SC²S Colloquium - April 15, 2015

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Date: April 15, 2015
Room: 02.07.023
Time: 3:30 pm, s.t.
Invited by: Kilian Röhner


Daniel Göhlen: Maximum entropy analysis for inelastic neutron scattering

In this guided research, a Maximum Entropy (MaxEnt) algorithm was applied to inelastic neutron scattering data with the goal of overcoming limitations of the common treatment of this data. Generally, a model is considered from already known physics, theoretic predictions and visual inspection of the data. While this is an efficient way for systems where all contributions to the model are already known and one is just interested in exact numbers, unknown or not expected features might be overlooked or erroneous allocate. As the first implementation of a MaxEnt algorithm showed various problems which have been verified by extensive tests with a broad range of spectral shapes and signal-to-noise ratios, different improvements and optimizations have been developed to address these problems. The initial algorithm, the encountered problems and approaches to solve these will be presented in this talk. Concluding, an analysis of the final results will be discussed.