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“School of Particles”

Paper IPM / Particles / 11396

School of Particles and Accelerator

Title:

Performance of the CMS Level-1 Trigger during Commissioning with Cosmic Ray Muons

Author(s):

1 .	Hessamaddin Arfaei
2 .	Hamed Bakhshian
3 .	Ali Fahim
4 .	Abideh jafari
5 .	Mojtaba Mohammadi Najafabadi
6 .	Ahmad Moshaii
7 .	Saeid Paktinat
8 .	Shahin Rouhani
9 .	Batool Safarzadeh
10 .	Maryam Zeinali

Status:

Published

Journal:

JINST

Year:

2010

Pages:

Supported by:

IPM

Abstract:

The CMS Level-1 trigger was used to select cosmic ray muons and LHC beam events during data-taking runs in 2008, and to estimate the level of detector noise. This paper describes the trigger components used, the algorithms that were executed, and the trigger synchronisation. Using data from extended cosmic ray runs, the muon, electron/photon, and jet triggers have been validated, and their performance evaluated. Efficiencies were found to be high, resolutions were found to be good, and rates as expected.

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