A flexible demonstrator system for the ATLAS level-1 calorimeter trigger

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:512993

Brawn, I; Carney, R; Connors, A ^[1]

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1. Univ. of Birmingham (United Kingdom); and others

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 serializing Application Specific Integrated Circuits (ASICs) driving transmission-line backplanes is also evaluated. A programmable timing system re-synchronizes 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.

• OSTI ID: 512993
• Report Number(s): CONF-961123--
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
DATA ACQUISITION SYSTEMS
DATA TRANSMISSION SYSTEMS
PERFORMANCE
SHOWER COUNTERS
TRIGGER CIRCUITS