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Proceedings Paper

Development of synchrotron pink beam x-ray grating interferometer at the Diamond Light source I13-2 beamline
Author(s): Shashidhara Marathe; Malte Storm; Venkata S. C. Kuppilli; Richard Harrison; Gunjan Das; Sven L. M. Schroeder; Silvia Cipiccia; Florian Döring; Christian David; Christoph Rau

Paper 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.

Paper Details

Date Published: 16 October 2019
PDF: 7 pages
Proc. SPIE 11113, Developments in X-Ray Tomography XII, 1111319 (16 October 2019); doi: 10.1117/12.2530698
Show Author Affiliations
Shashidhara Marathe, Diamond Light Source Ltd. (United Kingdom)
Malte Storm, Diamond Light Source Ltd. (United Kingdom)
Venkata S. C. Kuppilli, Univ. of Cambridge (United Kingdom)
Richard Harrison, Univ. of Cambridge (United Kingdom)
Gunjan Das, Diamond Light Source Ltd. (United Kingdom)
Univ. of Leeds (United Kingdom)
STFC Rutherford Appleton Lab. (United Kingdom)
Sven L. M. Schroeder, Diamond Light Source (United Kingdom)
Univ. of Leeds (United Kingdom)
STFC Rutherford Appleton Lab. (United Kingdom)
Silvia Cipiccia, Diamond Light Source Ltd. (United Kingdom)
Florian Döring, Paul Scherrer Institut (Switzerland)
Christian David, Paul Scherrer Institut (Switzerland)
Christoph Rau, Diamond Light Source Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 11113:
Developments in X-Ray Tomography XII
Bert Müller; Ge Wang, Editor(s)

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