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SANSSolidAngleCorrection v1

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Summary

Performs solid angle correction on SANS 2D data.

See Also

SolidAngle, SANSBeamFluxCorrection

Properties

Name	Direction	Type	Default	Description
InputWorkspace	Input	MatrixWorkspace	Mandatory
OutputWorkspace	Output	MatrixWorkspace	Mandatory
DetectorTubes	Input	boolean	False	If true, the algorithm will assume that the detectors are tubes in the Y direction.
DetectorWing	Input	boolean	False	If true, the algorithm will assume that the detector is curved around the sample. E.g. BIOSANS Wing detector.
OutputMessage	Output	string
ReductionProperties	Input	string	__sans_reduction_properties

Description

Performs a solid angle correction on all detector pixels. This algorithm is usually called by SANSReduction or HFIRSANSReduction.

The solid angle correction is applied as follows:

\(I'(x,y)=\frac{I(x,y)}{\cos^3(2\theta)}\)

\(\sigma_{I'(x,y)}=\frac{\sigma_{I(x,y)}}{\vert\cos^3(2\theta)\vert}\)

If DetectorTubes is set to True, the correction is calculated according to a tube geometry. The cosine term above then becomes:

\(\cos^3(2\theta) \rightarrow \cos^2(2\theta) \cos(\alpha)\)

where \(\alpha\): is the angle between the sample-to-pixel vector and its projection on the X-Z plane.

Categories: AlgorithmIndex | Workflow\SANS\UsesPropertyManager | CorrectionFunctions\InstrumentCorrections

Source

C++ header: SANSSolidAngleCorrection.h

C++ source: SANSSolidAngleCorrection.cpp