6.4

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IndirectSampleChanger v1

../_images/IndirectSampleChanger-v1_dlg.png

IndirectSampleChanger dialog.

Table of Contents

Summary

Create elastic window scans for sample changer

Properties

Name Direction Type Default Description
Instrument Input string IRIS The name of the instrument. Allowed values: [‘IRIS’, ‘OSIRIS’]
Analyser Input string Mandatory The analyser bank used during run. Allowed values: [‘graphite’, ‘mica’, ‘fmica’]
Reflection Input string Mandatory Reflection number for instrument setup during run. Allowed values: [‘002’, ‘004’, ‘006’]
FirstRun Input number Mandatory First Sample run-number.
LastRun Input number Mandatory Last Sample run-number.
NumberSamples Input number Mandatory Increment for run-number.
SpectraRange Input long list 0,1 Comma separated range of spectra numbers to use.
ElasticRange Input dbl list Mandatory Energy range for the elastic component.
InelasticRange Input dbl list Mandatory Energy range for the inelastic component.
TotalRange Input dbl list Mandatory Energy range for the total energy component.
SampleEnvironmentLogName Input string Position Name of the sample environment log entry
SampleEnvironmentLogValue Input string last_value Value selection of the sample environment log entry. Allowed values: [‘last_value’, ‘average’]
MSDFit Input boolean False Perform an MSDFit. Do not use with GroupingMethod as “All”
WidthFit Input boolean False Perform a 2 peak width Fit. Do not use with GroupingMethod as “All”
Plot Input boolean False True to plot the output data.
Save Input boolean False True to save the output data.

Description

This algorithm takes a range of input runs that have been obtained using the Sample Changer on Indirect Inelastic Instruments at the ISIS facility. The sample changer has 3 positions. Input run numbers are associated with certain general temperature points. The algorithm uses the position of the sample to determine which specific temperature from the sample logs should be used for an ElasticWindowScan <algm-ElasticWindowScan>. From the ElasticWindowScan, the EISF (elastic incoherent scattering factor) is calculated and there is an option to run MSDFit. This is repeated for the number of different materials in the sample changer.

For example, if there are 2 different materials in the sample changer, at 3 different temperatures 10K, 20K and 300K. The algorithm would execute 2 scans, one for each sample: The first scan would be 1st, 3rd and 5th runs combined. The second scan would be 2nd, 4th, and 6th runs combined.

Categories: AlgorithmIndex | Workflow\MIDAS