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TOFSANSResolution dialog.
Table of Contents
| 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). |
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