Slide 5 of 27
It is always worthwhile spending some time prior to the full data collection to determine sensible parameters for the data collection. For example;
- are you using the full area of the detector?
- does useful diffraction go beyond the edge of the detector? Does it stop halfway to the edge?
- check for overloads - are there a lot? Are you using the full dynamic range of the detector? Consider a low and a high-resolution pass. Increase or decrease the exposure time.
- check that the predicted spots do coincide with their positions on the image(s); is your initial estimate of the mosaicity realistic?
Remember to use prior information! If you have experience of your particular sample or experimental setup, use your knowledge. If something looks odd, investigate it.