Title of article
The CDF level 2 calorimetric trigger upgrade
Author/Authors
Bhatti، نويسنده , , A. and Canepa، نويسنده , , A. and Casarsa، نويسنده , , M. and Convery، نويسنده , , M. and Cortiana، نويسنده , , G. and Dell’Orso، نويسنده , , M. and Donati، نويسنده , , S. and Flanagan، نويسنده , , G. and Frisch، نويسنده , , H. and Fukun، نويسنده , , T. and Krop، نويسنده , , D. and Giannetti، نويسنده , , P. and Greco، نويسنده , , V. and Jones، نويسنده , , M. and Liu، نويسنده , , T. and Lucchesi، نويسنده , , D. and Pagan-Griso، نويسنده , , S. and Pantano، نويسنده , , D. and Pianori، نويسنده , , E. and Piendibene، نويسنده , , M. and Pilcher، نويسنده , , C. and Ristori، نويسنده , , L. and Rogondino، نويسنده , , L. and Rusu، نويسنده , , V. and Sartori، نويسنده , , L. and Schmidt، نويسنده , , M. and Veszpremi، نويسنده , , V. and Vidal، نويسنده , , M. and Zhou، نويسنده , , L.، نويسنده ,
Pages
3
From page
331
To page
333
Abstract
CDF II upgraded the calorimeter trigger to cope with the higher detector occupancy due to the increased Tevatron instantaneous luminosity ( ∼ 2.8 × 10 32 cm - 2 s - 1 ) . While the original system was implemented in custom hardware and provided to the L2 trigger a limited-quality jet clustering performed using a reduced resolution measurement of the transverse energy in the calorimeter trigger towers, the upgraded system provides offline-quality jet reconstruction of the full resolution calorimeter data. This allows to keep better under control the dependence of the trigger rates on the instantaneous luminosity and to improve the efficiency and purity of the trigger selections. The upgraded calorimeter trigger uses the general purpose VME board Pulsar, developed at CDF II and already widely used to upgrade the L2 tracking and L2 decision systems. A battery of Pulsars is used to merge and send the calorimeter data to the L2 CPUs, where software-implemented algorithms perform offline-like clustering. In this paper we review the design and the performance of the upgraded system.
Keywords
CDF , L2Cal , trigger
Journal title
Astroparticle Physics
Record number
2025922
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