beam from a bending magnet source was studied along multiple directions using a 2-D π/2 phase grating by measuring interferogram visibilities at different distances behind the grating. These measurements suggest that the preferred measuring orientation of a 2-D checkerboard grating is along the diagonal directions of the square blocks, where the interferograms have higher visibility and are not sensitive to the deviation of the duty cycle of the grating period. These observations are verified by thorough wavefront propagation simulations. The accuracy of the measured coherence values was also validated by the simulation and analytical results obtained from the source parameters. In addition, capability of the technique in probing spatially resolved local transverse coherence is demonstrated.

Citing Articles

Increased spatial coherence length from an asymmetric crystal reflection at grazing exit.

Macrander A, Shi X, Grizzoli W, Huang X, Pereira N, Wojcik M J Synchrotron Radiat. 2024; 31(Pt 3):508-516.

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Exploring beam size measurement based on the Talbot effect at BEPCII.

Zhang W, Zhu D, Sui Y, Yue J, Cao J, He J J Synchrotron Radiat. 2023; 30(Pt 5):910-916.

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Binary Amplitude Reflection Gratings for X-ray Shearing and Hartmann Wavefront Sensors.

Goldberg K, Wojdyla A, Bryant D Sensors (Basel). 2021; 21(2).

PMID: 33451025 PMC: 7828504. DOI: 10.3390/s21020536.

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating.

Marathe S, Shi X, Wojcik M, Macrander A, Assoufid L J Vis Exp. 2016; (116).

PMID: 27768076 PMC: 5092188. DOI: 10.3791/53025.

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