Viewing Diffraction Images

There are a low-resolution images of the diffraction patterns for each data collection, which are displayed in ISPyB. These are useful to see ice rings, as well as other factors that may affect data quality. It should be emphasised that the image-resolution of this viewer is not high, and thus it should not be used to judge the resolution of the diffraction. Alternate viewers are better suited for this purpose and they are discussed below.

First click the preview to open the viewer:

This brings up the diffraction image viewer:

Within the viewer, it is possible to threshold original images, which can be useful for viewing spots:

Which gives:

If the original data cannot be accessed off disk, only low resolution previews will be available:

Diffraction from ice tends to form strong, distinct spots in rings.

This can be confirmed by ticking the 'Ice Rings' box and seeing if the candidate diffration aligns.

Fast detectors mean that fine-slicing data is possible - looking at wedges of data from fractions of a degree of rotation, which can increase the resolution. However, this means that it is hard to see diffraction spots on individual data images. Therefore, it is worth viewing a series of images together as a slab, which would require an alternative viewer.

To view the diffraction images in full, an alternative viewer is needed. The main ones avaiable at Diamond (and how to access them on the Diamond computing system) are listed below: