Title :
A flexible demonstrator system for the ATLAS level-1 calorimeter trigger
Author :
Brawn, I. ; Carney, R. ; Conners, A. ; Edwards, J. ; Eisenhandlez, E. ; Garvey, J. ; Cee, C.N.P. ; Gillman, A.R. ; Hanke, P. ; Hatley, R. ; Hillier, S. ; Kluge, E.E. ; Landon, M. ; Leake, J. ; Lewis, G. ; Mass, A. ; Meier, K. ; Pentney, J.M. ; Perera, V.J
Author_Institution :
Sch. of Phys. & Space Res., Birmingham Univ., UK
Abstract :
The proposed level-1 calorimeter trigger system for ATLAS relies upon several key technologies which we have been testing in a demonstrator programme. We describe here the final phase of this programme, which concentrates on crucial aspects of high-speed data transmission inherent in the trigger architecture while operating with signals from prototype ATLAS calorimeters. The 36-channel trigger demonstrator system has been designed to provide a flexible infrastructure for the study of alternative techniques of communication between the calorimeters and the trigger processor, including both analogue links and high-speed digital optical and electrical links operating at up to 1.6 Gbaud. Data fan-out at 160 Mbit/s between trigger processor modules using serialising Application Specific Integrated Circuits (ASICs) driving transmission-line backplanes is also evaluated. A programmable timing system re-synchronises all channels before pipeline processing by ASICs executing an electromagnetic cluster-finding algorithm. Some preliminary results are presented from the operation of this demonstrator system installed in the ATLAS test-beam at CERN
Keywords :
application specific integrated circuits; calorimeters; data communication; data communication equipment; detector circuits; digital communication; high energy physics instrumentation computing; nuclear electronics; optical communication equipment; pipeline processing; trigger circuits; 160 Mbit/s; 36-channel trigger demonstrator system; ASICs; ATLAS level-1 calorimeter trigger; CERN; analogue links; electromagnetic cluster-finding algorithm; flexible demonstrator system; high-speed data transmission; high-speed digital electrical link; high-speed digital optical links; pipeline processing; serialising application specific integrated circuits; transmission-line backplanes; trigger processor; Application specific integrated circuits; Backplanes; Data communication; High speed optical techniques; Optical design; Optical design techniques; Prototypes; System testing; Timing; Transmission lines;
Conference_Titel :
Nuclear Science Symposium, 1996. Conference Record., 1996 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-3534-1
DOI :
10.1109/NSSMIC.1996.590966
