Author/Authors :
Akindinov، نويسنده , , A. and Alici، نويسنده , , A. and Antonioli، نويسنده , , P. and Arcelli، نويسنده , , S. and Baek، نويسنده , , Y.W. and Basile، نويسنده , , M. and Cara Romeo، نويسنده , , G. and Cavazza، نويسنده , , D. and Cifarelli، نويسنده , , L. and Cindolo، نويسنده , , F. and De Caro، نويسنده , , A. and De Gruttola، نويسنده , , D. and De Pasquale، نويسنده , , S. and Donati، نويسنده , , S. and Furini، نويسنده , , M. and Fusc، نويسنده ,
Abstract :
The goal of the ALICE Time-of-Flight detector, based on MRPC technology, is to perform the charged-particle identification at midrapidity, in the region |η|<0.9. This large area (∼150 m2), finely segmented detector (∼157,000 channels), provides fast signals which will contribute to the Level 0 and Level 1 trigger decisions. We use the TOF detector information to perform an online estimate of the total track multiplicity and to identify simple and peculiar topologies, like those produced by minimum bias p–p, Ultra Peripheral ion–ion collisions and cosmic muons. The system architecture foresees a first layer of 72 VME boards interfacing the detector front-end to a second layer, which receives and processes all the information and takes trigger decisions.
Keywords :
trigger , TOF , MRPC , FPGA , heavy ion
