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Manual Calibration

For images where the beam centre is off the detector, there are few complete rings or there is a high tilt, try Manual Calibration (requires starting guess for energy and experimental geometry)

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Advanced Settings

There are 5 Options in the advanced settings:

Radius from the beam centre ignored - During automatic calibration, scattering around the beamstop can interfere with the peak detection, this value can be adjusted if first ring is very close to the beam stop or if scatter is interfering with the ring finding.

Set Minimum spacing for ring detection - The ring finding routine will skip rings that are very close together (to make the ring finding more robust), if the calibration pattern only has close spaced rings adjust this value to increase the number of rings found.

Number of points to find on each ring - How many points the ring finding tries to use.

Max search distance - Distance along the radius that is used for the peak fitting which finds the point on the ring. Reduce this number if the ring spacing is very close or there are rings in pattern which are not from the standard.

Fix the Detector Roll (beta)- The calibration routines produce a tilt angle and tilt angle rotation for the detector which map onto Yaw and Roll. If you know your detector is mounted with a roll of 0 or 45 degrees you can fix the roll value to get the full orientation of the detector relative to the sample.

Scripting Automatic Calibration in Jython

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Configuring a new calibration standard

In progress....