CERN Accelerating science

ATLAS Slides
Report number	ATL-DAQ-SLIDE-2012-514
Title	Instrumentation of a Level-1 Track Trigger at ATLAS with Double Buffer Front-End Architecture
Author(s)	Cooper, B
Corporate author(s)	The ATLAS collaboration
Submitted to	Topical Workshop on Electronics for Particle Physics, Oxford, UK, 17 - 21 Sep 2012
Submitted by	bdc@hep.ucl.ac.uk on 12 Sep 2012
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Abstract	The increased collision rate and pile-up produced at the HLLHC requires a substantial upgrade of the ATLAS level-1 trigger in order to maintain a broad physics reach. We show that tracking information can be used to control trigger rates, and describe a proposal for how this information can be extracted within a two-stage level-1 trigger design that has become the baseline for the HLLHC upgrade. We demonstrate that, in terms of the communication between the external processing and the tracking detector frontends, a hardware solution is possible that fits within the latency constraints of level-1.