The ID01 beamline at the ESRF: the diffuse scattering technique applied to surface and interface studies

One of the most remarkable characteristic of the ID01 beamline is tie: absence of windows in the beam path up to the diffraction detection stage. This feature combined with the presence of a wiggler and an undulator as insertion devices allows diffraction experiments with a large energy range (from 2.1 keV up to 35 keV). This means that a large number of absorption edges of different elements can be reached which enable one to profit from the anomalous behaviour of their scattering factors. A 4 + 2-circle diffractometer is mounted inside a vessel that can be put under vacuum in order to decrease the background noise signal. The experimental set-up combines several kinds of detectors that allows one to combine SAXS and WAXS experiments. All these characteristics make the ID01 beamline very suitable for the study of the morphology of the surface and the interface of a large range of materials. (C) 2000 Elsevier Science B.V. All rights reserved.