RD27 note 34 ATLAS Note DAQ--NO--30 17 January 1995 THE LEVEL-1 CALORIMETER TRIGGER SYSTEM (2007)
For Atlas Brawn, I. P. Brawn, R. E. Carney, J. Garvey, D. Rees, R. Staley, ...
We describe the design of a digital calorimeter trigger processor system which could form a major part of the ATLAS level-1 trigger system. Utilising novel techniques, but with today's...
The ATLAS Level-1 Trigger: Status of the System and First Results from Cosmic-Ray Data (2007)
Berge, D, Aielli, G, Andrei, V, Achenbach, R, Adragna, P, Aloisio, A, ...
The ATLAS detector at CERN's Large Hadron Collider (LHC) will be exposed to proton-proton collisions from beams crossing at 40 MHz. At the design luminosity of 10^34 cm^-2 s^-1 there are on average...
Production Test Rig for the ATLAS Level-1 Calorimeter Trigger Digital Processors (2007)
Mahout, Gilles, Achenbach, R, Andrei, V, Bauss, B, Barnett, B M, Böhm, C, ...
High Density Backplanes: Problems and Solutions (2006)
Achenbach, R, Andrei, V, Barnett, B M, Bauss, B, Böhm, C, Booth, J R A, ...
The backplane and crate infrastructure for the digital processors of the ATLAS Level-1 Calorimeter Trigger (L1Calo) are presented, The L1Calo system is a compact, high-performance real-time system...
The first-level trigger of ATLAS (2005)
Haller, J, Achenbach, R, Aielli, G, Aloisio, A, Alviggi, M G, Aprodu, V, ...
Due to the huge interaction rates and the tough experimental environment of pp collisions at a centre-of-mass energy sqrt(s)=14 TeV and luminosities of up to 10^34cm^-2s^-1, one of the experimental...
Garvey, J, Achenbach, R, Apostologlou, A, Barnett, B M, Bauss, B, Brawn, I P, ...
At the full LHC design luminosity of 10^34 cm^-2 s^-1 there will be approximately 10^9 proton-proton interactions per second. The ATLAS level-1 trigger is required to have an acceptance factor of...
ATLAS Level-1 Calorimeter Trigger: Subsystem Tests of a Jet/Energy-sum Processor Module (2003)
Garvey, J, Hillier, S J, Mahout, G, Moye, T H, Staley, R J, Watkins, P M, ...
The ATLAS Level-1 Calorimeter Trigger consists of a Preprocessor, a Cluster Processor (CP), and a Jet/Energy-sum Processor (JEP). The CP and JEP receive digitised trigger-tower data from the...
The ATLAS Level-1 Calorimeter Trigger Architecture (2003)
Garvey, J, Hillier, S J, Mahout, G, Moye, T H, Staley, R J, Watkins, P M, ...
The architecture of the ATLAS Level-1 Calorimeter Trigger system (L1Calo) is presented. Common approaches have been adopted for data distribution, result merging, readout, and slow control across the...
A Demonstrator Programme For The Atlas Level-1 Calorimeter Trigger (1995)
I. P. Brawn, R.E. Carney, J. Garvey, D. Rees, R. Staley, P. Watkins, ...
This document describes work to demonstrate the feasibility of the level-1 trigger design presented in the ATLAS Technical Proposal. In the phase-I programme already completed, a prototype custom...