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SixS (Surfaces interfaces x-ray Scattering) is a wide-energy range (5 -20 keV) beamline dedicated to structural studies of interfaces (gas-solid, solid-solid or solid-liquid), as well as nano-objects.

SixS (Surface Interface X-ray Scattering) is a beamline dedicated to the study of X-ray scattering from surfaces and interfaces of hard and soft matter in various environments in the 5-20 keV energy range. To be sensitive to the surface all the studies will be performed in grazing-incidence geometry. The beamline will be equipped with two experimental hutches, which will be dedicated to the study of surfaces, interfaces and nano-objets prepared:

  • in-situ under UHV (Ultra High Vacuum, i.e. 10-10 mbar) conditions. A diffractometer will allow to measure X-ray scattering from samples under UHV;
  • in various environments (catalysis chambers, soft matter, electrochemical cells). A diffractometer coupled with exchangeable chambers will be able to measure X-ray scattering from sample surfaces both in vertical or horizontal geometries.

Grazing Incidence X-ray Diffraction (GIXD), Grazing Incidence Small Angle X-ray Scattering (GISAXS), anomalous surface X-ray scattering, X-Ray Reflectivity (XRR), magnetic surface X-ray scattering and coherent scattering experiments will be performed on both the facilities.


COATI Alessandro
RESTA Andrea
VLAD Alina
VOISIN Benjamin

Chercheur associé

Yves Garreau


Données techniques

Gamme en énergie

5 keV - 20 keV

Résolution en énergie

E/ΔE ~ 10-4 à 20 keV


In-vacuum U20 undulator.
Source Size (sigma, μm): 388 (H) x 8.1 (V)
Source Divergence (sigma, μrad): 14.5 (H) x 4.6 (V)



Quarter-wave plate (to be installed)

Fixed exit DCM Si(111)

M1, M2 mirror for harmonics rejection and vertical focussing

M3A mirror for horizontal focussing on the MED end-station (to be installed)

M3B for horizontal focussing on the UHV end-station

Environnement échantillon

Two experimental end-stations

MED:  multi-environment diffractometer

UHV: diffractometer coupled to an UHV vacuum chamber

Taille du faisceau

MED: 40(H) x 25(V) µm2

UHV: 30(H) x 30(V) µm2

Divergence faisceau sur échantillon

MED: 600 µrad (H) x 120 µrad (V)

UHV: 600 µrad (H) x 60 µrad (V)


4 x 1013 ph/s @ 6 keV

3 x 1012 ph/s @ 15 keV

Polarisation du faisceau


Thématiques scientifiques

En construction