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TOFSANSResolution v1

TOFSANSResolution dialog.

Summary

Calculate the Q resolution for TOF SANS data.

See Also

TOFSANSResolutionByPixel

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

Compute the Q resolution for a given I(Q) for a TOF SANS instrument. The Q resolution is given as:

\(\left( \frac{dQ}{Q}\right)^2 = \left( \frac{d\theta}{\theta} \right)^2 + \left( \frac{dt}{t} \right)^2 + \left( \frac{\Delta\lambda}{\lambda} \right)^2\)

where \(t\) is the time of flight, \(\Delta\lambda\) is the wavelength bin width used when histogramming the data, and

\(\left( \frac{d\theta}{\theta}\right)^2 = \frac{1}{12\theta^2}\left[ \frac{3 \ R_1^2}{L_1^2} + \frac{3 \ R^2_2 D^2}{L_1^2 L^2_2} + \frac{2 \ (p_x^2 + p_y^2)}{L^2_2} \right]\)

Categories: AlgorithmIndex | SANS

Source

C++ header: TOFSANSResolution.h

C++ source: TOFSANSResolution.cpp