In addition to reducing the beam divergence, you may wish to use a smaller beam 
size by using a smaller collimator or making the slits smaller.  A smaller 
crystal can also help to spatially separate the Bragg spots as can moving the 
detector closer to the crystal. Yes, closer to the crystal.  This is not 
intuitive, but arises since modern homelab beams are not parallel but are 
diverging from a focal point near the sample position.  It is just something 
else you may wish to try.

How you flashcool your sample will also have a large effect on the spot 
sizes/shapes.

Jim

>.....
>Another thing:  most in-house sources allow you to reduce divergence of the 
>beam.  You lose intensity, >but no matter, just expose longer.  That also 
>improves overlap.
>
>Cheers
>phx

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