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Table of Contents
Name | Direction | Type | Default | Description |
---|---|---|---|---|
Filename | Input | string | Mandatory | File path of the Data file to load. Allowed extensions: [‘.nxs’] |
OutputWorkspace | Output | MatrixWorkspace | Mandatory | The name to use for the output workspace |
ConvertToTOF | Input | boolean | False | Convert the bin edges to time-of-flight |
Loads an ILL TOF NeXus file into a Workspace2D with the given name.
To date this algorithm only supports: IN4, IN5, IN6, PANTHER, and SHARP.
By default, this algorithm loads the data indexed by channels. To convert to time-of-flight, use the ConvertToTOF option.
This algorithm also supports diffraction mode. In this case, the unit of the output workspace will be wavelength instead of time-of-flight or channel. The support for the omega scan measurement mode for IN5, PANTHER, and SHARP is not handled by this loader, but instead the data is loaded with LoadILLDiffraction.
Note
The initial time-of-flight axis is set up using the ‘time_of_flight’ field in the NeXus file. Therefore the conversion from ‘TOF’ to ‘DeltaE’ may not give the correct zero-energy transfer.
For IN4 and IN6 the algorithm also calculates the pulse interval.
For the number of pulses:
The pulse interval, \(T_{pulse}\) in seconds, is then given by,
\(T_{pulse} = \frac{60 \textrm{s}}{2 v_{fc}} n_{pulses}\).
Note
To run these usage examples please first download the usage data, and add these to your path. In Mantid this is done using Manage User Directories.
Example - Load a regular histogram NeXus file:
# Regular data file.
dataRegular = 'ILL/IN5/104007.nxs'
# Load ILL dataset
ws = Load(dataRegular)
numDimensions = ws.getNumDims()
numHistograms = ws.getNumberHistograms()
print('This workspace has {0} dimensions and {1} histograms.'.format(numDimensions, numHistograms))
Output:
This workspace has 2 dimensions and 98305 histograms.
Categories: AlgorithmIndex | DataHandling\Nexus | ILL\Direct
C++ header: LoadILLTOF2.h (last modified: 2021-03-31)
C++ source: LoadILLTOF2.cpp (last modified: 2021-04-12)