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LoadIsawSpectrum v1

Summary

Load incident spectrum and detector efficiency correction file.

See Also

SaveIsawPeaks, SaveIsawUB

Properties

Name	Direction	Type	Default	Description
SpectraFile	Input	string	Mandatory	Incident spectrum and detector efficiency correction file. Allowed extensions: [‘.dat’]
OutputWorkspace	Output	MatrixWorkspace	Mandatory	An output Workspace containing spectra for each detector bank.
InputWorkspace	Input	MatrixWorkspace		Optional: An input workspace with the instrument we want to use.
InstrumentName	Input	string		Optional: Name of the instrument to base the GroupingWorkspace on which to base the GroupingWorkspace.
InstrumentFilename	Input	string		Optional: Path to the instrument definition file on which to base the GroupingWorkspace. Allowed extensions: [‘.xml’]

Description

Load incident spectrum and detector efficiency correction file containing spectra for each detector. The spectra are created by “TOPAZ_spectrum.py” from files of vanadium or TiZr and background.

Usage

#Write a ISAW Spectrum file
import mantid
filename=mantid.config.getString("defaultsave.directory")+"loadIsawSpectrumTest.dat"
f=open(filename,'w')
f.write("# Column  Unit    Quantity\n")
f.write("# ------  ------  --------\n")
f.write("#      1  us      time-of-flight\n")
f.write("#      2  counts  counts per us corrected for vanadium rod absorption\n")
f.write("#      3  A       wavelength\n")
f.write("#      4  counts  counts per us uncorrected for absorption\n")
f.write("#      5          transmission\n")
f.write("#\n")
f.write("Bank 1     DetNum 17\n")
f.write("      400.000      -23.878       0.0856      -22.409       0.9385\n")
f.write("      401.600      -23.878       0.0859      -22.409       0.9385\n")
f.write("      403.200      -23.879       0.0863      -22.409       0.9385\n")
f.write("      404.800      -23.879       0.0866      -22.409       0.9385\n")
f.write("      406.400      -23.879       0.0870      -22.409       0.9384\n")
f.write("      408.000      -21.966       0.0873      -20.614       0.9384\n")
f.close()


ow = LoadIsawSpectrum(SpectraFile=filename,InstrumentName="TOPAZ")

    #check the results
print("x= {}".format(ow.readX(0)))
print("y= {}".format(ow.readY(0)))

Output:

x= [399.2 400.8 402.4 404.  405.6 407.2 408.8]
y= [-0.0047017  -0.0047017  -0.00470189 -0.00470189 -0.00470189 -0.00432521]

Categories: AlgorithmIndex | Crystal\DataHandling | DataHandling\Text

Source

C++ header: LoadIsawSpectrum.h

C++ source: LoadIsawSpectrum.cpp