Author/Authors :
Carlino، نويسنده , , G. and Conventi، نويسنده , , F. and Bocci، نويسنده , , V. and Di Mattia، نويسنده , , A. and Luminari، نويسنده , , L. and Nisati، نويسنده , , A. and Pastore، نويسنده , , F. and Petrolo، نويسنده , , E. and Vari، نويسنده , , R. and Veneziano، نويسنده , , S.، نويسنده ,
Abstract :
The three-levels ATLAS trigger system has been designed to reduce the initial LHC interactions rate from 1 GHz to ∼ 100 Hz in order to allow permanent data storage. This result must be achieved preserving the less probable physics signals against a large background therefore providing a challenge task for the trigger and DAQ system. The Level-1 muon trigger in the barrel region of the Muon Spectrometer is provided by Resistive Plate Chambers (RPC) working in avalanche mode. More than 1000 RPC Units of different sizes will be installed covering a surface of about 3650 m 2 with a 350,000 readout channels. A detailed simulation of the Level-1 has been developed in order to optimize the trigger logic design and to study his performances. A description of the Level-1 trigger in the barrel and preliminary results of his performances will be presented.
