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MuscatData-v1.rst

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Description

Calculates Multiple Scattering based on the Monte Carlo program MINUS. It takes a sample S(Q, w) from an input sqw workspace and supports both Flat and Cylindrical geometries. More information on the multiple scattering can be procedure can be found in the modes manual.

References

  1. M W Johnson, AERE Report R7682 (1974)

Usage

Example - a basic example using MuscatData.

def createSampleWorkspace(name, random=False):
    """ Creates a sample workspace with a single lorentzian that looks like IRIS data"""
    import os
    function = "name=Lorentzian,Amplitude=8,PeakCentre=5,FWHM=0.7"
    ws = CreateSampleWorkspace("Histogram", Function="User Defined", UserDefinedFunction=function, XUnit="DeltaE", Random=True, XMin=0, XMax=10, BinWidth=0.01)
    ws = CropWorkspace(ws, StartWorkspaceIndex=0, EndWorkspaceIndex=9)
    ws = ScaleX(ws, -5, "Add")
    ws = ScaleX(ws, 0.1, "Multiply")

    #load instrument and instrument parameters
    LoadInstrument(ws, InstrumentName='IRIS')
    path = os.path.join(config['instrumentDefinition.directory'], 'IRIS_graphite_002_Parameters.xml')
    LoadParameterFile(ws, Filename=path)
    ws = RenameWorkspace(ws, OutputWorkspace=name)
    return ws


ws = createSampleWorkspace("irs26173_graphite002_red", random=True)
sqw = SofQW(ws, QAxisBinning='2,1,10', Emode='Indirect', OutputWorkspace="irs26173_graphite002_sqw")
SaveNexus(ws, "irs26173_graphite002_red.nxs")
SaveNexus(sqw, "irs26173_graphite002_sqw.nxs")

MuscatData(SamNumber='26173', SqwInput='26173', Thick='0.5', Width='0.5', Instrument='irs')