The ATLAS Level-1 Muon Topological Trigger Information for Run 2 of the LHC

For the next run of the LHC, the ATLAS Level-1 trigger system will include topological information on trigger objects from the calorimeters and muon detectors. In order to supply coarse grained muon topological information, the existing MUCTPI (Muon-to-Central-Trigger-Processor Interface) system has been upgraded. The MIOCT (Muon Octant) module firmware has been then modified to extract, encode and send topological information through the existing MUCTPI electrical trigger outputs. The topological information from the muon detectors will be sent to the Level-1 Topological Trigger Processor (L1Topo) through the MUCTPI-to-Level-1-Topological-Processor (MuCTPiToTopo) interface. Examples of physics searches involving muons are: search for Lepton Flavour Violation, Bs-physics, Beyond the Standard Model (BSM) physics and others. This paper describes the modifications to the MUCTPI and its integration with the full trigger chain.