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This page provides links to commonly used analysis programmes. A similar page is also available on the ILL website.
Temps de vol/ backscattering
LAMP : developed by the ILL under IDL. Reading of data from all ILL instruments and many ISIS, SINQ etc. instruments, or reading of data in ASCII or HDF formats. Data reduction and fitting by models commonly used in quasi-elastic neutron scattering (QENS). Possibility of including new models (IDL licence required – interaction with the person in charge of programme maintenance).
DAVE : developped by NIST under IDL.
QENSH : QENSH (Quasi-Elastic Neutron Scattering with High-performance – download here) is an advanced programme for analysing inelastic and quasi-elastic neutron scattering data. It not only allows the reduction and visualisation of data from the SHARPER spectrometer (LLB’s ‘CRG A’ instrument at ILL), but also supports several time-of-flight spectrometers. With QENSH, users can analyse diffraction spectra, inelastic intensities (such as densities of vibrational states) and quasi-elastic intensities as a function of the scattering vectors under study. An integrated numerical fitting module enables the quasi-elastic scattering data to be fine-tuned. The programme is compatible with data generated by the MANTID software, which can be imported into QENSH to take advantage of its visualisation and numerical fitting modules, providing a complete interface for data analysis.
MANTID : developed in python for many instruments. Reduction, graphical representation and adjustments. See here for ILL instruments.
Small Angle Neutron Scattering: open sources fitting programs
The two most popular open source data modelling programs are Sasview and SASFit. Some models are implemented in only one of the two programs.
Neutron reflectivity fitting programs
There are a significant number of neutron/X-ray reflectivity data fitting programs, generally based on the Abeles transfer matrix method (Parratt recursive method) listed on the following page.
We can notably cite GenX and MotoFit.
Grazing Incidence Small Angle Scattering (GISAS)
In a grazing incidence small-angle scattering measurement in grazing incident light, the Born approximation is no longer valid. The BornAgain program allows to describe the scattering process using the distorted-wave Born approximation.
