Analysis of GEM data for disordered materials is done in multiple stages.
During the experiment Open Genie can be used to quickly read in the raw data files from which quick calculations of i(Q) and T(r) can be made. The data is not fully corrected, but this method can be used to spot problems with your sample early in the experiment.
Once the experiment is complete Gudrun is used to fully correct and reduce your data to give the total scattering information from each bank.
Open Genie can then be used to read in the total scattering data. By calculating and subtracting the self scattering from the data, and carefully merging each bank, a carefully corrected i(Q) is produced which spans the full range in Q which GEM is capable of measuring. From this data, correlation functions can be calculated and analysed.
The links below and to the right will allow users to navigate through the instructions for completing each of these stages. However, if you run into difficulties with your data consult your instrument scientist for guidance on how to proceed.
Using Open Genie during an experiment
Setting up a Gudrun file
Reading the total and self scattering data into Open Genie
Producing the distinct scattering data, i(Q)
Producing and analysing correlation functions
For more information on how to install Gudrun and Open Genie, please refer to the GEM software pages.