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VesuvioL1ThetaResolution v1

../_images/VesuvioL1ThetaResolution-v1_dlg.png

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