Conserving the Coherence and Uniformity of Third-Generation Synchrotron Radiation Beams: the Case of ID19, a `Long' Beamline at the ESRF

This paper reports on the problems encountered and the actions taken at a third-generation synchrotron beamline in order to retain a homogeneous beam and good coherence

High-Focusing Bragg-Crystal Polychromator Design for Energy-Dispersive X-ray Absorption Spectroscopy

The design and characterization of a contoured crystal polychromator for energy-dispersive EXAFS is presented. It gives a full spot between 20 and 40 µm full size in the 5–12 keV energy range.

Anomalous Wide-Angle X-ray Scattering Apparatus on the GILDA Beamline at the ESRF

A description of the experimental apparatus for anomalous wide-angle X-ray scattering (AWAXS) on the GILDA beamline at the ESRF is given.

Station 16.3: a High-Resolution Single-Crystal Diffraction Facility at the SRS, Daresbury

The design of a high-resolution single-crystal diffraction facility at the SRS, Daresbury Laboratory, is outlined. Several experimental examples are given, including a study of magnetoelastic strain in ferromagnetic US.

Angular Resolution of Parallel Foils on a Synchrotron Powder Diffractometer

A comparative study of the resolution function for 100 µm- and 200 µm-spaced parallel-foil collimators for high-resolution powder diffraction at the synchrotron X-ray source, Daresbury Laboratory.

DAFS Experiments with Non-Centrosymmetric Single Crystals

It is shown for the first time that, similar to single-crystal structure analysis, the lack of inversion symmetry has significant impact on the DAFS signal, so that DAFS may contribute to structure analysis as well.

High-Pressure Solution X-ray Scattering of Protein Using a Hydrostatic Cell with Diamond Windows

A hydrostatic pressure cell (maximum pressure 700 MPa) with synthetic diamond windows is applied to quantitatively measure small-angle X-ray scattering of lysozyme at high pressure.

SEDEM, a Software Package for EXAFS Data Extraction and Modelling

These DOS-Windows running programs for X-ray absorption analysis are written to give the user a tool to undertake all steps of data processing and modelling, rather than making use of the most recent programming facilities. They are in use at the Collaborative Research Group on Interfaces, at the ESRF in Grenoble, France.

Quarter-Wave Plates and X-ray Magnetic Circular Dichroism on ID24 at the ESRF

The first XMCD measurements carried out on the ID24 energy-dispersive XAS beamline at the ESRF are reported. Circular-polarized X-rays are obtained using perfect diamond crystals as quarter-wave plates.

Characterization of Thin Polymer Films by X-ray Reflectometry with Synchrotron Radiation

X-ray reflectivity measurements with a synchrotron radiation source were carried out for thin polymer films on a glass plate. The film thickness and surface and interface roughnesses were determined by curve fitting and Fourier transform procedures.

Synchrotron X-ray Imaging of the Electron Density in RFeO₃ (R = Y, Ho) Using an APD Detector

The deformation electron densities (Δρ) have been determined for synthetic orthoferrites, RFeO₃ (R = Y, Ho), using both scintillation and fast avalanche photodiode (APD) detectors for focused synchrotron X-radiation at wavelengths of 0.70 and 0.84 Å. The APD Δρ images indicate strongly that the electron density is perturbed significantly by the cation–cation magnetic interactions.

Multiple solutions in data fitting: a trap in EXAFS structural analysis and some ideas to avoid it

A possible source of error on interatomic distance determination in EXAFS multishell data analysis is described.

New synchrotron source in the UK

Forthcoming meetings and short courses