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VesuvioL1ThetaResolution v1

VesuvioL1ThetaResolution dialog.

Summary

Calculates resolution of l1 and theta

Properties

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.

Description

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.

Usage

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

Source

C++ header: VesuvioL1ThetaResolution.h

C++ source: VesuvioL1ThetaResolution.cpp