d. Set up for the data that you want to collect:
i. Active field descriptions:
• # Frames: How many frames of diffraction will be collected
• Seconds/Frame: How long the detector will be exposed for each frame
• Scan Axis #: This is which position/drive that will change between subsequent
frames
o The value “Coupled” requires both θ
1
and θ
2
to be the same value and they
will move equally to create the desired 2θ value.
• Frame width: How much the scan axis will change between each frame.
• Mode: Usually “STEP”
• Rotate Sample: This will control whether or not the sample will rotate about Phi
during data collection
o This is helpful if you have a highly textured sample or one with large grains
• Sample Osc: What position (s), if any, will oscillate during data collection
o This is useful for collecting x-ray data over a larger area of the sample to
improve particle statistics for samples with larger grains
• Amplitude: How much the axis will oscillate during data collection
o The amplitude value is the distance from a zero position (i.e. an amplitude
value of 0.5 would oscillate the sample 1 mm due to the ±0.5mm amplitude))
• Frame Header Information
o This is not necessary when creating a file name (it is only viewed in GADDS)
o Misc. information that will be attached to your data for record keeping
purposes
• Filename generation: “Job name”_“Run #”_“Frame #”
o Used to auto generate a filename
o Change as needed (the “grayed-out” File name is how it will appear in the
project folder)
• Max display counts: This controls the intensity scale during the real time display
of data
• □ Realtime Display: This shows how the x-rays are being collected in real time
• □ Pre-clear: This provides a clear screen at the beginning of each frame.
• □ Capture video image: This will attach an image to your data files (as seen in
the Laser-Video system)
• □ Auto Z align: Never check this option. This finds the correct z-height of your
sample automatically (it is better to do this manually, as in the previous steps)
ii. Typical SingleRun setting for a new user is shown below (this will collect data from
about 15° ≤ 2θ ≤ 105°)
NOTE: When setting up a scan to collect data, be sure to consider where you expect diffraction peaks to
appear (as in the PDF). It is not good practice to integrate the same peak in two different scans.
• # Frames: 3
• Seconds/Frame: 60-300
1. Θ
1
: 15°
2. Θ
2
: 15°
3. Phi: Use “@” (this tells the program to display the current axis value that was
predetermined with the Laser-Video system)
4. Psi: 0
5. X: Use “@”
6. Y: Use “@”
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