There are three SAXS set-ups (SAXS-Cu, MODIX, PADIX) which differ according to the radiation wavelength and their respective accessible scattering wavevectors domain.
1. SAXS-Cu
Instrumental: Cu rotating anode generator, 2D focusing multilayer (Ni/C) multilayer optics, hybrid anti-scattering slits, hybrid pixel detector (Pilatus 200K).
Two experimental configurations (D = sample-detector distance) :
- “wide angle” : D = 250mm, 2 mm diameter beamstop, dmin = 1.5 nm, dmax = 35 nm ↔ Qmin = 1.8.10 -2 Å-1, Qmax = 4.10-1 Å-1, flux = 1.6 108 photons/s
- “small angle” : D = 1420 mm, 4 mm diameter beamstop, dmin = 9 nm, dmax = 80 nm ↔ Qmin = 8.10-3 Å-1, Qmax = 7.10-2 Å-1, flux = 1.7 107 photons/s
résolution : δq = 2.10-3 Å-1
2. MODIX
Simultaneous small and wide angle scattering measurements with Molybdenum radiation, well-adapted for measuring strong absorbing samples.
Instrumental : Molybdenum rotating anode generator, multilayer mirrors optics, hybrid anti-scattering slits, motorized autosampler, removable beamstop (two different size), flux measurement diode, MAR345 image-plate detector.
Accessible scattering wavevector domains :
- Qmin = 3.10-2 Å-1, Qmax = 3 Å-1 (large beamstop with diode)
- Qmin = 1.5.10 -2 Å-1, Qmax = 3 Å-1 (small beamstop)
3. PADIX
Instrumental : rotating Copper anode microfocus generator (Rigaku Micromax007), multilayer mirrors optics, sample translation and rotation motorized stages, CCD (MarCCD) and hybrid-pixel (XPADS70) detectors.
Accessible Q wavevectors domain : Qmin = 2.10-2 Å-1, Qmax = 5.10-1 Å-1 ↔ dmin = 1.25 nm, dmax = 31 nm