There are a number of different detectors available for use on I22 and the choice of detector will depend on the type of experiment planned. A beamline scientist will be able to advise you on the best set up for your experiment if necessary.
The default detector on I22 beamline is now the Pilatus 2M.
Selecting a detector for Small Angle experiments requieres consideration of what results are required.
The different aspects to be considered are:
- Data collection Time or Frame rate
- Below 5 milliseconds
- From 5 milliseconds to 2 seconds
- Above 2 seconds
- Pixel resolution The pixel resolution can be defined by the type of experiments your are doing. Scattering or diffraction experiments will requieres different pixel resolution. While the pixel resolution is not so important for scattering experiment, you will need a very good pixel resolution for diffraction experiments.
- Q-range The q-range depends on the energy and on the sample-detector distance at which you performed the experiments. The q-range is also detector size dependant. A bigger detector will cover a larger q-range without changing the energy or the sample-detector distance during your experiments. Calibrants are available to accurately define the q-range
If you require measurement faster than 1millisecond:
- For Anisotropic samples you will need Rapid 2D
- For Isotropic samples you will need HOTSAXS or Rapid 2D