Session B • HiBEAM and SAGA: Swedish contributions to development of instruments for ESS

The HIBEAM collaboration aims to harness the unique potential of ESS by developing a dedicated particle physics instrument with world-leading capabilities. The HIBEAM programme includes the first search in 30 years for free neutrons transforming into antineutrons, as well as searches for sterile neutrons, ultralight axion dark matter and a non-zero neutron electric charge

SAGA. The understanding of interfacial properties of materials, as well as interfacial processes in terms of structural, morphological and compositional changes, is of crucial importance in many scientific fields that include chemistry, physics, biology and engineering. A dedicated surface scattering beamline has been identified as having a high priority for the choice to the next phase of instruments at European Spallation Source (ESS) based on the evaluation of capability gaps in the initial instrument suite. A wide consortium, including Lund University, Uppsala University, KTH, Linköping University, Malmö University, LINXS and ESS, which builds on the strength in surface and interface science in Sweden, aim to design and construct such an instrument at ESS. The SAGA project, financed by Swedish Research Council, have develop a conceptual and technical design as well as high lighting the need for technical development together with the sister project HIBEAM. The design of the instrument is directly motivated by the science and business case developed in coordination with the international community to take full advantage of the brilliance of ESS.