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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



 



Insight into 3D micro-CT data: exploring segmentation algorithms through performance metrics
The proposed Materials Segmentation and Metrics (MSM) dataflow provides protocols to systematically analyze and compare the results of unsupervised classification methods used for segmentation of synchrotron-based imaging. MSM offers different metrics to evaluate the performance of image segmentation algorithms in terms of quality, confidence and conformity with standards.



Local structure around In atoms in coherently grown m-plane InGaN film
The local structure around In atoms in an m-plane In0.06Ga0.94N film coherently grown on a freestanding m-plane GaN substrate was investigated by polarization-dependent XAFS measurements. A step-by-step fitting procedure was proposed for the m-plane wurtzite structure.



Nanosecond pump–probe device for time-resolved serial femtosecond crystallography developed at SACLA
A nanosecond pump–probe device for time-resolved serial femtosecond crystallography has been developed at SACLA.



Mutual optical intensity propagation through non-ideal mirrors
A simulation method based on the mutual optical intensity model is developed for simulating the propagation of partially coherent radiation through non-ideal mirrors.



Confocal depth-resolved fluorescence micro-X-ray absorption spectroscopy for the study of cultural heritage materials: a new mobile endstation at the Beijing Synchrotron Radiation Facility
The coloration mechanism of sacrificial red glaze has been investigated using confocal depth-resolved micro-X-ray absorption spectroscopy at the 1W2B beamline of the Beijing Synchrotron Radiation Facility.



In operando quantitation of Li concentration for a commercial Li-ion rechargeable battery using high-energy X-ray Compton scattering
Line-shape analysis of a Compton-scattered X-ray energy spectrum has revealed the Li concentration in a battery under in operando conditions.






Strategies for high-throughput focused-beam ptychography
X-ray ptychography is being utilized for a wide range of imaging experiments with a resolution beyond the limit of the X-ray optics used. Here, strategies for data sampling and for increasing imaging throughput when the specimen is at the focus of an X-ray beam are discussed, and the tradeoffs between large and small illumination spots are examined.



Observation of an optical vortex beam from a helical undulator in the XUV region
An optical vortex beam carrying an orbital angular momentum of l\hbar (l = ±1) per photon was produced as the second-harmonic radiation from a helical undulator. The helical wavefront of the optical vortex beam was verified though an interference experiment.



Estimating the absolute flux distribution for a synchrotron X-ray beam using ionization-chamber measurements with various filters
The absolute flux distribution for a polychromatic synchrotron X-ray beam is obtained from an extensive set of accurate filter-transmission measurements. The technique is also demonstrated for a monochromatic X-ray beam for which there is significant harmonic contamination.






Electron-bunch lengthening on higher-harmonic oscillations in storage-ring free-electron lasers
The influence of higher-harmonic free-electron laser oscillations on an electron beam have been clarified by measuring the bunch length of the electron beam.



Refurbishment of a used in-vacuum undulator from the National Synchrotron Light Source for the National Synchrotron Light Source-II ring
The refurbishment of a used in-vacuum undulator with necessary improvement for a more modern light source is described.



Simulated sample heating from a nanofocused X-ray beam
Time-resolved finite-element modelling is used to study the sample heating from intense X-ray irradiation.



Characterization of enamel caries lesions in rat molars using synchrotron X-ray microtomography
Synchrotron X-ray microtomography non-destructively maps demineralization within carious rat molar enamel. Depth profile analysis and lesion characterization reveals that many rat carious lesions possess intact surface zones that are similar in form but much thinner than those found in human caries.



Atomic pair distribution function at the Brazilian Synchrotron Light Laboratory: application to the Pb1–xLaxZr0.40Ti0.60O3 ferroelectric system
A setup for total scattering experiments at the multi-purpose XDS beamline of the Brazilian Synchrotron Light Laboratory (LNLS) is described. Also, a preliminary characterization of the Pb1–xLaxZr0.40Ti0.60O3 (x = 0.11, 0.12 and 0.15) ferroelectric system using pair distribution function analysis is presented.



Temperature-dependent thermal properties of Ru/C multilayers
Temperature-dependent multilayer structure and cross-plane thermal conductivity are measured for multilayers with different periodic thicknesses.



Analysis of the microvascular morphology and hemodynamics of breast cancer in mice using SPring-8 synchrotron radiation microangiography
Synchrotron-radiation-based microvascular hemodynamic analysis was established in this study. Tumor vasculature analysis using this method showed unique characteristics of tumor blood flow in vivo.



Phase-merging enhanced harmonic generation free-electron laser with a normal modulator
By using the natural field gradient of a normal planar undulator as the modulator field for a phase-merging enhanced harmonic generation free-electron laser (FEL), almost the same FEL performance can be achieved.