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CombineDiffCal v1¶
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Summary¶
Combine a per-pixel calibration with a grouped spectrum calibration
Properties¶
Name |
Direction |
Type |
Default |
Description |
|---|---|---|---|---|
PixelCalibration |
Input |
Mandatory |
OffsetsWorkspace generated from cross-correlation. This is the source of DIFCpixel. |
|
GroupedCalibration |
Input |
Mandatory |
DiffCal table generated from calibrating grouped spectra. This is the source of DIFCgroup. |
|
CalibrationWorkspace |
Input |
Mandatory |
Workspace where conversion from d-spacing to time-of-flight for each spectrum is determined from. This is the source of DIFCarb. |
|
OutputWorkspace |
Output |
DiffCal table generated from calibrating grouped spectra |
||
MaskWorkspace |
Input |
MaskWorkspace |
MaskedWorkspace for PixelCalibration |
Description¶
This algorithm combines pixel calibration results (\(prev\) subscript below) from the PixelCalibration workspace with the calibration of focussed data from PDCalibration (\(pd\) subscript below).
The \(arb\) subscript below denotes values found in the CalibrationWorkspace.
Note
The GroupedCalibration table is assumed to not have \(DIFA\) or \(TZERO\) set.
It is also assumed to have calibration values for all detector pixels.
The effective calibration values are calculated using the following equations
where \(DIFC_{pd}\) is from PDCalibration, \(DIFC_{arb}\) is found in the parameter CalibrationWorkspace that was the input workspace to PDCalibration, and \(DIFC_{prev}\) is from the previous calibration.
The value of \(TZERO\) is unchanged
The value of \(DIFA\) is updated by
If pixels are masked in MaskWorkspace, missing from PixelCalibration, or missing from the list of contributing pixels in CalibrationWorkspace, then the calibration constants found in GroupedCalibration will be copied.
Categories: AlgorithmIndex | Diffraction\Utility
Source¶
C++ header: CombineDiffCal.h
C++ source: CombineDiffCal.cpp