3.6

CreateTransmissionWorkspaceAuto v1

../_images/CreateTransmissionWorkspaceAuto-v1_dlg.png

CreateTransmissionWorkspaceAuto dialog.

Summary

Creates a transmission run workspace in Wavelength from input TOF workspaces.

Properties

Name Direction Type Default Description
AnalysisMode Input string PointDetectorAnalysis Analysis Mode to Choose. Allowed values: [‘PointDetectorAnalysis’, ‘MultiDetectorAnalysis’]
FirstTransmissionRun Input MatrixWorkspace Mandatory Input workspace.
SecondTransmissionRun Input MatrixWorkspace   Second transmission run workspace in TOF.
OutputWorkspace Output MatrixWorkspace Mandatory Output transmission workspace in wavelength.
Params Input dbl list   A comma separated list of first bin boundary, width, last bin boundary. These parameters are used for stitching together transmission runs. Values are in wavelength (angstroms). This input is only needed if a SecondTransmission run is provided.
StartOverlap Input number Optional Start wavelength for stitching transmission runs together
EndOverlap Input number Optional End wavelength (angstroms) for stitching transmission runs together
I0MonitorIndex Input number Optional I0 monitor index
ProcessingInstructions Input string   Grouping pattern on workspace indexes to yield only the detectors of interest. See GroupDetectors for details.
WavelengthMin Input number Optional Wavelength Min in angstroms
WavelengthMax Input number Optional Wavelength Max in angstroms
WavelengthStep Input number Optional Wavelength step in angstroms
MonitorBackgroundWavelengthMin Input number Optional Monitor wavelength background min in angstroms
MonitorBackgroundWavelengthMax Input number Optional Monitor wavelength background max in angstroms
MonitorIntegrationWavelengthMin Input number Optional Monitor integral min in angstroms
MonitorIntegrationWavelengthMax Input number Optional Monitor integral max in angstroms

Description

Facade over CreateTransmissionWorkspace v1. Pulls numeric parameters out of the instrument parameters where possible. You can override any of these automatically applied defaults by providing your own value for the input.

If ProcessingInstructions is not set its value is inferred from other properties:

  • If AnalysisMode = PointDetectorAnalaysis and PointDetectorStart = PointDetectorStop then the spectrum specified by PointDetectorStart is used.
  • If AnalysisMode = PointDetectorAnalaysis and PointDetectorStart ≠ PointDetectorStop then the spectra specified by PointDetectorStart and PointDetectorStop are used.
  • If AnalysisMode = MultiDetectorAnalaysis then the spectrum specified by MultiDetectorStart and the last spectrum are used.

See CreateTransmissionWorkspace v1 for more information on the wrapped algorithm.

Usage

Note

To run these usage examples please first download the usage data, and add these to your path. In MantidPlot this is done using Manage User Directories.

Example - Create a transmission run

trans = Load(Filename='INTER00013463.nxs')
# Reduction overriding the default values for MonitorBackgroundWavelengthMin and MonitorBackgroundWavelengthMax which would otherwise be retirieved from the workspace
transWS = CreateTransmissionWorkspaceAuto(FirstTransmissionRun=trans)

print "The first four transWS Y values are:"
for i in range (4):
    print "%.4f" % transWS.readY(0)[i]

Output:

The first four transWS Y values are:
0.0223
0.0602
0.1020
0.1207

Example - Create a transmission run, overloading default parameters

trans = Load(Filename='INTER00013463.nxs')
# Reduction overriding the default values for MonitorBackgroundWavelengthMin and MonitorBackgroundWavelengthMax which would otherwise be retirieved from the workspace
transWS = CreateTransmissionWorkspaceAuto(FirstTransmissionRun=trans, MonitorBackgroundWavelengthMin=0.0, MonitorBackgroundWavelengthMax=1.0)

print "The first four transWS Y values are:"
for i in range (4):
    print "%.4f" % transWS.readY(0)[i]

Output:

The first four transWS Y values are:
0.0221
0.0598
0.1013
0.1198

Example - Create a transmission run from two runs

trans1 = Load(Filename='INTER00013463.nxs')
trans2 = Load(Filename='INTER00013464.nxs')
# Reduction overriding the default values for MonitorBackgroundWavelengthMin and MonitorBackgroundWavelengthMax which would otherwise be retirieved from the workspace
transWS = CreateTransmissionWorkspaceAuto(FirstTransmissionRun=trans1, SecondTransmissionRun=trans2, Params=[1.5,0.02,17], StartOverlap=10.0, EndOverlap=12.0)

print "The first four transWS Y values are:"
for i in range (4):
    print "%.4f" % transWS.readY(0)[i]

Output:

The first four transWS Y values are:
0.0567
0.0575
0.0577
0.0580

Categories: Algorithms | Reflectometry\ISIS