Simulation-based analysis of vacuum performance in the Iranian Light Source Facility with activated NEG coating

• Saeed Talebi Motlagh (School of Particles and Accelerators - IPM)

This study examines the vacuum performance of ultra-low-emittance storage rings utilizing activated non-evaporable getter coatings, with a particular focus on the Iranian Light Source Facility. By employing Monte Carlo simulations using MolFlow+ and SynRad+, the research assesses pressure distributions, photon-stimulated desorption, and conditioning behaviors under various coating and activation scenarios. The simulations integrate photon-stimulated desorption data from both vacuum fired, activated NEG coatings and not vacuum fired, activated NEG coatings, applying this data to chambers that are either fully coated or partially uncoated. Key findings reveal that vacuum performance and conditioning efficiency are significantly enhanced when using the photon-stimulated desorption data from vacuum fired, activated NEG coatings. Moreover, the simulation results show a reasonable correlation with real-world data from the MAX IV synchrotron, thereby validating the reliability of the model.