2025.1

Gudrun 2025.1

Summary of changes:

• Udpate startup file for SLS.

Legacy Packages

Gudrun - Reduction of neutron and x-ray diffraction data

Overview​​​​
Gudrun is the principal software package for reducing total scattering data taken on the Disordered Materials instruments. It comes with predefined settings for SANDALS, NIMROD, GEM and POLARIS at ISIS and D4c at the ILL. The package contains both neutron (GudrunN) and x-ray (GudrunX) variants, the latter being suitable for reduction of data taken on the group's laboratory x-ray diffractometers, as well as synchrotron data.

GudrunN allows the removal of instrument and sample backgrounds, performs sample attenuation and multiple scattering corrections, and places the data on an absolute scale (typically by normalising to a standard such as vanadium). It also allows systematic reduction of inelasticity effects arising from the presence of light elements such as hydrogen.

GudrunX allows removal of instrument and sample backgrounds, and performs co​rrections for polarisation, attenuation, multiple scattering, sample fluorescence, and Compton scattering, and normalises to tabulated atomic form factors.

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2024.1

Gudrun 2024.1

Summary of changes:

• CI: Add support for Apple Silicon.

2023.2

Gudrun 2023.2

Summary of changes:

• New: Add SLS calibration files from October 2023.
• CI: Regress MinGW64 version to 8.1 (for HDF5 build)
• CI: Don't try to package libgfortran-X.dll any more as it doesn't seem to exist.

2023.1

Gudrun 2023.1

Summary of changes:

• CI: Move to GitHub Actions.
• CI: Bump OSX gfortran version to 11.
• Fix: Loop limit in GetSect.
• Fix: Ensure preprocessing is enabled.

2022.4

Gudrun release 2022.4.

This is a patch release adding missing NIMROD calibration files.

2022.3

Gudrun release 2022.3.

This is a critical patch release focussing on GudrunX, for which the tophatsub code was an incorrect version and produced spurious results.

2022.2

Gudrun release 2022.2. This is a minor update to Gudrun, which provides a preprocessor directive for writing group calibration files to the current directory, rather than to the StartupFilesi.

2022.1

Gudrun release 2022.1. This is a minor update to Gudrun, removing unnecessary files in the StartupFiles directory, i.e. *.grp.cal, *.dat.cal.

2021.1

Gudrun release 2021.1. This is the initial release of the Gudrun code (as of 15th July 2021) with binary packages built on Azure.