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XDSGUI

19 bytes added, 08:22, 29 May 2014
Limitations: oscillation range
== Limitations ==
* The program depends on [[generate_XDS.INP]] to interpret the header of the frames, so is currently limited to Dectris (Pilatus), ADSC (Quantum), Rigaku (several types) and MAR (CCD and image plate) detectors. Other detectors need some values to be manually filled into XDS.INP - the relevant places are marked with XXX. These are detector properties (type, pixel size and number, min and max counts in a pixel), and experimental parameters like oscillation range, wavelength, distance, and direct beam position (or rather: point of detector that is closest to the crystal). For fine-tuning of detector parameters, see the [http://xds.mpimf-heidelberg.mpg.de/html_doc/xds_prepare.html detector-specific templates].
* The authors of [[generate_XDS.INP]] have made a "best effort" to provide a XDS.INP that results in the correct sign of the anomalous signal. In the case of one detector type (internally called Rigaku SMV) this requires reversal of one detector axis, and a negative DETECTOR_DISTANCE, as is found in some of the [http://xds.mpimf-heidelberg.mpg.de/html_doc/xds_prepare.html detector-specific templates]. '''For an unusual or unknown detector setup, the correct sign of the anomalous signal needs to be established and verified e.g. with a good dataset from a test crystal that has a anomalous signal.''' The authors do not take any responsibility for problems arising from incorrect sign of the anomalous signal, nor - obviously! - for any other mischief arising in or from data processing.
* At some beamlines, the ROTATION_AXIS should be -1 0 0 ("backwards") instead of the usual 1 0 0 ("horizontal"), or even 0 1 0 ("vertical") like at one of the PETRA Hamburg BLs. We have no exhaustive list of these beamlines, and the frame headers do not have this information, so the default chosen by [[generate_XDS.INP]] may be wrong and need manual correction.
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