LoadIsawSpectrum v1

../_images/LoadIsawSpectrum-v1_dlg.png

LoadIsawSpectrum dialog.

Summary

Load incident spectrum and detector efficiency correction file.

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=",ow.readX(0)
print "y=",ow.readY(0)

Output:

x= [ 399.2  400.8  402.4  404.   405.6  407.2  408.8]
y= [-0.00471167 -0.00471167 -0.00471187 -0.00471187 -0.00471187 -0.00433439]

Categories: Algorithms | Crystal\DataHandling | DataHandling\Text