Bruker Anton Paar - Optimizing Theta, Two Theta and Psi; Optimizing Theta; Figure 8.14: Rocking Curve to Align the Angle Theta (or Omega in HR Mode) between Source and Sample

Installation and Operation of the DCS 350 and DHS 1100 Chambers
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8.6.2 Optimizing Theta, Two Theta and Psi
Alignment of additional motor positions (Psi, Theta, Two Theta, etc.) can make sense for
e.g. single crystal heating or cooling experiments.
Pre-alignment of the sample is necessary before starting the experiment. Further opti-
mizations can then be performed automatically by the software at each temperature if the
aligned positions are transferred to or edited in the WIZARD in HR-XRD mode.
8.6.2.1 Optimizing Theta
1. Move the diffractometer to a known Bragg peak of your sample.
2. Perform a rocking curve scan with open detector (LYNXEYE) or without detector slit
(0D detector).
3. Move theta to the peak position found in this scan.
Figure8.14: Rocking curve to align the angle theta (or omega in HR mode) between source and
sample