If the distance between the sample and anti-air scatter screen is kept constant through out my experiment whether there will be any beam cut at higher 2_theta angles. I am using Bragg-Brentano Geometry for my data collection.
Ian J Slipper
The anti-air scatter screen, or what Bruker call a knife edge, is only effective much below 20 degrees 2-th; above this it has little effect on the signal. At the height I have mine set (parallel beam) it will block the signal when approaching 80 to 90 2-th. This will depend on the optics used. A motorised screen would enable data to be collected continuously from low to very high angles by withdrawing the screen (increasing the distance). But if you don't measure those high angles, you don't need a motorised screen.
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