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ReflectometryReductionOneLiveData v1

Summary

Run the reflectometry reduction algorithm on live data

See Also

ReflectometryISISLoadAndProcess, StartLiveData

Properties

Name	Direction	Type	Default	Description
InputWorkspace	Input	MatrixWorkspace	Mandatory
Instrument	Input	string	CRISP	Instrument to find live value for. Allowed values: [‘CRISP’, ‘INTER’, ‘OFFSPEC’, ‘POLREF’, ‘SURF’]
GetLiveValueAlgorithm	Input	string	GetLiveInstrumentValue	The algorithm to use to get live values from the instrument
FirstTransmissionRunList	Input	str list		A list of run numbers or workspace names for the first transmission run. Multiple runs will be summed before reduction.
SecondTransmissionRunList	Input	str list		A list of run numbers or workspace names for the second transmission run. Multiple runs will be summed before reduction.
SliceWorkspace	Input	boolean	False	If true, slice the input workspace
NumberOfSlices	Input	number	Optional	The number of uniform-length slices to slice the input workspace into
SummationType	Input	string	SumInLambda	The type of summation to perform. Allowed values: [‘SumInLambda’, ‘SumInQ’]
ReductionType	Input	string	Normal	The type of reduction to perform when summing in Q. Allowed values: [‘Normal’, ‘DivergentBeam’, ‘NonFlatSample’]
IncludePartialBins	Input	boolean	False	If true then partial bins at the beginning and end of the output range are included
AnalysisMode	Input	string	PointDetectorAnalysis	Analysis mode. This property is only used when ProcessingInstructions is not set. Allowed values: [‘PointDetectorAnalysis’, ‘MultiDetectorAnalysis’]
ProcessingInstructions	Input	string		Grouping pattern of spectrum numbers to yield only the detectors of interest. See GroupDetectors for syntax.
CorrectDetectors	Input	boolean	True	Moves detectors to twoTheta if ThetaIn or ThetaLogName is given
DetectorCorrectionType	Input	string	VerticalShift	When correcting detector positions, this determines whether detectorsshould be shifted vertically or rotated around the sample position. Allowed values: [‘RotateAroundSample’, ‘VerticalShift’]
WavelengthMin	Input	number	Optional	Wavelength Min in angstroms
WavelengthMax	Input	number	Optional	Wavelength Max in angstroms
I0MonitorIndex	Input	number	Optional	I0 monitor workspace index
MonitorBackgroundWavelengthMin	Input	number	Optional	Wavelength minimum for monitor background subtraction in angstroms.
MonitorBackgroundWavelengthMax	Input	number	Optional	Wavelength maximum for monitor background subtraction in angstroms.
MonitorIntegrationWavelengthMin	Input	number	Optional	Wavelength minimum for integration in angstroms.
MonitorIntegrationWavelengthMax	Input	number	Optional	Wavelength maximum for integration in angstroms.
NormalizeByIntegratedMonitors	Input	boolean	True	Normalize by dividing by the integrated monitors.
SubtractBackground	Input	boolean	False	If true then perform background subtraction
BackgroundProcessingInstructions	Input	string		These processing instructions will be passed to the background subtraction algorithm
BackgroundCalculationMethod	Input	string	PerDetectorAverage	The type of background reduction to perform. Allowed values: [‘PerDetectorAverage’, ‘Polynomial’, ‘AveragePixelFit’]
DegreeOfPolynomial	Input	number	0	Degree of the fitted polynomial.
CostFunction	Input	string	Least squares	The cost function to be passed to the Fit algorithm. Allowed values: [‘Least squares’, ‘Unweighted least squares’]
Params	Input	dbl list		A comma separated list of first bin boundary, width, last bin boundary. These parameters are used for stitching together transmission runs. Values are in wavelength (angstroms). This input is only needed if a SecondTransmission run is provided.
StartOverlap	Input	number	Optional	Start wavelength for stitching transmission runs together. Only used if a second transmission run is provided.
EndOverlap	Input	number	Optional	End wavelength (angstroms) for stitching transmission runs together. Only used if a second transmission run is provided.
ScaleRHSWorkspace	Input	boolean	True	Scale the right-hand-side or left-hand-side workspace. Only used if a second transmission run is provided.
TransmissionProcessingInstructions	Input	string		These processing instructions will be passed to the transmission workspace algorithm
CorrectionAlgorithm	Input	string	AutoDetect	The type of correction to perform. Allowed values: [‘None’, ‘AutoDetect’, ‘PolynomialCorrection’, ‘ExponentialCorrection’]
Polynomial	Input	dbl list		Coefficients to be passed to the PolynomialCorrection algorithm.
C0	Input	number	0	C0 value to be passed to the ExponentialCorrection algorithm.
C1	Input	number	0	C1 value to be passed to the ExponentialCorrection algorithm.
MomentumTransferMin	Input	number	Optional	Minimum Q value in IvsQ Workspace. Used for Rebinning the IvsQ Workspace
MomentumTransferStep	Input	number	Optional	Resolution value in IvsQ Workspace. Used for Rebinning the IvsQ Workspace. This value will be made minus to apply logarithmic rebinning. If you wish to have linear bin-widths then please provide a negative value.
MomentumTransferMax	Input	number	Optional	Maximum Q value in IvsQ Workspace. Used for Rebinning the IvsQ Workspace
ScaleFactor	Input	number	Optional	Factor you wish to scale Q workspace by.
PolarizationAnalysis	Input	boolean	False	Apply polarization corrections
FloodCorrection	Input	string	Workspace	The way to apply flood correction: Workspace - use FloodWorkspace property to get the flood workspace, ParameterFile - use parameters in the parameter file to construct and apply flood correction workspace. Allowed values: [‘Workspace’, ‘ParameterFile’, ‘None’]
FloodWorkspace	Input	string		A flood workspace or filename to apply. If empty and FloodCorrection is ‘Workspace’ then no correction is applied.
Debug	Input	boolean	False	Whether to enable the output of extra workspaces.
TimeInterval	Input	dbl list		Array for lengths of time intervals for splitters: if the array is empty, then there will be one splitter created from StartTime and StopTime; if the array has one value, then if this value is positive, all splitters will have same time intervals, else the time intervals will be exponentially increasing; if the size of the array is larger than one, then the splitters can have various time interval values.
LogValueInterval	Input	number	Optional	Delta of log value to be sliced into from min log value and max log value; if not given, then only value
LogName	Input	string		Name of the sample log to use to filter - for example, the pulse charge is recorded in ‘ProtonCharge’.
UseNewFilterAlgorithm	Input	boolean	True	If true, use the new FilterEvents algorithm instead of FilterByTime.
ReloadInvalidWorkspaces	Input	boolean	True	If true, reload input workspaces if they are of the incorrect type
GroupTOFWorkspaces	Input	boolean	True	If true, group the TOF workspaces
CalibrationFile	Input	string		Calibration data file containing a list of detector IDs and twoTheta offsets (in degrees).These should be provided as two spaced-delimited columns, labelled detectorid and theta_offset. Allowed values: [‘dat’]
OutputWorkspace	Output	MatrixWorkspace		Output workspace in Q (native binning)
PolarizationEfficiencies	Input	string		A workspace or file name containing the polarization efficiency factors for either the Wildes or Fredrikze correction methods.
ROIDetectorIDs	Input	string		When detector IDs are provided, the algorithm will attempt to sum counts across each row of a RectangularDetector after the flood correction step. Detectors not included in the given range will be masked before summing. This will only work correctly when the instrument definition file(IDF) contains a single RectangularDetector panel.

ReflectometryReductionOneAutoLiveData

This algorithm performs a reduction with ReflectometryReductionOneAuto v3 on a live data workspace. It is intended to be run as a post-processing algorithm for StartLiveData v1, although it can also be called directly on a workspace output from live data monitoring. It is not intended to be run on a workspace for a completed run.

This algorithm does some setting up of the instrument and sample logs, which are not normally present for a live data workspace, so that the reduction can be run. This uses live values for theta and the slit gaps, which are found from the instrument using GetLiveInstrumentValue v1. Once the workspace is set up, ReflectometryReductionOneAuto v3 is run, with ThetaLogName set to the appropriate value to use the value of theta that was set in the logs.

GetLiveInstrumentValue v1 requires Mantid to have EPICS support installed, and appropriate processes must be running on the instrument to supply the EPICS values. A different algorithm for fetching live values could be specified by overriding the GetLiveValueAlgorithm property.

Usage

StartLiveData(Instrument=’INTER’,

PostProcessingAlgorithm=’ReflectometryReductionOneLiveData’, PostProcessingProperties=’Instrument=INTER’, AccumulationMethod=’Replace’,AccumulationWorkspace=’TOF_live’,OutputWorkspace=’IvsQ_binned_live’,)

See also

Algorithm GetLiveInstrumentValue v1, ReflectometryReductionOneAuto v3, StartLiveData v1 and the ISIS Reflectometry interface.

Categories: AlgorithmIndex | Reflectometry

Source

Python: ReflectometryReductionOneLiveData.py