Pilatus detector manual

One hundred and twenty one images have been acquired with the detector moving between 5 and 65 degree with a step size of half a degree. The motor position is registered in the filename. A prior manual calibration using pyFAI-calib has been performed on four images locate at Those images were the first with two rings. The control points extrated during this initial calibration has been used as a starting point for this calibration.

Then more images have been added to make the model more robust. The next cell defines 2 functions, one for transforming the geometry and the other one to read the goniometer angle from the metadata. With the first model, the refinement was not perfect on the very low angles and indicates a miss-fit.

Relaxing the constrains on rot1 allowed to spot a non perfect orthogonality between the goniometer axis and the incident beam. Releasing the distances is also possible, for example to cope with the sample not perfectly mounted on the center of the goniometer.

The the full width at half maximum can be measured an ploted as function of the scattering angle. This notebook exposes the how to calibrate the goniometer for a small detector moving on a 2theta arm.

Once calibrated, the geometry can be saved and restored and stays valid as long as the detector or the goniometer is not unmounted from the beam-line. This configuration can subsequently be used to integrate the data acquired with any sample, in minutes instead of hours. The resolution limit is now the pixel size. Fortunately, pixel detector with small pixel like the MaxiPix or the Lambda detector exists and offer higher resolution. Docs » Example of usage » Tutorials » Goniometer and translation table calibration » Calibration of a 2 theta arm with a Pilatus k detector Edit on GitHub.

Using pyFAI version 0. The dead-time interval is adjustable and is equivalent to the width of a single photon pulse. This results in non-paralyzable counting and allows for enhanced count rate correction to achieve improved data quality at high count rates.

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