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Data Coverage In Axial Diffraction Experiments

If you perform an axial diffraction experiment, your incoming x-ray beam is parallel to the compression direction. In the figure below, we show the location of the data measured at eta=0 and eta=90 on the pole figure of the compression direction. Eta is the azimuth angle on the image plate. I personaly call it delta in my publications, but MAUD calls it eta...

	Figure 1: diffraction in axial geometry with the azimuthal angle on the image plate equals to 0. n is the normal to the diffraction plane and we report the orientation of n on the pole figure.
	Figure 2: diffraction in axial geometry with the azimuthal angle on the image plate equals to 90. n is the normal to the diffraction plane and we report the orientation of n on the pole figure.

Overall, on a pole figure of the compression direction, one diffraction ring will provide you with the following coverage

Figure 2: coverage for diffraction experiments in the axial geometry. Diffractions corresponding to azimuth angles 0, 90, 180, and 360 degrees on the image plate are located in brown on the figure.