Development of Neutron Extraction Plugs for HBS

Within the Jülich High Brilliance Neutron Source (HBS) project Forschungszentrum Jülich is developing a novel High Current Accelerator-driven Neutron Source (HiCANS). A special feature of the HBS is the concept of supplying neutrons to each instrument from their own adapted moderator, optimized for the desired neutron spectrum. The Moderator Plugs are an essential part of this concept. A neutron extraction plug may contain a cold moderator to modify the neutron spectrum towards lower energies as well as all necessary supply lines and control lines. In addition, it will either contain a neutron guide to transport a larger beam divergence or the beginning of a collimation setup for a highly collimated beam. An HBS target station demonstrator, which has been developed and build at the JULIC accelerator at Forschungszentrum Jülich, is providing neutrons to several experimental instruments since December 2022. The presentation will describe the development of extraction plugs for this demonstrator and the conclusions drawn for future extraction plugs at a possible HiCANS HBS