BM30
Synopsis
FAME is dedicated to X-ray absorption spectroscopy. FAME covers a wide variety of scientific fields, materials science, biophysics, chemistry but focuses mainly in geochemical sciences where, in most cases, the probed elements are highly diluted.Disciplines
- Environmental Sciences
- Earth and Planetary Sciences
- Chemistry
- Life Sciences
- Physics
- Materials and Engineering
- Cultural Heritage
Applications
- Hydrothermal fluids
- Mineralogy
- Geochemistry and soil (speciation of heavy metals in a natural or polluted soil)
- Geochemistry and biological systems (cells, plants etc. in relation to toxicological studies, phytoremediation etc.)
- Structural biology
- Catalysis
- Electrochemistry
- Physic and material sciences
Techniques
- XAS - X-ray absorption spectroscopy
- EXAFS - extended X-ray absorption fine structure
- XANES - X-ray absorption near-edge structure
- XRF - X-ray fluorescence
Energy range
- 4.8 - 40.0 keV
Beam size
- Minimum (H x V) : 200.0 x 100.0 µm²
- Maximum (H x V) : 200.0 x 100.0 µm²
Sample environments
- Large volume high-pressure/high-temperature vessel (0-1500 bars; 20-1200°C)
- Operando catalysis reactor with remote gas control system
- Liquid helium cryostat (5-300K)
Detectors
- 16-element Ge solid state detector (Mirion) for fluorescence measurement
- Silicon drift detectors (Vortex) for fluorescence measurement
- Si diodes (Hamamatsu) for monitoring and transmitted intensity measurements
Technical details
FAME was constructed to meet scientific requests coming primarily from the geochemistry community, in particular environmental sciences. X-ray absorption spectroscopy is an essential tool in this research domain in terms of sensitivity and selectivity (elements of interest are often diluted, long-range order can be limited): it yields crucial information, in particular, speciation. From the beginning, in 2002, the technical emphasis of FAME was directed at determining atomic environments at very low concentration, with an optimal resolution.
[1] Proux et al., "FAME: A new beamline for X-ray absorption investigations of very-diluted systems of environmental, material & biological interests", Physica Scripta 115 (2005) 970-973.
[2] Proux et al., "Feedback system of a liquid-nitrogen-cooled double-crystal monochromator: design and performances", Journal of Synchrotron Radiation 13 (2006) 59-68.
[3] Hazemann et al., "High-resolution spectroscopy on an X-ray absorption beamline", Journal of Synchrotron Radiation 16 (2009) 283-292.