Speaker
Description
A new high-resolution neutron transmission station is being developed at the GELINA time-of-flight facility of the European Commission’s Joint Research Centre in Geel. The station is installed at flight path 3, employing an extended geometry with the sample positioned at approximately 200 m and the detection system at 400 m from the neutron producing target. This geometry enables significantly improved energy resolution for fast neutron measurements and is extending the capabilities of GELINA in the MeV energy region.
The setup is currently in the commissioning phase and features a flexible detection system based on an organic liquid scintillator with pulse-shape discrimination capabilities for efficient neutron-gamma separation. First test measurements have been performed using carbon samples to benchmark the total cross section and to evaluate the performance and stability of the system. In parallel, dedicated measurements are being carried out to investigate background components, including contributions from scattered neutrons and room-return effect, which are particularly relevant at extended flight paths.
The initial results demonstrate the potential of the new station for ultra-high-resolution transmission measurement and provide a solid basis for future total cross section studies. Once the commissioning phase is completed, systematic measurements of structural materials and light elements, of particular importance for both fission and fusion applications, can be carried out, contributing to the improvement and validation of current nuclear data evaluations.