Reflectometry Changes¶

Table of Contents

ISIS Reflectometry Interface ¶

New table to specify settings on a per-angle basis

The following new options have been added to the Settings tab:
- A new table has been added to the Experiment settings which allows default options to be specified on a per-angle basis. If a row in the Runs tab contains an angle, it will be looked up in this table and those options will be used if a matching angle is found (the angle does not have to be exact as it will match to within 100th of a degree). If you want to specify values that will be used by default for all runs, then simply leave the angle empty.
- Two new drop-down boxes have been added to the Experiment settings, ‘ReductionType’ and ‘SummationType’, which are passed to the corresponding parameters of ReflectometryReductionOneAuto v2.
- A ‘CorrectDetectors’ check box has been added to the Instrument settings, which maps to the corresponding property in ReflectometryReductionOneAuto v2.
The ‘Get Defaults’ button now looks for values for the following additional properties in the IDF:
- AnalysisMode
- PolarizationAnalysis
- TransRunStartOverlap
- TransRunEndOverlap
- IntegratedMonitors
- DetectorCorrectionType
- CorrectDetectors
- SummationType
- ReductionType

Output workspace names and plotting:
- Output workspace names now use + to indicate preprocessed (i.e. summed) workspaces, rather than _, which is used to indicate postprocessed (i.e. stitched) workspaces.
- Output workspace names for time sliced data now contain the time periods, rather than just a slice index number.
- Plotting results in event handling mode now plots the IvsQ_binned_ workspaces rather than IvsQ_, to make the behaviour consistent with non-event mode.
- The Python code generated when you tick Output Notebook has been improved to support special characters (e.g. +) in workspace names.
- The Output Notebook option now works for all groups that are processed as non-event workspaces. Previously, if event handling was enabled but a group contained non-event workspaces, generating the notebook was not performed.
Properties on the Runs tab now take precedence over properties on the Settings tab.
Extra tooltips have been added along with a new ? button which links to the documentation page.
The runs tab table now contains grid lines to make it easier to see where to enter text.
Menu items and toolbar buttons are now enabled/disabled when appropriate, e.g. to prevent table modification during processing. Directly editing table rows and settings is also disabled during processing.
The ‘DirectBeam’ box has been from the settings tab because this is not used.

Fixed some bugs where transmission runs entered on the Settings tab were not being found, whether entered as a run number to load or as the name of an existing workspace in the ADS.
The Python code generated when you tick Output Notebook has been changed so that all algorithm property values are enclosed in quotes. Unquoted values were causing failures in some algorithms. A bug has also been fixed in setting the legend location for the 4th (stitched) plot, which is shown when post-processing is performed.
If any of the mandatory parameters listed below are missing when pressing ‘Get Default’ a warning is shown rather than a crash.
- MonitorIntegralMax
- MonitorIntegralMin
- MonitorBackgroundMin,
- MonitorBackgroundMax,
- LambdaMin,
- LambdaMax,
- I0MonitorIndex
- TransRunStartOverlap and TransRunEndOverlap if on SURF or CRISP.
Fixed a bug where the processed state of rows was being reset when transferring additional rows into the table.

The REFL Reduction, REFL SF Calculator and REFM Reduction graphical interface have been removed, they were not in active use, and were a source of bugs as well as using testing effort that is better directed elsewhere.

The new algorithm PolarizationEfficiencyCor v1 corrects for efficiencies in polarization analysis.
The new algorithm LoadILLPolarizationFactors v1 can load the polarization efficiency files used on D17 at ILL.
The new algorithm MRInspectData v1 takes in raw event data and determines reduction parameters.
The new algorithm MRFilterCrossSections v1 loads a MR (SNS) data file into a workspace group comprising of a workspace for each cross-section.

Improvements to LoadILLReflectometry v1:
- Figaro NeXus files are now properly handled.
- A new property, BeamCentre allows user to manually specify the beam position on the detector.
- The BeamPosition property was renamed to DirectBeamPosition to better reflect its usage.
- The BraggAngle property of LoadILLReflectometry v1 now works as expected: the detector will be rotated such that the reflected peak on the detector will be at twice BraggAngle.
- Slits S2 and S3 have been added to D17 and Figaro IDFs; the loader will adjust their positions according to the NeXus files.
- The MagnetismReflectometryReduction now computes a Q-resolution estimate based on slit openings.
Removed the RegionOfDirectBeam property from ReflectometryReductionOne v2 and ReflectometryReductionOneAuto v2 because this is not used.