Development of synchrotron pink beam x-ray grating interferometer at the Diamond Light source I13-2 beamline

Shashidhara Marathe; Malte Storm; Venkata S. C. Kuppilli; Richard Harrison; Gunjan Das; Sven L. M. Schroeder; Silvia Cipiccia; Florian Döring; Christian David; Christoph Rau

doi:10.1117/12.2530698

16 October 2019 Development of synchrotron pink beam x-ray grating interferometer at the Diamond Light source I13-2 beamline

Shashidhara Marathe, Malte Storm, Venkata S. C. Kuppilli, Richard Harrison, Gunjan Das, Sven L. M. Schroeder, Silvia Cipiccia, Florian Döring, Christian David, Christoph Rau

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Proceedings Volume 11113, Developments in X-Ray Tomography XII; 1111319 (2019) https://doi.org/10.1117/12.2530698
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

X-ray Grating Talbot Interferometer (XGTI) is already routinely used for quantitative phase contrast imaging of soft tissue samples. XGTI can be realized using various measurement techniques, depending on the X-ray source used, the required spatial resolution and the speed of acquisition. The phase-stepping measurement technique, which is commonly used for XGTI data acquisition, needs multiple acquisitions for a single projection. For fast imaging the Moiré technique, a single-shot technique, is often preferred. However, it requires two gratings which increases the dose on the sample. We have therefore examined the Spatial Harmonic Imaging (SHI) technique which is low-dose and single-shot, using the I13-2 Diamond-Manchester Beamline at Diamond Light Source (DLS). The DLS I13-2 beamline is equipped with a Double Crystal Monochromator (DCM) and a Multi-Layer Monochromator (MLM) to deliver monochromatic beam, which work at the energy bandwidths (ΔE/E) of 10^-4 and 10^-2, respectively. However, the disadvantage of using these monochromators, especially for fast imaging, is loss of X-ray flux. It has already been shown that XGTI can work with an energy bandwidth (ΔE/E) of 10^-1. Our aim is to develop a single phase grating interferometer with pink beam from an undulator source, with X-ray mirror optics and multiple absorption filters, to obtain maximum possible flux with sufficient coherence and monochromaticity. We demonstrate performance with optimized beamline parameters for a photon energy of 15 keV with some demonstrative image reconstructions.

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Shashidhara Marathe, Malte Storm, Venkata S. C. Kuppilli, Richard Harrison, Gunjan Das, Sven L. M. Schroeder, Silvia Cipiccia, Florian Döring, Christian David, and Christoph Rau "Development of synchrotron pink beam x-ray grating interferometer at the Diamond Light source I13-2 beamline", Proc. SPIE 11113, Developments in X-Ray Tomography XII, 1111319 (16 October 2019); https://doi.org/10.1117/12.2530698

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