Generating Precession Images in CrysalisPro

If you want to generate unwarped precession images for synchrotron data collection, you can do this in CrysalisPro (CAP).

For general instructions on how to import and process your data in CAP, see here: Reprocessing CX data with CrysalisPro

After finding the unit cell and refining the instrument model, follow these steps:

1. Open the Lattice Wizard, and click Unwarping - Precession images

2. This will show you information about the orientation matrix of your data:

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3. Click Next. You can edit the number of runs, but it will likely just be one.

4. Click Generate Layers and click ok. This will add the default layers (0kl, h0l, hk0) to the list.

5. If you want to add any new layers, click New Layer and enter the hkl values you want in the box that has 0 0 0.

6. Click Generate Layers. Check the background correction setting to see if you are happy with them. Generally you can stick with the defaults.

7. Wait awhile for it to run.

8. The precession images produced will be saved in a subfolder called unwarp. You can open them with frameview, which is part of the CAP installation.

9. You can cycle through the images generated and change the table and colour settings it stylise them how you like. Then use File > Save As to save as a normal image file (tiff, png etc).

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