Convert to q space

Select the file 5151 from the file list. This file was acquired at an angle of \({\rm gamma} = -0.75\) degrees. Choose the correct Beamtime (e.g., Tutorial.mat) and the corresponding Experimental Setup (e.g., gamma -0.75).

Configure the Toolbox window

1. In the Toolbox window, select the entry q in the Space frame.

2. Click the Full button to automatically rescale the x and y axes.

3. Change the Intensity Scaling to Log.

In the Parameters frame, enter the angle of incidence (referred to as \(\rm thetai\) in the notebook) in the field labeled omega. For this file, input the value \(0.12\).

You may notice thin black lines appearing on the image when switching to q space. To remove these lines without affecting the image quality, adjust the Horizontal parameter in the Regridding frame. A value of 1000 works well for this dataset. Your result should resemble the following:

Note on the correction factors

GIDVis provides various correction factors. If you wish to apply them, refer to the GIDVis manual and ensure you fully understand the physical meaning of each factor. Generally, if you are not comparing peak intensities but focusing solely on peak positions, these corrections are unnecessary.

Change the experimental setup for each file

For file 5152, acquired on the same sample but at an out-of-plane angle of \({\rm gamma} = -1.4\) degrees, you need to use the appropriate Experimental Setup.

1. In the Load File window, click on the scan 5152.

2. Select the Experimental Setup named gamma -1.4.

3. In the Toolbox window, click Full to rescale the axes.

The processed result should look like this: