CERN Accélérateur de science

CMS Note
Report number	CMS-CR-2009-123
Title	The CMS L1 Trigger Emulation Software
Author(s)	Ghete, V M (Vienna, OAW)
Collaboration	on behalf of the CMS Collaboration
Submitted to	17th International Conference on Computing in High Energy and Nuclear Physics, Prague, Czech Republic, 21 - 27 Mar 2009
Submitted by	14 May 2009
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; CMS
Free keywords	TRIGGER
Abstract	The CMS L1 Trigger processes the muon and calorimeter detector data using a complex system of custom hardware processors. A bit-level emulation of the trigger data processing has been developed. This is used to validate and monitor the trigger hardware, to simulate the trigger response in monte-carlo data, and for some components, to seed higher-level triggers. The multiple-use cases are managed using a modular design, implemented within the modular CMS offline software framework. The requirements, design and performance of the emulators are described, as well as the iterative process required to bring the emulators and hardware into agreement.
Copyright/License	Preprint: (License: CC-BY-4.0)