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Table of Contents
Re#13566 New GetAllEi algorithm analyses chopper logs and signals on monitors to identify all possible incident energies used in Direct inelastic experiments in single or multi-rep mode. Internally the algorithm incorporates four sub-algorithms used by instrument scientists on instruments with different background, chopper system and signal quality so it can reliably run on all these instruments. The algorithm is the basis of changes to autoreduction, which allow instrument scientists and users to reduce (convert to SPE) results of an inelastic experiment without any user intervention.
ISIS inelastic instruments descriptions have been modified to contain chopper location and other additional information necessary to calculate time, when chopper lets neutrons trough from appropriate chopper logs.
Re#14071 RenameWorkspace algorithm renames separate monitor workspace, if a monitor workspace is attached to the current workspace. This allows substantial simplification of the Direct Reduction workflow, where the number of operations are performed on a workspace itself and the monitor workspace, which is associated with the main workspace.
Re#13980 On the basis of changes outlined in Re#13566 and Re#14071, ISIS reduction now has the capability to identify incident energies used in direct inelastic experiments and reduce data according to these energies. AUTO key-word allow data reduction without providing a guess for the incident energy. Reduction finishes as normal if no energies were identified, returning the message stating the run is not probably intended for reduction. This feature allows convenient use of the ISIS autoreduction service to process data from direct inelastic experiment without user or instrument scientist intervention.
Re#14456. A number of bug-fixes and small modifications were performed in order to enable correct background removal for direct inelastic reduction.
NullifyNegativeValues
which toggles
nullification of negative signals after background subtraction.nullify_negative_signal
has been added to ISIS
reduction to toggle removal of negative signal according to
particular requests. The default behaviour for nullifying negative
signals has been defined in instrument definition files according to
user preference.Re#12403 LET IDF has been modified using an embedded IDF correction mechanism which was introduced in Mantid release 3.4. This mechanism allows users to update the Instrument Definition (Files) (IDF) stored within nexus data files. The exclusions based on run numbers, which had to be introduced into ISIS direct inelastic reduction program were removed and this new feature allows Instrument Definition information to be safely embedded into the nexus files (or modified at a later stage).