LUCIA (Line for Ultimate Characterisation by Imaging and Absorption) beamline is a "tender" (0.8-8 keV) X-ray microprobe with capabilities for chemical speciation by X-ray absorption spectroscopy (µ XAS) and for elemental mapping by X-ray micro-fluorescence (µ XRF). It allows the possibility to measure heterogeneous samples at a micronic size and to combine these two element-specific and non-destructive techniques.

A monochromatic beam of µm size is incident on a sample which is carried on a scanning x-z stage. µ XRF shows the location of the elements, their relative abundances, and with which other elements they are associated. One can take advantage of the monochromatic beam which allows to separate out different elements by their absorption edges. After a cartography of the sample by fluorescence, interesting spots can be analyzed by XAS to determine the speciation (local chemistry, quantitative determination of the local geometric structure around the absorbing atom) of the elements and how this depends on the different components. 

µ-XRF and µ-XAS can be combined with other microtechniques like Raman spectroscopy to give complementary informations on the sample. The energy range offered by the beamline corresponds to the best performances of SLS and SOLEIL in terms of brilliance. It allows XAS experiments at the K edge of elements from Na to Fe, L edges from Ni to Gd, and M edges of rare earths and actinides.

Beamline Resolving Power
3500 [deltaE/E] @ 1 [eV]
2500 [deltaE/E] @ 2 [eV]
Beamline Energy Range
0.8 - 8 [eV]
Max Flux On Sample
8 * 1010 [ph/s] @ 4 [eV]
Spot Size On Sample Hor
2.5 - 1000 [um]
Spot Size On Sample Vert
2.5 - 1500 [um]
Photon Sources

HU52

Type
Undulator
Variable Polarization
Yes
Number Of Periods
32
Monochromators

Monochromator

Type
double crystal monochromator built by Kohzu. Its design is based on a double cam which provides a fixed exit geometry and covers a large angular range (5o- 75o). Up to five different crystals, namely KTP(011), MGM (Multilayer Grating Monochromator), InSb(111), Si(311) and Si(111) fit into the water cooled holders.
Techniques
Absorption
  • EXAFS
  • NEXAFS
Imaging
  • Fluorescence imaging
  • X-ray microscopy
Disciplines
Chemistry
  • Atoms, molecules, clusters and gas-phase chemistry
  • Catalysis
  • Electrochemistry
Earth Sciences & Environment
  • Technique Development - Earth Sciences & Environment
Humanities
  • Cultural Heritage
Life Sciences & Biotech
  • Medicine
  • Protein and macromolecular structures
Material Sciences
  • Technique Development - Material Sciences
Physics
  • Matter under extreme conditions, warm dense matter, plasmas
  • Surfaces, interfaces and thin films
control/Data analysis
Control Software Type
  • Igor
Data Output Type
  • spectra, images
Data Output Format
  • ascii, igor, nexus
Softwares For Data Analysis
  • commercial igor athena, ...
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