The second level trigger of the ATLAS experiment at CERN´s LHC

Author

Anjos, A. Dos ; Abolins, M. ; Armstrong, S. ; Baines, J.T. ; Barisonzi, M. ; Beck, H.P. ; Bee, C.P. ; Beretta, M. ; Biglietti, M. ; Blair, R. ; Bogaerts, A. ; Boisvert, V. ; Bosman, M. ; Boterenbrood, H. ; Botterill, D. ; Brandt, S. ; Caron, B. ; Casado,

Author_Institution

Signal Process. Lab., Cidade Univ., Rio de Janeiro, Brazil

Volume

51

Issue

3

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

909

Lastpage

914

Abstract

The ATLAS trigger reduces the rate of interesting events to be recorded for off-line analysis in three successive levels from 40 MHz to ∼100 kHz, ∼2 kHz and ∼200 Hz. The high level triggers and data acquisition system are designed to profit from commodity computing and networking components to achieve the required performance. In this paper, we discuss data flow aspects of the design of the second level trigger (LVL2) and present results of performance measurements.

Keywords

data acquisition; data flow analysis; high energy physics instrumentation computing; muon detection; nuclear electronics; object-oriented methods; particle calorimetry; position sensitive particle detectors; ATLAS experiment; CERN; LHC; LVL2 trigger; second level trigger; Computer networks; Data acquisition; Detectors; Energy measurement; High performance computing; Large Hadron Collider; Magnetic field measurement; Mesons; Particle measurements; Physics; ATLAS; cluster; data acquisition; high-energy physics; network; object oriented; performance; testbed; trigger;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2004.829977

Filename

1311990