CERN Accelerating science

ATLAS Slides
Report number	ATL-DAQ-SLIDE-2010-306
Title	Performance of ATLAS L1 Calorimeter Trigger with data
Author(s)	Bracinik, J (University of Birmingham)
Corporate author(s)	The ATLAS collaboration
Submitted to	Topical Workshop on Electronics for Particle Physics 2010, Aachen, Germany, 20 - 24 Sep 2010
Submitted by	[email protected] on 19 Sep 2010
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Abstract	The ATLAS first-level calorimeter trigger is a hardware-based system designed to identify high-pT jets, electron/photon and tau candidates and to measure total and missing ET in the ATLAS calorimeters. After more than two years of commissioning in situ with calibration data and cosmic rays, the system has now been extensively used to select the most interesting proton-proton collision events. Final tuning of timing and energy calibration has been carried out in 2010 to improve the trigger response to physics objects. An analysis of the performance of the level-1 calorimeter trigger will be presented, along with the techniques used to achieve these results.