Table of Contents
This custom interface integrates several tasks related to engineeering diffraction. It provides calibration and focusing functionality which can be expected to expand for next releases as it is under active development. The following sections describe the different tabs or functionality areas of the interface.
This tab provides a graphical interface to calculate calibrations and visualize them.
It is possible to load an existing calibration (as a CSV file) and to generate a new calibration file (which becomes the new current calibration).
These parameters are required to generate new calibrations:
Here it is possible to focus run files, provided a run number or run file. The focusing process uses the algorithm EnggFocus. In the documentation of the algorithm you can find the details on how the input runs are focused.
The interface will also create workspaces that can be inspected in the workspaces window:
Three focusing alternatives are provided:
Depending on the alternative chosen, the focusing operation will include different banks and/or combinations of spectra (detectors). In the firs option, normal focusing, all the selected banks and all the spectra present in the input runs are considered. In the second alternative, cropped focusing, all the banks are considered in principle but only a list of spectra provided manually are processed. In the third option, texture focusing, the banks are defined by a user-defined list of banks and corresponding spectrum IDs provided in a file. For these alternatives, the output focused workspace will take different suffixes: _bank_1, _bank_2, and so on for normal focusing, _cropped for cropped focusing, and _texture_bank_1, _texture_bank_2, and so on for texture focusing (using the bank IDs given in the detector grouping file).
For texture focusing, the detector grouping file is a text (csv) file with one line per bank. Each line must contain at least two numeric fields, where the first one specifies the bank ID, and the second and subsequent ones different spectrum numbers or ranges of spectrum numbers. For example:
# Bank ID, spectrum numbers
1, 205-210
2, 100, 102, 107
3, 300, 310, 320-329, 350-370
Controls several settings, including the input folders where the instrument run files can be found. Other advanced options can also be controlled to customize the way the underlying calculations are performed.
The calibration settings are organized in three blocks:
The input directories will be used when looking for run files (Vanadium and Ceria). They effectivel ybecome part of the search path of Mantid when using this interface.
The pixel calibration file contains the calibration of every pixel of all banks, as produced by the algorithm EnggCalibrateFull.
The Following advanced settings are available to customize the behavior of this interface:
Most of the functionality provided by this interface is based on the engineering diffraction Mantid algorithms (which are named with the prefix Engg). This includes EnggCalibrate, EnggCalibrateFull, EnggVanadiumCorrections, EnggFocus, and several other algorithms, explained in detail in the Mantid algorithms documentation.
Categories: Interfaces | Diffraction