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Preview: Forthcoming in Journal of Synchrotron Radiation

Forthcoming article in Journal of Synchrotron Radiation



Synchrotron radiation research is rapidly expanding with many new sources of radiation being created globally. Synchrotron radiation plays a leading role in pure science and in emerging technologies. The Journal of Synchrotron Radiation provides comprehen



 



Thickness-dependent structural characteristics for a sputtering-deposited chromium monolayer and Cr/C and Cr/Sc multilayers
A systematic characterization of Cr monolayers and Cr/C and Cr/Sc multilayers as a function of layer thickness is presented. The interior structure, morphology, ligand surrounding and thermal stability are determined in order to understand the initial growth and interfacial characteristics of Cr-based layers.



Simulations of X-ray diffraction of shock-compressed single-crystal tantalum with synchrotron undulator sources
Simulated X-ray diffraction patterns of shock-compressed single-crystal tantalum for polychromatic synchrotron undulator sources at different shock velocities and detection geometries are presented, along with their interpretation.



Characterization of the surface contamination of deep X-ray lithography mirrors exposed to synchrotron radiation
Wet chemical development of exposed resist, and beam calorimetry, are applied to determine the surface condition of grazing-incidence mirrors exposed to synchrotron radiation. Using this technique, the mirror reflectivity can be assessed without directly probing the surface and without the need for spectral analysis.






High-speed tomography under extreme conditions at the PSICHE beamline of the SOLEIL Synchrotron
An experimental setup has been developed in order to perform ultrafast X-ray tomography at high pressure and temperature. Pink beam projected through a standard Paris–Edinburgh press and an algebraic reconstruction technique were used in order to acquire a tomograph in about 10 s.



Sample cell for studying liquid interfaces with an in situ electric field using X-ray reflectivity and application to clay particles at oil–oil interfaces
A sample cell for studying liquid interfaces with an in situ electric field using X-ray reflectivity and its application to clay particles at oil–oil interfaces is described.



A sagittally confined high-resolution spectrometer in the `water window'
An original scheme has been formulated to a broadband X-ray spectrometer with excellent resolving power throughout the whole spectral range, while the sagittal spot size is well confined to enhance the detection efficiency. The intrinsic optical nature and the most fundamental problems in the system have been comprehensively investigated.



Study of melanin localization in the mature male Calopteryx haemorrhoidalis damselfly wings
Infrared (IR) microspectroscopy coupled with the highly collimated synchrotron IR beam was employed to identify the pigment distribution in the wings of Calopteryx haemorrhoidalis at a high spatial resolution.



Wavelet processing and digital interferometric contrast to improve reconstructions from X-ray Gabor holograms
A methodology based on wavelet transformation and digital interferometry is proposed to obtain the most essential information from X-ray Gabor holograms.



Investigation of the multiplet features of SrTiO3 in X-ray absorption spectra based on configuration interaction calculations
Configuration interaction cluster calculations are a powerful tool for understanding the multiplet structures of the Ti L2,3-edges absorption spectrum of SrTiO3 which yields different energy parameters representing the ground state properties. Simulated absorption spectra with different linearly polarized photons under various tetragonal crystal fields reveal a non-linear orbital–lattice interaction, which, in combination with a detailed analysis of the spectral shifts in different tetragonal crystal fields, offers a theoretical guidance for material engineering of SrTiO3-based thin films and heterostructures.



Quanty4RIXS: a program for crystal field multiplet calculations of RIXS and RIXS–MCD spectra using Quanty
Documentation of the Quanty4RIXS program is presented with instructions for setup and usage.



XFEL experiments: jitter of pump–probe time delays and pulse intensities
Jitter of XFEL signals due to fluctuations in shot-to-shot time delays and intensities are explored in the frame of a statistical theory of X-ray diffraction from liquids.



Pulse intensity characterization of the LCLS nanosecond double-bunch mode of operation
Details and performances of a transmissive pulse intensity diagnostic for the LCLS `nanosecond double-bunch' mode are presented.



Effects of soft X-ray radiation damage on paraffin-embedded rat tissues supported on ultralene: a chemical perspective
The radiation damage on biological tissues as a result of soft X-rays is assessed, focusing on the effects upon the embedding and supporting media that can influence further analyses.



Development of an X-ray imaging system to prevent scintillator degradation for white synchrotron radiation
An X-ray imaging system has been designed to overcome the challenges from the high flux of white-beam radiation, including degradation of image quality caused by accumulated contamination on the scintillator during intense X-ray exposure.






The fractional Fourier transform as a simulation tool for lens-based X-ray microscopy
The fractional Fourier transform for numerical wavefront propagation has been adapted for use with X-rays, which alleviates the strict sampling requirements encountered in typical Fourier optics. This approach also allows wavefront propagation through multiple lenses in a single transform, and that property is leveraged in two numerical examples for compound refractive lenses.



Synchrotron X-ray microbeam dosimetry with a 20 micrometre resolution scintillator fibre-optic dosimeter
A scintillator fibre optic dosimeter with a one-dimensional spatial resolution of 20 µm has demonstrated the ability to resolve synchrotron X-ray microbeams.



Influence of the core-hole effect on optical properties of magnesium oxide (MgO) near the Mg L-edge region
Optical constants of MgO thin film in the energy range 40–300 eV are reported and the influence of the core-hole effect on the optical constants near the Mg L-edge region are discussed.



Quantitative study of the influence of swimming therapy on osteoporosis rat models based on synchrotron radiation computed tomogaphy
By histomorphometry analysis and finite-element analysis, the effects of different intensities of swimming exercise were studied in ovariectomized rat models. The results showed that swimming can alleviate the decrease of bone strength induced by estrogen deficiency, and moderate-intensity swimming was found to have the most significant effect.



SLS-2 – the upgrade of the Swiss Light Source
The plans for an upgrade of the Swiss Light Source are presented, covering the storage ring lattice concept, the accelerator component designs, the insertion device developments and the science potential of the upgraded facility.



X-ray beam-position feedback system with easy-to-use beam-position monitor
Details and capabilities of an X-ray beam-position monitor and feedback system incorporating a diamond-fluorescence screen for wide detection are presented.



Hybrid modelling of a high-power X-ray attenuator plasma
A hybrid model describing the X-ray absorption by a gas attenuator using argon and the subsequently generated plasma is presented. The model is able to reproduce the spatial distribution of the excited stated measured experimentally, as well as the decrease of the gas density along the attenuator axis.



First-principles X-ray absorption dose calculation for time-dependent mass and optical density
Calculation of the X-ray irradiation dose is developed from first principles. For absorption dependent on photon energy and time, and sample mass dependent on time, the dose integral is formulated. Exact, approximate and asymptotic expressions are evaluated and applied to scanning transmission soft X-ray microscopy radiation damage experiments.



Beam-induced redox transformation of arsenic during As K-edge XAS measurements: availability of reducing or oxidizing agents and As speciation
Both beam-induced oxidation and reduction occur during As K-edge XAS measurements. The coexisting oxidizing and reducing agents and the solid-phase As speciation were found to be important factors in determining the vulnerability of As to beam-induced redox transformation.



A scanning transmission X-ray microscope at the Pohang Light Source
A scanning transmission X-ray microscope operational at the Pohang Light Source is described.



Magnetic assessment and modelling of the Aramis undulator beamline
The design, the magnetic optimisation and the characterisation of the Aramis undulators are presented. The SUBLIME model integrates all the information gained during the series production and the test campaign to operate the Aramis undulator beamline, including phase matching and orbit correction.