Georg Brandl,
Petr Cermak
(MLZ),
Tobias Weber
04/04/2017, 11:00
We will use takin to convolute our model with instrument resolution and fit the experimental data.
Georg Brandl,
Petr Cermak,
Tobias Weber
04/04/2017, 09:00
We will use ufit as a library to read, visualize, treat and fit measured data.
Petr Cermak
04/04/2017, 14:20
This lecture will focus on several aspects of the TAS spectroscopy. In the first part we will focus on the ways how to enhance resolution and reduce background of the instrument. We will also show some benchmarking results of the top leading spectrometers.
Prof.
Götz Eckold
(Georg-August University of Göttingen)
03/04/2017, 14:30
An analytical approach for the calculation of the 4D-resolution function of a three-axes spectrometer is presented that takes into account all essential features of state-of-the art instruments. In particular, the performance of focusing techniques in direct and reciprocal space is considered in detail. Complementary to existing numerical simulation methods, the analytical treatment provides...
Dr
Jiri Kulda
(Institut Laue-Langevin)
03/04/2017, 16:00
The software package RESTRAX includes both a high-speed analytical (Gaussian) convolution algorithm and a Monte Carlo ray-tracing code providing enhanced accuracy in description of most of the spectrometer components. The program is built up for a three-axis spectrometer layout, comprising a complete set of usual neutron optical devices. Their representation in the ray-tracing part includes...
Astrid Schneidewind
04/04/2017, 14:00
The proper interpretation of spurious signal (spurions) in the measured TAS data is a key aspect of every experiment. We will go through several possible types of spurions: Bragg peaks from Aluminium or Copper, Harmonic wavelengths in ki and kf, Currat-Axe spurions, Bragg tail contamination. We will show how to visualize and avoid them.
Dr
Jiri Kulda
(Institut Laue-Langevin)
03/04/2017, 13:50
The flexibility of the TAS instrument together with the selective nature of the corresponding experiments (as opposed to a global data collection by the TOF methods) calls for a certain refinement of the experiment strategy prior to the start of the measurements. In particular for the less experienced users, to assess the advantages and disadvatages of diverse optional instrument setups and to...