Level 0 trigger decision unit for the LHCb experiment

J. Laubser (1) , Hervé Chanal (1) , R. Cornat (1) , O. Deschamps (1) , M. Magne (1) , Pascal Perret (1)

1 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand

The Level-0 Decision Unit( L0DU)is the central part of the first trigger level of the LHCb detector. The L0DU receives information from the Calorimeter, Muon and Pile-Up sub-triggers, with fixed latencies, at 40 MHz via 24 high speed optical fiber links running at 1.6 Gb/s. The L0DU performs simple physics algorithm to compute the decision in order to reduce the data flow down to 1 MHz for the next trigger level and a L0Block is constructed. The processing is implemented in FPGA using a 40MHz synchronous pipelined architecture. The algorithm can be easily configured with the Experiment Control System (ECS) without FPGA reprogramming. The L0DU is a 16 layer custom board.

Domaines: Instrumentations et Détecteurs [physics.ins-det]

J. Laubser, Hervé Chanal, R. Cornat, O. Deschamps, M. Magne, et al.. Level 0 trigger decision unit for the LHCb experiment. 12th Workshop on Electronics for LHC and Future Experiments, Sep 2006, Valencia, Spain. 297-301 p. ⟨in2p3-00118873⟩