CERN Accelerating science

ATLAS Note
Report number	ATL-DAQ-PUB-2008-001 ; ATL-COM-DAQ-2008-002
Title	The ATLAS Level-1 Calorimeter Trigger
Author(s)	Achenbach, R ; Adragna, P ; Andrei, V ; Apostologlou, P ; Åsman, B ; Ay, C ; Barnett, B M ; Bauss, B ; Bendel, M ; Bohm, C ; Booth, J R A ; Brawn, I P ; Bright-Thomas, P ; Charlton, D G ; Collins, N J ; Curtis, C J ; Dahlhoff, A ; Davis, A O ; Eckweiler, S ; Edwards, J P ; Eisenhandler, E F ; Faulkner, P J W ; Fleckner, J ; Föhlisch, F ; Garvey, J ; Gee, C N P ; Gillman, A R ; Hanke, P ; Hatley, R P ; Hellman, S ; Hidvegi, A ; Hillier, S J ; Jakobs, K ; Johansen, M ; Kluge, E -E ; Landon, M ; Lendermann, V ; Lilley, J N ; Mahboubi, K ; Mahout, G ; Mass, A ; Meier, K ; Moa, T ; Moyse, E ; Müller, F ; Neusiedl, A ; Nöding, C ; Oltmann, B ; Pentney, J M ; Perera, V J O ; Pfeiffer, U ; Prieur, D P F ; Qian, W ; Rees, D L ; Rieke, S ; Rühr, F ; Sankey, D P C ; Schäfer, U ; Schmitt, K ; Schultz-Coulon, H -C ; Schumacher, C ; Silverstein, S ; Staley, R J ; Stamen, R ; Stockton, M C ; Tapprogge, S ; Thomas, J P ; Trefzger, T ; Watkins, P M ; Watson, A ; Weber, P ; Woehrling, E -E
Publication	2008
Imprint	15 Jan 2008
Number of pages	39
In:	JINST 3 (2008) P03001
DOI	10.1088/1748-0221/3/03/P03001
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	ATLAS ; LHC ; CERN ; Trigger ; First-level ; Level-1 ; Calorimeter
Abstract	The ATLAS Level-1 Calorimeter Trigger uses reduced-granularity information from all the ATLAS calorimeters to search for high transverse-energy electrons, photons, tau leptons and jets, as well as high missing and total transverse energy. The calorimeter trigger electronics has a fixed latency of about 1 microsecond, using programmable custom-built digital electronics. This paper describes the Calorimeter Trigger hardware, as installed in the ATLAS electronics cavern.
Copyright/License	Publication: (License: CC-BY-3.0)

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