Irradiation effect simulations

This report delivers a summary of the work performed within the scope of Task 4 of ARIES WP17. One of the main goals of Task 17.4 was the simulation of radiation-induced atomic displacements and transmutation with Monte Carlo shower tools, providing a relationship between high-energy accelerator environments and irradiation experiments with low-energy proton and ion beams. In this document, we present simulation results for collimators in the HL-LHC betatron cleaning insertion, quantifying atomic displacements and gas production accumulated during the collimator lifetime. We further present simulations for related irradiation experiments at GSI (by ARIES WP17) and BLIP (by RaDIATE collaboration, not within the scope of ARIES). In addition, the effects of displacement damage and H/He production on graphite properties were modelled by means of Molecular Dynamics simulations