SANSSolidAngleCorrection v1¶

../_images/SANSSolidAngleCorrection-v1_dlg.png

SANSSolidAngleCorrection dialog.

Table of Contents

Summary
Properties
Description
Source

Summary ¶

Performs solid angle correction on SANS 2D data.

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: Algorithms | Workflow\SANS\UsesPropertyManager | CorrectionFunctions\InstrumentCorrections

Source ¶

C++ source: SANSSolidAngleCorrection.cpp (last modified: 2017-02-09)

C++ header: SANSSolidAngleCorrection.h (last modified: 2016-06-07)