Evaluation of neutron dose rates at the HBS prototype target station

At Forschungszentrum Jülich, the High Brilliance Neutron Source (HBS) project aims to provide a efficient source for various scattering, analytical and imaging applications in science and industry under the concept of High-Current Accelerator-driven Neutron Sources (HiCANS). To ensure the radiation safety, the shielding design of the source is of great importance. In this work, neutron dose rates were evaluated at the JULIC neutron test platform, which was designed to test key components of the HBS. In the vicinity of the target station the measured neutron dose rates were below 5 mSv/h for proton currents up to 0.11μA. Monte Carlo simulation using PHITS confirmed these results, with the calculated dose rates generally agreeing with the experimental data. It demonstrates the effectiveness of the multilayered shielding of the target station design for HBS.