SµS Beamlines High Intensity Proton Accelerator Complex. Please click to enlarge highresolution view. Introduction µE1 µE4 piM3 piE3 piE1 Sidebar LMU and Groups Laboratory for Muon Spin Spectroscopy (LMU) Low-Energy Muons Group Bulk-µSR Group User Contacts User Office Provides all information about user research at PSI Large Research Facilities DUO Login Call for Proposals Next Deadline: December 06, 2021. PSI User Facilities Newsletter Current News from PSI photon, neutron and muon user facilities NUM Homepage PSI Division Research with Neutrons and Muons. MuonSources.org MuonSources.org provides information about muon facilities and muon research worldwide. ISMS The International Society for µSR Spectroscopy (ISMS).