CERN Accelerating science

ATLAS Note
Report number	ATL-DAQ-PROC-2012-052
Title	ATLAS Level-1 Calorimeter Trigger Upgrade for Phase-I
Author(s)	Qian, W (Rutherford)
Corporate Author(s)	The ATLAS collaboration
Publication	2012
Imprint	25 Oct 2012
Number of pages	8
In:	Topical Workshop on Electronics for Particle Physics, Oxford, UK, 17 - 21 Sep 2012
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	Trigger algorithm, High-speed digital design, PCB simulation, ATCA
Abstract	The ATLAS Level-1 Trigger requires several upgrades to maintain physics sensitivity as the LHC luminosity is raised. One of the most challenging is the electron trigger, with a major development planned for installation in 2018. New on-detector electronics will be installed to digitize electromagnetic calorimetry signals, providing trigger access to shower profile information. The trigger processing will be ATCA-based, with each multi-FPGA module processing  1 Tbit/s of calorimeter digits within the current 2.5 microseconds Level-1 Trigger latency limit. This paper will address the system architecture and design, and give the status of a current technology demonstrator.
Copyright/License	Preprint: (License: CC-BY-4.0)