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VesuvioL1ThetaResolution dialog.
Table of Contents
| Name | Direction | Type | Default | Description |
|---|---|---|---|---|
| PARFile | Input | string | PAR file containing calibrated detector positions. Allowed extensions: [‘.par’, ‘.dat’] | |
| SampleWidth | Input | number | 3 | With of sample in cm. |
| SpectrumMin | Input | number | 3 | Index of minimum spectrum |
| SpectrumMax | Input | number | 198 | Index of maximum spectrum |
| NumEvents | Input | number | 1000000 | Number of scattering events |
| Seed | Input | number | 123456789 | Seed for random number generator |
| L1BinWidth | Input | number | 0.05 | Bin width for L1 distribution. |
| ThetaBinWidth | Input | number | 0.05 | Bin width for theta distribution. |
| OutputWorkspace | Output | MatrixWorkspace | Mandatory | Output workspace containing mean and standard deviation of resolution per detector. |
| L1Distribution | Output | MatrixWorkspace | Distribution of lengths of the final flight path. | |
| ThetaDistribution | Output | MatrixWorkspace | Distribution of scattering angles. |
This algorithm calculates the resolution of the scattering angle (theta) and final flight path (L1) for a VESUVIO calibration provided by a PAR file.
The calculation is performed using a Monte Carlo simulation that simulates the path of a neutron between a random point on the face of the sample to a random point on the face of each detector.
Example - VesuvioL1ThetaResolution
resolution, l1_dist, theta_dist = VesuvioL1ThetaResolution(NumEvents=1000)
resolution_spec_names = resolution.getAxis(1).extractValues()
print("Resolution spectra: %s" % (', '.join(resolution_spec_names)))
print("L1 distribution spectra count: %d" % (l1_dist.getNumberHistograms()))
print("Theta distribution spectra count: %d" % (theta_dist.getNumberHistograms()))
Output:
Resolution spectra: l1_Mean, l1_StdDev, theta_Mean, theta_StdDev
L1 distribution spectra count: 196
Theta distribution spectra count: 196
Categories: AlgorithmIndex | CorrectionFunctions\SpecialCorrections
C++ header: VesuvioL1ThetaResolution.h (last modified: 2021-03-31)
C++ source: VesuvioL1ThetaResolution.cpp (last modified: 2021-05-24)