Abstract

The ATLAS collaboration at CERN operated a combined test beam (CTB) from May until November 2004. The prototype of ATLAS data acquisition system (DAQ) was used to integrate other subsystems into a common CTB setup. Data were collected synchronously from all the ATLAS detectors, which represented nine different detector technologies. Electronics and software of the first level trigger were used to trigger the setup. Event selection algorithms of the high level trigger were integrated with the system and were tested with real detector data. A possibility to operate a remote event filter farm synchronized with ATLAS TDAQ was also tested. Event data, as well as detectors conditions data were made available for offline analysis

Highlights

  • THE ATLAS experiment at the Large Hadron Collider at CERN is expected to start taking data in 2007

  • We present the combined test beam and discuss the integration of various components of the ATLAS detector, Trigger, and data acquisition system (DAQ) that was accomplished during the CTB

  • Up to 60 DAQ controllers were used to provide Run Control commands to all the software of the CTB setup

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Summary

INTRODUCTION

THE ATLAS experiment at the Large Hadron Collider at CERN is expected to start taking data in 2007. The experiment is described in another article in these proceedings [1]. We first introduce the experiment’s Trigger and Data Acquisition system (TDAQ). We present the combined test beam and discuss the integration of various components of the ATLAS detector, Trigger, and DAQ that was accomplished during the CTB

THE ATLAS TRIGGER AND DAQ
COMBINED TEST BEAM OF ATLAS IN 2004
INTEGRATION OF SUBSYSTEMS WITH THE ATLAS DAQ
Integration of Detectors With the DAQ
Integration of the First Level Trigger With the DAQ
Integration of the High Level Trigger With the DAQ
Online Monitoring of Event Data
Connection to Offline Data Analysis
OPERATION OF DAQ IN THE COMBINED TEST BEAM
RESULTS
OTHER BENEFITS OF THE CTB FOR FURTHER DEVELOPMENT
VIII. CONCLUSION
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