The following articles are a selection of those recently accepted for publication in Journal of Synchrotron Radiation.
Creating flat-top X-ray beams by applying surface profiles of alternating curvature to deformable piezo bimorph mirrors
A piezo bimorph mirror is deformed into three distinct re-entrant surface modifications as well as being simply defocused. A re-entrant modification with seven segments (the maximum possible for this mirror) produces an expanded beam with less striation than a simply defocused beam.
Nuclear Incorporation of Iron during the Eukaryotic Cell Cycle
Scanning X-ray fluorescence microscopy has been used to probe the distribution of S, P and Fe within cell nuclei at the new ID16 beamline. Estimates of P, S and mass signals for the chromosomal matter agree with quantitative X-ray phase contrast projection microscopy images of the same samples, while fluorescence shows Fe incorporation.
Brownian and advective dynamics in microflow studied by coherent X-ray scattering experiments
Combining microfluidics with coherent X-ray experiments enables the flow characterization of collodial suspensions in microflow of different geometries. Here, evaluation of the flow geometries, main flow directions, advective flow velocities and diffusive dynamics are presented.
A multi-MHz single-shot data acquisition scheme with high dynamic range: pump–probe X-ray experiments at synchrotrons
A time-resolved X-ray absorption spectroscopy setup has been developed and tested, comprising a synchronized MHz fiber amplifier laser system with a multi-MHz data acquisition scheme capable of detecting multi-photon events in a single X-ray photon pulse. This system permits recording time-resolved X-ray absorption spectra with quasi static signal quality.
Measuring the criticality of the `magic condition' for a beam-expanding monochromator
The effect of minor mismatch between the geometric and single-ray foci for a cylindrically bent Laue double-crystal monochromator is examined and found to be less detrimental than previously believed. Even without exact matching, the transverse coherence of the X-ray beam is not deteriorated by the system, enabling the phase-based imaging techniques critical to modern biomedical imaging experiments.
addenda and errata