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EQSANSResolution v1

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Summary

Calculate the Q resolution for EQSANS data.

See Also

ReactorSANSResolution

Properties

Name	Direction	Type	Default	Description
InputWorkspace	InOut	MatrixWorkspace	Mandatory	Name the workspace to calculate the resolution for
ReducedWorkspace	Input	MatrixWorkspace	Mandatory	I(Q) workspace
OutputBinning	Input	dbl list	Mandatory
MinWavelength	Input	number	Optional	Minimum wavelength to use.
MaxWavelength	Input	number	Optional	Maximum wavelength to use.
PixelSizeX	Input	number	5.15	Pixel size in the X direction (mm).
PixelSizeY	Input	number	5.15	Pixel size in the Y direction (mm).
SampleApertureRadius	Input	number	5	Sample aperture radius (mm).
SourceApertureRadius	Input	number	10	Source aperture radius (mm).
DeltaT	Input	number	250	TOF spread (microsec).

Description

This algorithm extends the TOFSANSResolution to implement the experimentally determined TOF resolution for EQSANS.

The Q resolution for a TOF SANS has two components: a geometrical contribution and a contributions from the resolution in TOF.

The TOF resolution for EQSANS was measured to be:

\(\Delta T = y_0 + A ( f/(1+\exp((\lambda-x^0_1)/k_1)) + (1-f)/(1+\exp((\lambda-x^0_2)/k_2)) )\)

where \(\lambda\) is the wavelength and

\(y_0 = -388\)

\(A = 3838\)

\(f = 0.04398\)

\(x^0_1 = 3.392\)

\(x^0_2 = 134.3\)

\(k_1 = -0.5587\)

\(k_2 = -65.46\)

This algorithm is generally not called directly. It’s called by EQSANSAzimuthalAverage1D after the calculation of I(Q). It can only be applied to an I(Q) workspace.

Categories: AlgorithmIndex | SANS

Source

C++ header: EQSANSResolution.h

C++ source: EQSANSResolution.cpp