Three-dimensional chemical mapping by scanning transmission X-ray spectromicroscopy

Three-dimensional chemical mapping using angle-scan tomography in a scanning transmission X-ray microscope is demonstrated and used to quantitatively map a low-density polyacrylate inside submicrometer polystyrene microspheres in water with 50 nm spatial resolution.

Combining two structural techniques on the micrometer scale: micro-XAS and micro-Raman spectroscopy

This paper describes the experimental set-up developed on the LUCIA beamline in order to perform at the same time X-ray and Raman spectroscopy experiments on the same microsized sample spot. Some applications of these two combined techniques on mineral samples are also presented.

XAS and XMCD under high magnetic field and low temperature on the energy-dispersive beamline of the ESRF

The present paper demonstrates the feasibility of X-ray absorption spectroscopy and X-ray magnetic circular dichroism under pulsed high magnetic fields up to 26 T and low temperatures down to 5 K on the ID24 energy-dispersive X-ray absorption spectroscopy beamline of the ESRF.

Magnetic characterization for cryogenic permanent-magnet undulators: a first result

The magnetic field of a cryo-undulator prototype has been measured using a new technique of field mapping using a Hall probe, and the error components in the field profile have been found to be insensitive to temperature.

Probing atomic displacements with thermal differential EXAFS

Differential extended X-ray absorption fine structure (DiffEXAFS) is a novel technique for the study of small atomic strains. Here the development of this technique to the measurement of thermally induced strain is presented. Thermal DiffEXAFS measurements have been performed on α-Fe and SrF₂, yielding α = (11.6 ± 0.4) × 10⁻⁶ K⁻¹ and (19 ± 2) × 10⁻⁶ K⁻¹, respectively. These are in good agreement with accepted values, proving the viability of the technique. Analysis has revealed sensitivity to mean atomic displacements of 0.3 fm.

A new FEFF-based wavelet for EXAFS data analysis

A new mother wavelet function for extended X-ray absorption fine-structure (EXAFS) data analysis has been designed, combining a model EXAFS function derived from the ab initio EXAFS code FEFF8.20 and the complex Morlet wavelet.

A novel facility using a Laue focusing monochromator for high-pressure diffraction at the SRS, Daresbury, UK

A novel Laue focusing monochromator, developed at the SRS, Daresbury Laboratory, is employed on a beamline dedicated to high-pressure diffraction experiments. Monochromator characteristics, features of the beamline design, and results from diffraction experiments are reported in this study.

Ray-trace calculations for in situ X-ray beam imaging

A ray-trace model of a two-dimensional beam-position and profile monitor is presented. The model has produced beam images and beam profiles that are in agreement with experimentally collected data.

In situ synchrotron far-infrared spectromicroscopy of a copper electrode at grazing incidence angle

The use of a grazing angle objective for high-sensitivity in situ synchrotron far-infrared spectromicroscopy in electrochemistry has been demonstrated. The oxide film on a copper microelectrode, at high anodic potential in alkaline solution, has been determined to consist mainly of CuO with a film thickness of about 130 nm.

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