Diamond Light Source
Beamline I22 - Small Angle Scattering & Diffraction

The high brilliance of the insertion device source on I22 allows structural investigation of materials under extreme environments (for example fluid flow at high pressures and temperatures). I22 provides reliable access to millisecond and shorter time scales, essential to understanding kinetic processes such as early folding events in proteins or structural evolution in polymers and colloids.

Simultaneous recording of both small and wide angle X-ray scattering (SAXS and WAXS) techniques in combination allows users to probe length scales ranging from a few Angstroms to several microns with high resolution.

Key Advantages of I22:

  • High flux: essential for SAXS studies of oriented samples.

  • High resolution tuneable energy: Useful for a range of sample environments including Pressure Studes.

  • Minimum beam divergence: critical for Ultra Small Angle X-ray Scattering (USAXS)

  • Partial 2D WAXS capability

  • Microfocus capability available. This is scheduled in blocks during the AP's as a purpose built end station is installed to carry out the technique.

  • Grazing Incidence SAXS (GiSAXS). This is scheduled in blocks during the AP's as a purpose built Sample platform is installed to carry out the technique. Full access to I22's camera length range is available in this mode



Beamline Energy Resolution
1.66 * 10-4 [meV] @ 10 [eV]
Beamline Energy Range
7 - 20 [keV]
Max Flux On Sample
6 * 1012 [ph/s] @ 12.4 [eV]
Spot Size On Sample Hor
12 - 2500 [um]
Spot Size On Sample Vert
6 - 1300 [um]
Nick Terrill
  • Powder diffraction
  • Elastic scattering
  • Small angle scattering
  • Time-resolved scattering
  • Wide angle scattering
control/Data analysis
Control Software Type
  • GDA
Data Output Type
  • Images plus Experimental parameters where appropriate Temp., pres., etc.
Data Output Format
  • NeXuS files (HDF5) Standard with options for SAS XML, ASCII and BSL
Softwares For Data Analysis
  • DAWN for Data Reduction