Figure 5
Relative S/N enhancement due to the Lorentz factor and multiplicity of measured reflections for a 180° sweep on a triclinic crystal. Simulation parameters are as for Fig. 4 , except that the limit resolution is 1.0 Å, giving a maximum reflection angle 2θ of 30°. The half-sphere of unique reflections is seen from above the cusp of missing reflections (top) and from the middle of the sphere of reflections (bottom). Reflections are grouped into equi-populated, colour-coded bins, with median enhancement factors (Lorentz times multiplicity) for each bin as shown in the figure. The most intense white point has an enhancement factor of 105. The grid of lower intensity points on the bottom and the red circles visible on the top figure reflect the image of the detector-module gaps, where the reflection redundancy is 1 instead of 2. Enhancement factors increase for a given reflection as one moves closer to the rotation axis until the cusp is reached. |