Wall effects on neutron storage lifetime simulation in Geant4 for the nEDM experiment

The nEDM experiment at the Spallation Neutron Source utilizes UltraCold Neutrons (UCNs) to measure a permanent electric dipole moment of the neutron. For the nEDM experiment, the UCN storage lifetime is directly affected by the loss of UCNs to the walls of the measurement cell. Using Geant4, we are able to build a simulation that allows us to see how these UCNs behave in our cell by utilizing microroughness surface functions for non-specular reflections. This talk will cover the ongoing simulation work in Geant4 as well as comparing it to other programs such as penTRACK or starUCN.