Title :
Commissioning Experience With the ATLAS Level-1 Calorimeter Trigger System
Author :
Achenbach, R. ; Adragna, P. ; Andrei, V. ; Barnett, B.M. ; Bauss, B. ; Bendel, M. ; Bohm, C. ; Booth, J.R.A. ; Brawn, I.P. ; Charlton, D.G. ; Curtis, C.J. ; Davis, A.O. ; Eisenhandler, E. ; Faulkner, P.J.W. ; Föhlisch, F. ; Gee, C.N.P. ; Geweniger, C. ; G
Author_Institution :
Kirchhoff-Inst. fur Phys., Heidelberg Univ., Heidelberg, Germany
Abstract :
The ATLAS Level-1 Calorimeter Trigger is one of the main elements of the first stage of event selection for the ATLAS experiment at the LHC. The input stage consists of a mixed analogue/digital component taking trigger sums from the ATLAS calorimeters. The trigger logic is performed in a digital, pipelined system with several stages of processing, largely based on FPGAs, which perform programmable algorithms in parallel with a fixed latency to process about 300 Gbyte/s of input data. The real-time output consists of counts of different types of physics objects and energy sums. The production of final modules started in 2006, and installation of these modules and the necessary infrastructure at ATLAS has been underway for some time, with the intention of having a full system in situ during 2007, before first collisions at the LHC. The first experiences of commissioning and running the full scale system will be presented, along with results from integration tests performed with the upstream calorimeters, and the downstream trigger and data flow systems.
Keywords :
data analysis; field programmable gate arrays; high energy physics instrumentation computing; nuclear electronics; parallel architectures; particle calorimetry; position sensitive particle detectors; real-time systems; ATLAS level-1 calorimeter trigger system; FPGA; LHC; data flow systems; field programmable gate arrays; parallel architecture; pipelined system; real-time output system; Delay; Field programmable gate arrays; Large Hadron Collider; Logic; Performance evaluation; Physics; Pipeline processing; Production systems; Real time systems; System testing; Parallel architectures; pipeline processing; real time systems; triggering;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2008.915924
