The level-1 muon trigger of ATLAS, in the barrel region, makes use of a dedicated detector RPC, Resistive Plate Chamber. The processing procedure is accomplished through a Low Pt and a High Pt trigger. To reduce the rate of accidental triggers, due to the background noise in the cavern, for both Low Pt and High Pt , the algorithm is performed in the η and φ projections. The Low Pt trigger uses ...
