Strömungsmechanische Simulation und experimentelle Validierung des kryogenen Wasserstoff-Moderators für die Europäische Spallationsneutronenquelle ESS

The European spallation neutron source ESS is currently under construction and should start part-load operation in 2023. With an average proton beam power of 5 MW, it will become the most powerful spallation neutron source worldwide. A key component of a spallation neutron source is the cold moderator. At the ESS, the cold moderator will be operated with liquid parahydrogen at a temperature and pressure around 20 K and 10 bar respectively and is intended to slow down (moderate) the fast neutrons, released by the spallation process, to the required low velocity level