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DirectILLSelfShielding v1

../_images/DirectILLSelfShielding-v1_dlg.png

DirectILLSelfShielding dialog.

Summary

Calculates self-shielding correction for the direct geometry TOF spectrometers at ILL.

Properties

Name Direction Type Default Description
InputWorkspace Input MatrixWorkspace   A workspace for which to simulate the self shielding.
OutputWorkspace Output MatrixWorkspace Mandatory A workspace containing the self shielding correction factors.
Cleanup Input string Cleanup ON What to do with intermediate workspaces. Allowed values: [‘Cleanup ON’, ‘Cleanup OFF’]
SubalgorithmLogging Input string Logging OFF Enable or disable subalgorithms to print in the logs. Allowed values: [‘Logging OFF’, ‘Logging ON’]
SimulationInstrument Input string Sparse Instrument Select if the simulation should be performed on full or approximated instrument. Allowed values: [‘Sparse Instrument’, ‘Full Instrument’]
SparseInstrumentRows Input number 5 Number of detector rows in sparse simulation instrument.
SparseInstrumentColumns Input number 20 Number of detector columns in sparse simulation instrument.
NumberOfSimulatedWavelengths Input number Optional Number of wavelength points where the simulation is performed (no longer used).
EventsPerPoint Input number 300 The number of neutron events to simulate per wavelength point.

Description

This algorithm calculates self shielding correction factors for the input workspace. It is part of ILL’s direct geometry reduction suite. InputWorkspace should have a sample defined using SetSample. Beam profile can be optionally set using SetBeam. The algorithm uses MonteCarloAbsorption as its backend.

To speed up the simulation, the sparse instrument option of MonteCarloAbsorption is used by default. The number of detectors to simulate can be given by SparseInstrumentRows and SparseInstrumentColumns.

The correction factors are calculated for each bin.

The correction factor contained within the OutputWorkspace can be further fed to DirectILLApplySelfShielding.

Usage

For usage of this algorithm, check the examples here.

Categories: AlgorithmIndex | ILL\Direct | Inelastic\Reduction | Workflow\Inelastic

Source

Python: DirectILLSelfShielding.py (last modified: 2020-03-27)