6.0

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ConvertToDetectorFaceMD v1

../_images/ConvertToDetectorFaceMD-v1_dlg.png

ConvertToDetectorFaceMD dialog.

Summary

Convert a MatrixWorkspace containing to a MD workspace for viewing the detector face.

Properties

Name Direction Type Default Description
InputWorkspace Input MatrixWorkspace Mandatory An input MatrixWorkspace.
BankNumbers Input int list   A list of the bank numbers to convert. If empty, will use all banksMust have at least one entry.
SplitInto Input int list 2 A comma separated list of into how many sub-grid elements each dimension should split; or just one to split into the same number for all dimensions. Default 2.
SplitThreshold Input number 200 How many events in a box before it should be split. Default 200.
MaxRecursionDepth Input number 20 How many levels of box splitting recursion are allowed. The smallest box will have each side length \(l = (extents) / (SplitInto^{MaxRecursionDepth}).\) Default 20.
OutputWorkspace Output MDEventWorkspace Mandatory Name of the output MDEventWorkspace.

Description

This algorithm takes a a MatrixWorkspace and converts it into a MDEventWorkspace that can be viewed in the SliceViewer.

The algorithm currently only works for instruments with rectangular detectors. The coordinates of the output workspace are:

  • Pixel X coordinate (integer starting at 0)
  • Pixel Y coordinate (integer starting at 0)
  • The center of the bin of the spectrum in that pixel (e.g. time-of-flight)

Each MDEvent created has a weight given by the number of counts in that bin. Zero bins are not converted to events (saving memory).

Once created, the MDEventWorkspace can be viewed in the SliceViewer. It can also be rebinned with different parameters using BinMD v1. This allows you to view the data in detector-space. For example, you might use this feature to look at your detector’s sensitivity as a function of position, as well as a function of TOF. You can also do line plots of the data. See this screenshot for example:

SliceViewer-DetectorFace.png

SliceViewer-DetectorFace.png

BankNumbers Parameter

If your instrument has several rectangular detectors, you can use the BankNumbers property to specify which one(s) to convert. The algorithm looks for rectangular detectors with the name ‘bankXX’ where XX is the bank number.

If you specify more than one bank number, then the algorithm will create a 4D MDEventWorkspace. The fourth dimension will be equal to the bank number, allowing you to easily pick a bank to view.

Categories: AlgorithmIndex | MDAlgorithms\Creation

Source

C++ header: ConvertToDetectorFaceMD.h (last modified: 2020-06-22)

C++ source: ConvertToDetectorFaceMD.cpp (last modified: 2020-04-07)