Reflectometry Changes¶

New¶

• Added algorithm CreateFloodWorkspace v1 which makes a workspace for subsequent flood corrections.
• Added algorithm ApplyFloodWorkspace v1 which applies flood corrections to a workspace.
• FindReflectometryLines has been rewritten and updated to version 2. The new version finds a single line by a Gaussian fit. Version 1 has been deprecated and will be removed in a future release.
• Added algorithm ReflectometrySliceEventWorkspace v1 which slices an input event workspace into multiple slices, producing a histogram workspace suitable for use with ReflectometryReductionOneAuto v3.
• SaveReflectometryAscii v1 is a general algorithm which saves the first spectrum of a workspace in Ascii format particularly suited for reflectometry data.
• Some computations from ReflectometryMomentumTransfer v1 were extracted to a new algorithm, ReflectometryBeamStatistics v1.
• GroupToXResolution v1 can be used to group the reflectivity data (as point data) to the resolution.
• Added algorithm ReflectometryBackgroundSubtraction v1 which calculates the background of a given workspace and removes it.
• Added algorithm ReflectometryISISLoadAndProcess v1 which performs full preparation and processing for a single run or combined set of runs in an ISIS reflectometry reduction.

Improvements¶

• The ILL reduction workflow algorithms were reorganized to allow correct reflectivity calculation in the SumInLambda case.
• Added flood corrections to ReflectometryReductionOneAuto. The correction data can be provided either via a flood workspace passed as a property or taken from the parameter file.
• The four Ascii save algorithms SaveANSTOAscii, SaveILLCosmosAscii, SaveReflCustomAscii, and SaveReflThreeColumnAscii now correctly save x-error and can treat correctly point data and histograms. They are, however, deprecated in favour of SaveReflectometryAscii v1. Please see SaveReflectometryAscii v1 for more documentation.
• ReflectometryReductionOneAuto v3 now supports the Wildes method for polarization corrections as well as Fredrikze when configured in the parameters file.
• ReflectometryReductionOneAuto v3 now crops the unbinned output workspace in Q to MomentumTransferMin and MomentumTransferMax, if specified
• ReflectometryReductionOne v2, ReflectometryReductionOneAuto v3, CreateTransmissionWorkspace v2, and CreateTransmissionWorkspaceAuto v2 now use spectrum numbers for their processing instructions instead of workspace indices.
• ReflectometryReductionOne v2 and ReflectometryReductionOneAuto v3 now take a parameter to pass processing instructions to the transmission workspace algorithms and no longer accept strict spectrum checking.
• Common naming of slit component name and size properties across algorithms.
• SpecularReflectionPositionCorrect v2 is now compatible with the reflectometers at ILL.
• CreateTransmissionWorkspace v2 and CreateTransmissionWorkspaceAuto v2 now use NormalizeByIntegratedMontitors instead of using MonitorIntegrationWavelengthMin and MonitorIntegrationWavelengthMax being defined, to determine how to normalize.
• ILL reflectometry algorithms name changes: LinePosition replaces BeamCentre, DirectLineWorkspace replaces DirectBeamWorkspace, and TwoTheta is the preferred input property which replaces BraggAngle.
• ReflectometryILLPreprocess v1 does not accept and will not output an OutputBeamPositionWorkspace. The peak position and two theta scattering anlge are now present in the SampleLog information as documented.
• ILL’s D17 and Figaro instrument definition files are modified to let the detector ID’s begin with index 0 instead of 1.
• LoadILLReflectometry v1 lets spectrum numbers start with 0 instead of 1.

Bug fixes¶

• Fixed the error propagation in grouping in ReflectometryILLConvertToQ.
• Handling of group workspaces containing single workspaces when scaling by period and using ScaleFactorFromPeriod, i.e. UseManualScaleFactors is true, ManualScaleFactors remains empty.
• A bug has been fixed on the Settings tab where the IncludePartialBins check box had been hidden by a misplaced text entry box.
• ReflectometryReductionOneAuto v3 No longer sums all of a transmission run’s workspaces and instead will use the first run only
• In ReflectometryReductionOneAuto v3 an issue where if you gave only one of either MomentumTransferMax or MomentumTransferMin were specified it would be ignored, this has been fixed.
• Reverted property names for polarization correction coefficients in ReflectometryReductionOneAuto for backwards compatibility.
• Fixed the BeamCenter property of ReflectometrySumInQ to actually be a fractional workspace index.

New¶

• Flood correction options have been added to the interface.

Improvements¶

• The interface now supports the Wildes method for polarization corrections as well as Fredrikze when configured in the parameters file.

Bug fixes¶

• The SaveASCII tab from the interface was unable to save in some places on Windows and that has now been fixed.

Release 4.0.0