Speaker
Description
The study of the origin of Ultra-High-Energy Cosmic Rays (UHECRs) involves understanding how they interact and escape the sources. The escape is determined by the magnetic fields and the acceleration at the source, whereas the composition is affected by interactions which also lead to very high energy photons and neutrinos. CRPropa is well suited for studying these scenarios with the addition of dedicated modules. Two additional modules are discussed in this contribution: the recently developed Hadronic Interaction Module (HIM) which equips CRPropa with an additional means of handling hadronic interactions; and the Photohadronic Module (PHM) which implements an improved photomeson model previously published. The physical implications of these new additions are shown in the context of CRPropa simulations relevant to UHECR sources.
