CalFile¶

Summary¶

The CalFile is a calibration file originally created for use in the Ariel powder diffraction data reduction package.

Files using this format with the .cal extension are still used by several algorithms in Mantid.

File Format¶

The file is a simple text file with the following format

#  number  UDET  offset  select  group
   0        611  0.0000000  1    0
   1        612  0.0000000  1    0
   2        601  0.0000000  0    0
            ...
  19     101001 -0.0497075  1    2
  20     101002 -0.3515893  1    2
  21     101003 -0.2803879  0    2
            ...
 349     201001  0.0525040  1    3
 350     201002  0.0538936  1    3
 351     201003  0.0535027  1    3
            ...

• number: ignored
• UDET: detector ID
• offset: calibration offset used in AlignDetectors. Comes from the OffsetsWorkspace, or 0.0 if none is given.
• select: 1 if selected (use the pixel). Comes from the MaskWorkspace, or 1 if none is given.
• group: what group to focus to in DiffractionFocussing. Comes from the GroupingWorkspace, or 1 if none is given. Setting the group as 0 specifies the detector as not to be grouped, effectively masking it.

See here for information on CalFile in the greater context of time-of-flight powder diffraction calibration.

Related algorithms¶

In addition to algorithms mentioned in powder diffraction calibration there are some algorithms specifically for CalFiles.