ID21 - X-ray Microscopy Beamline

ID21 X-ray Microscopy Beamline

The X-ray micro-spectroscopy beamline ID21 enables identification down to a few ppm, and localization with a submicron beam of various elements, and with a higher sensitivity for low Z elements, from Na to Cu. These elemental imaging can be completed with spectroscopic analysis, performed on single points or as 2D images as well. The submitted proposals are mainly in the field of Environmental Science, Life Science and Cultural Heritage. Typical scientific questions concern the co-localization and/or speciation of trace elements in heterogeneous matrix at the micron scale.

ID21 Users Guide
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Tel: +33(0)47688 +ext
Fax: +33(0)476882542

Marine COTTE,
Scientist in Charge
Murielle SALOME,
Beamline Operation Manager
Control Room: 2607
E-mail: ID21


The ID21 X-ray microscopy beamline at the ESRF houses two microscopes: a Scanning X-ray Microscope (SXM) and an infra-red microscope (SR-FTIR microscope).

The SXM is designed for use over a relatively wide spectral range from 2 - 9.2 keV giving access to absorption edges from a wide range of elements of interest in life, materials and environmental sciences. For further details, please see the following periodic table. The microscope is designed to accept, apart from conventional absorption contrast imaging, a variety of complementary imaging modes, in particular spectromicroscopy using both fluorescence imaging and scanning of the primary X-ray probe energy for XANES imaging. The SXM itself works comparable to the different known scanning microscopes: The source - in this case the storage ring radiation emitted by the insertion device - is demagnified by a zone plate or a Kirkpatrick-Baez mirrors system into a focal spot with a diameter below 1 micron. The sample is aligned in the focal plane of the focusing optics and is scanned across the focal spot. The different signals from interaction of X-rays with matter like fluorescence, absorption or XAS can be detected with high spatial resolution.

Scientific Applications

Life science (imaging of trace metals in biological samples, medicine...)

Environmental science (soils, plants, geology with problems of pollution, phytoremediation...)

Cultural Heritage (rediscovering lost artistic processes, understanding alteration mechanisms)

Material science (solar cells, glasses...)

Techniques available

Micro-X-ray fluorescence

Micro-X-ray absorption spectroscopy 

FTIR micro-spectroscopy



Complementary Information