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Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775

July 2018 issue

Early view articles

Journal cover

facility information


q2xafs2017 workshop


J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518003752
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A program and methodology are proposed to study X-ray absorption fine structure of potential reference samples across XAS beamlines and synchrotron facilities, to enable each beamline to cross-calibrate, provide representative benchmarks and to enable more productive collaborative cross-facility activities.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518002072
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A simple scheme for the coherent incorporation of extended X-ray absorption fine-structure (EXAFS) spectroscopy data into the atomistic structure refinement of diffraction data obtained from melt-quenched glasses is demonstrated. The method is shown to significantly improve the quality and consistency of the finally generated structural models.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518006021
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A summary of the discussion on aspects of a XAFS experiment that affect data quality, held at the Q2XAFS Workshop Satellite to IUCr Congress 2017 on `Data Acquisition, Treatment, Storage – quality assurance in XAFS spectroscopy' is reported.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518005325
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A highly sensitive setup for measuring fluorescence-detected X-ray absorption spectroscopy with sub-second time resolution has been developed at the SuperXAS beamline at the Swiss Light Source. This opens new opportunities for understanding the dynamic structure of heterogeneous catalysts.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518006549
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An approach to investigate XAS data without standard interpolation of experimental data and with minimal loss of information content has been developed. The additional physical insight accorded by the correct propagation of experimental uncertainty has been used to determine newly refined structures for the innermost co-ordination shell of Ni(II) coordination complexes.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518006963
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The present situation of the XAFS database in Japan and a proposal for the construction of an international collaboration XAFS database are presented.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518006173
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The current status and technical details of the four instruments dedicated to X-ray spectroscopy available at Diamond Light Source are presented.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518007518
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State-of-the-art beamline automation for XAS beamlines implemented at the synchrotron at Karlsruhe Institute of Technology is described.

research papers


J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518005799
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X-ray absorption spectroscopy was applied to study the enhanced insulating behavior in the Ir-vacant Sr2Ir1–xO4 system. Data pointed out that both the more distorted IrO6 octahedra and decreased Ir—O1—Ir angle contribute to the increment of the band gap, and then result in the enhanced insulating state for Sr2Ir1–xO4.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518005568
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Three-dimensional structure reconstructions of ribosome from simulated XFEL diffraction patterns using a slice-matching approach provide insights on how XFEL single-particle experimental conditions and the amount of data affect the resulting resolution.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518005829
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By using soft X-ray transmission microscopy with magnetic contrast (magnetic circular dichroism) it is possible to obtain valuable magnetic information from the studied systems. In this work, in a step further, a method to use magnetic soft X-ray transmission tomography as an ideal tool to reconstruct the three-dimensional magnetization configuration of arbitrary magnetic samples is presented.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518005489
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Protocols for combined synchrotron micro-computed tomography based virtual histology and classical histology of soft-tissue samples are presented.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S160057751800588X

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518005945
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Quartz- and sapphire-based high-resolution double-bounce monochromators for RIXS spectroscopy at the Ir L3 absorption edge are tested. At room-temperature operation it is found that quartz is substantially distorted by even small amounts of incident power, making it unsuitable for this application, whereas sapphire and silicon are reasonably unaffected.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518006318
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Diamond X-ray detectors with N-UNCD contacts have been demonstrated for X-ray flux measurement and position calibration. The contacts have significant advantages over traditional metal contacts due to a lack of extra absorption edges, less absorption in the soft X-ray range, and similar material properties to the underlying detector material.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518006197
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Large-area single-photon-counting CdTe detectors are attractive due to their high-efficiency, low-noise and spectral performances but they still present several non-optimal behaviours (e.g. charge trapping, inter-module gaps etc.). These issues are addressed in this article where a comprehensive step-by-step description of a pre-processing procedure is presented and tested in the framework of a synchrotron radiation low-dose tomographic application on breast specimens.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518005970
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An induction furnace for in situ high-resolution synchrotron and laboratory hard X-ray microradiography and computed microtomography developed at the Elettra synchrotron radiation facility is described.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518005623
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Engineered porous materials are proposed as random absorption masks for X-ray phase-contrast imaging in high-energy regions (i.e. over 50 keV).

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518006203
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The use of the X-ray fluorescence setup on the B16 beamline at the Diamond Light Source for X-ray imaging with sub-micrometer resolution was described and it was shown that this setup is very well suited for studying thin samples, especially for biological applications.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518006501
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Methods are described to measure divergence by imaging the apparent source size using either slits to form a pinhole camera or a compound refractive lens. The values of brightness and coherent flux obtained are compared with those calculated for the undulator source, to evaluate the effects of beamline optics.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518006574
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An optical stretcher was used to trap and manipulate biological cells and latex beads in a microfluidic channel. The trapping capability was used to image isolated suspended cells using X-ray phase-contrast imaging. By rotation of the specimen, even the three-dimensional phase shift of a cell could be recovered.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518006902
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Pre-edge peaks in 3d transition-metal element (Sc, Ti, V, Cr and Mn) K-edge XANES (X-ray absorption near-edge structure) spectra in AO2 (A = Ti and V), A2O3 (A = Sc, Cr and Mn) and AO (A = Mn) were measured at various temperatures. The difference peak is obtained from the difference between the low- and high-temperature XANES spectra.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S160057751800601X
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MapReduce-based implementation of computing auto-correlations for X-ray photon correlation spectroscopy data at beamline 8-ID at the Advanced Photon Source are presented.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518007208
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The properties of stacking multiple Fresnel zone plates together at intermediate distances are considered. One can enhance the nanofocusing efficiency, and other characteristics, by careful choice of design parameters.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518007439
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A three-image algorithm is proposed for simultaneous retrieval of absorption, refraction and ultra-small-angle scattering information in X-ray analyzer-based imaging. The novel algorithm is theoretically derived, and validated by synchrotron radiation experiments. Furthermore, the effect of angular mis-alignment on the accuracy of the retrieved images is theoretically investigated.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518007221
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A detailed description of an imaging protocol which integrates both near- and far-field ptychography with full-field and scanning transmission X-ray microscopy in multiscale imaging experiments at synchrotron endstations is given.

J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518007695
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Ultrahigh-precision Bragg reflectivity studies of diamond single crystals exposed to X-ray beams of power densities corresponding to the X-ray Free Electron Laser Oscillator are presented.

beamlines


J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518005775
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The photon diagnostics available at the SwissFEL Aramis beamline are described. The working principles of various devices, their function and their expected or measured performance are discussed.

computer programs


teaching and education


J. Synchrotron Rad. (2018). 25
https://doi.org/10.1107/S1600577518005441
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The Doppler effect and its dependence on direction explain key spectral features of the emission of bending magnets in synchrotron sources.
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