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TOFSANSResolution v1¶
Summary¶
Calculate the Q resolution for TOF SANS data.
See Also¶
Properties¶
Name |
Direction |
Type |
Default |
Description |
|---|---|---|---|---|
InputWorkspace |
InOut |
Mandatory |
Name the workspace to calculate the resolution for |
|
ReducedWorkspace |
Input |
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