Status of the ATLAS level-1 central trigger and muon barrel trigger and first results from cosmic-ray data

Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • Authors:
  • ATLAS Collaboration


The ATLAS detector at CERN's Large Hadron Collider (LHC) will be exposed to proton-proton collisions from beams crossing at 40 MHz. A three-level trigger system will select potentially interesting events in order to reduce the read-out rate to about 200 Hz. The first trigger level is implemented in custom-built electronics and makes an initial fast selection based on detector data of coarse granularity. It has to reduce the rate by a factor of 10 4 to less than 100 kHz. The other two consecutive trigger levels are in software and run on PC farms. We present an overview of the first-level central trigger and the muon barrel trigger system and report on the current installation status. Moreover, we show analysis results of cosmicray data recorded in situ at the ATLAS experimental site with final or close-to-final hardware. © 2007 IEEE.

Bibliographical metadata

Original languageEnglish
Title of host publication2007 15th IEEE-NPSS Real-Time Conference, RT|IEEE-NPSS Real-Time Conf., RT
Publication statusPublished - 2007
Event2007 15th IEEE-NPSS Real-Time Conference, RT - Batavia, IL
Event duration: 1 Jul 2007 → …


Conference2007 15th IEEE-NPSS Real-Time Conference, RT
CityBatavia, IL
Period1/07/07 → …
Internet address