6.4

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SANSILLIntegration v1

../_images/SANSILLIntegration-v1_dlg.png

SANSILLIntegration dialog.

Summary

Performs SANS integration and resolution calculation based on corrected data.

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.