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SANSILLIntegration v1

SANSILLIntegration dialog.

Summary

Performs SANS integration and resolution calculation based on corrected data.

See Also

SANSILLReduction

Properties

Name	Direction	Type	Default	Description
InputWorkspace	Input	MatrixWorkspace	Mandatory	The input workspace.
OutputWorkspace	Output	MatrixWorkspace	Mandatory	The output workspace.
OutputType	Input	string	I(Q)	Choose the output type. Allowed values: [‘I(Q)’, ‘I(Qx,Qy)’, ‘I(Phi,Q)’]
CalculateResolution	Input	string	None	Choose to calculate the Q resolution. Allowed values: [‘MildnerCarpenter’, ‘DirectBeam’, ‘None’]
DefaultQBinning	Input	string	PixelSizeBased	Choose how to calculate the default Q binning. Allowed values: [‘PixelSizeBased’, ‘ResolutionBased’]
BinningFactor	Input	number	1	Specify a multiplicative factor for default Q binning (pixel or resolution based).
OutputBinning	Input	dbl list		The manual Q binning of the output
NPixelDivision	Input	number	1	Number of subpixels to split the pixel (NxN)
NumberOfWedges	Input	number	0	Number of wedges to integrate separately.
WedgeWorkspace	Output	WorkspaceGroup		WorkspaceGroup containing I(Q) for each azimuthal wedge.
WedgeAngle	Input	number	30	Wedge opening angle [degrees].
WedgeOffset	Input	number	0	Wedge offset angle from x+ axis.
AsymmetricWedges	Input	boolean	False	Whether to have asymmetric wedges.
MaxQxy	Input	number	-1	Maximum of absolute Qx and Qy.
DeltaQ	Input	number	-1	The dimension of a Qx-Qy cell.
IQxQyLogBinning	Input	boolean	False	I(Qx, Qy) log binning when binning is not specified.
PanelOutputWorkspaces	Output	WorkspaceGroup		The name of the output workspace group for detector panels.
ShapeTable	Input	TableWorkspace		The name of the table workspace containing drawn shapes on which to integrate. If provided, NumberOfWedges, WedgeOffset and WedgeAngle arguments are ignored.
WavelengthRange	Input	dbl list	1,10	Wavelength range [Angstrom] to be used in integration (TOF only).

Description

This algorithms performs integration of corrected SANS data. The input workspace must be processed by SANSILLReduction as Sample. That is, it has to have instrument associated with it, and be in units of Wavelength. The output can be chosen among \(I(Q)\) (default), \(I(Phi,Q)\) or \(I(Qx,Qy)\). Separate outputs can be generated for each of the detector components, if so desired.

The resolution can be calculated either by following [Mildner-Carpenter] approach or using fitted horizontal size of the direct beam, when the property CalculateResolution is set to DirectBeam. The latter is currently supported only for D11, D11lr, and D11B.

OutputBinning

By default, a sensible Q-binning is calculated based on the size (more precisely, the height) of the pixels in the detector. If requested, it can be calculated also such that at each \(Q\) \(dQ\) is about twice the \(Q\) resolution. The latter is calculated following [Mildner-Carpenter] approach.

Binning can also be specified manually:

One entry

If one entry is given, it will denote the bin width and the \(Q_min\) and \(Q_max\) will be calculated from the instrument configuration. The - can be given to request logarithmic binning.

OutputBinning=0.1 # equidistant binning of 0.1 AA, range will be computed automatically
OutputBinning=-0.1 # logarithmic binning of 10%, range will be computed automatically

Two entries

If two entries are given, they will be regarded as user specifed \(Q_min\) and \(Q_max\), and the default bin width will be suggested.

OutputBinning=[0.01,2.5] # default binning within 0.01 AA and 2.5 AA

Three entries

It three entries are given, it will signify the \(Q_min\), bin width and \(Q_max\). Again _ sign in the bin width will denote logarithmic binning.

OutputBinning=[0.01,0.1,2.5] # bins with width of 0.1 within range 0.01-2.5 AA
OutputBinning=[0.01,-0.1,2.5] # 10% logarithmic binning within range 0.01-2.5 AA

Custom binning

If more than three entries are given (odd number of entries), a fully custom array will be constructed as explained in Params property of Rebin.

Usage

Check the example in SANSILLReduction.

References

[Mildner-Carpenter] (1,2)

J. Appl. Cryst. (1984). 17, 249-256

Categories: AlgorithmIndex | ILL\SANS

Source

Python: SANSILLIntegration.py