European Synchrotron Radiation Facility
BM02 - Anomalous Scattering
D2AM - a French CRG at ESRF - is a beamline dedicated to structural investigations using anomalous scattering in materials science, with two instruments: a Kappa diffractometer and a Small Angle X-ray Scattering bench. Structural studies near absorption edges are widely used to create an anomalous contrast between atoms and to study short or long range order.
In order to achieve an easily adjustable wavelength near absorption edges between 5,5 and 35 keV, at a fixed point focus position, a symmetrical optics has been designed, installed at the output of a bending magnet. The optics consists of a two crystal monochromator with sagittal focusing (mainly Si(111) but Si(311) is also available) located between two cylindrically bent mirrors in a compact arrangement, with double focusing (3:1).
Beamline Energy Resolution
0.2 [eV] @ 10000 [eV]
Beamline Energy Range
5500 - 35000 [eV]
Max Flux On Sample
5 * 1012 [ph/s] @ 20000 [eV]
Spot Size On Sample Hor
150 - 500 [um]
Spot Size On Sample Vert
100 - 200 [um]
Endstations or Setup
kappa goniometer
Description
The KAPPA diffractometer for Materials Science is driven with the spec-kappa geometry. It leaves a large free space to adapt the sample environment. For the detection, vertical rotation axis NU and horizontal axis DELTA (-5°, + 130°) can carry an optional vertical analyzer. All the angular motions have a resolution lower than 0.001°, the confusion sphere being smaller than 0.06 mm. Using a Si (111) analyzer, FWHM less than 0.02° (2THETA) should be reached with powder samples. An optional goniometer-head (two translation on top of two cradles) is available on top of the kappa head for surfaces applications.
Detectors Available
IMXPAD-S70
IMXPAD-S540
KETEK-SDD
IMXPAD-S540
KETEK-SDD
Endstation Operative
Yes
Sample
Sample Type
Crystal, Amorphous, Powder
Manipulator or Sample stage
Description
motorized goniometer-head : two translation on top of two cradles
Degrees Of Freedom
4
Translator Stages
2
Cradles
2
Description
simple sample holder on which a manual Huber goniometer head can be adapted
Degrees Of Freedom
5
Translator Stages
3
Cradles
2
saxs bench
Description
the SAXS bench is a 4 m-long granite table installed after the kappa diffractometer. Along the beam direction, this table is mainly used for SAXS experiments where motorized sample stages, specific sample vessels, and detector holders can be set up at any position.
Detectors Available
IMXPAD-S540
IMXPAD-WOS
IMXPAD-WOS
Sample
Sample Type
Crystal, Powder, Gel, Liquid
Mounting Type
capillary, closed cells, others (more details on our web site)
Detectors
IMXPAD-S540
Type
photon counting 2D Detector with XPAD chip
Pixel Size
X = 130 [um], Y = 130 [um]
Array Size
X = 960 [pixel], Y = 560 [pixel]
Detection
Detected Particle
Photon
IMXPAD-S70
Type
photon counting 2D Detector with XPAD chip
Pixel Size
X = 130 [um], Y = 130 [um]
Array Size
X = 120 [pixel], Y = 560 [pixel]
Detection
Detected Particle
Photon
IMXPAD-WOS
Type
photon counting 2D Detector with XPAD chip
Description
active area 15x9cm² with a 10 mm hole for simultaneous SAXS measurement on the S540
Pixel Size
X = 130 [um], Y = 130 [um]
Array Size
X = 1120 [pixel], Y = 600 [pixel]
Detection
Detected Particle
Photon
KETEK-SDD
Type
energy resolved point detector
Description
energy resolution 133 eV at 6 keV , active area 50 mm²
reference : AXAS-M1 cube SDD
reference : AXAS-M1 cube SDD
Detection
Detected Particle
Photon
Techniques
Diffraction
- Crystallography
- Powder diffraction
- Surface diffraction
Emission or Reflection
- X-ray fluorescence (XRF)
Scattering
- Elastic scattering
- Small angle scattering
- Wide angle scattering
Disciplines
Engineering & Technology
- Aeronautics
- Nanotechnology & production processes
Humanities
- Cultural Heritage
Material Sciences
- Knowledge based multifunctional materials
- Metallurgy
- Other - Material Sciences
Physics
- Hard condensed matter - structures
- Soft condensed matter physics
- Surfaces, interfaces and thin films
control/Data analysis
Control Software Type
- SPEC
Data Output Type
- spectra, images
Data Output Format
- ascii , edf
Softwares For Data Analysis
- Python-based short scripts were written by beamline scientists to perform specific treatments, such as the conversion from angular to reciprocal space, azimuthal integrations and correction of distortions induced by the detectors’ geometries, data visualization (3D maps, cuts), and fittings. Software developed at the ESRF and at the beamline by the D2AM scientists are routinely used to perform such treatments: Pymca, PyFAI (Fast Azimuthal Integration using Python) suite, XSOCS, SILXS.
Equipment That Can Be Brought By The User
contact the beamline scientists
