Readiness of the ATLAS liquid argon calorimeter for LHC collisions

The ATLAS collaboration

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

The ATLAS liquid argon calorimeter has been operating continuously since August 2006. At this time, only part of the calorimeter was readout, but since the beginning of 2008, all calorimeter cells have been connected to the ATLAS readout system in preparation for LHC collisions. This paper gives an overview of the liquid argon calorimeter performance measured in situ with random triggers, calibration data, cosmic muons, and LHC beam splash events. Results on the detector operation, timing performance, electronics noise, and gain stability are presented. High energy deposits from radiative cosmic muons and beam splash events allow to check the intrinsic constant term of the energy resolution. The uniformity of the electromagnetic barrel calorimeter response along η (averaged over Φ) is measured at the percent level using minimum ionizing cosmic muons. Finally, studies of electromagnetic showers from radiative muons have been used to cross-check the Monte Carlo simulation. The performance results obtained using the ATLAS readout, data acquisition, and reconstruction software indicate that the liquid argon calorimeter is well-prepared for collisions at the dawn of the LHC era.

Original languageEnglish
Pages (from-to)723-753
Number of pages31
JournalEuropean Physical Journal C
Volume70
Issue number3
DOIs
Publication statusPublished - Dec 1 2010

Fingerprint

Calorimeters
calorimeters
Argon
argon
collisions
muons
Liquids
liquids
readout
electromagnetism
Readout systems
showers
data acquisition
Data acquisition
Electronic equipment
Deposits
actuators
deposits
time measurement
Calibration

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cite this

Readiness of the ATLAS liquid argon calorimeter for LHC collisions. / The ATLAS collaboration.

In: European Physical Journal C, Vol. 70, No. 3, 01.12.2010, p. 723-753.

Research output: Contribution to journalArticle

The ATLAS collaboration. / Readiness of the ATLAS liquid argon calorimeter for LHC collisions. In: European Physical Journal C. 2010 ; Vol. 70, No. 3. pp. 723-753.
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abstract = "The ATLAS liquid argon calorimeter has been operating continuously since August 2006. At this time, only part of the calorimeter was readout, but since the beginning of 2008, all calorimeter cells have been connected to the ATLAS readout system in preparation for LHC collisions. This paper gives an overview of the liquid argon calorimeter performance measured in situ with random triggers, calibration data, cosmic muons, and LHC beam splash events. Results on the detector operation, timing performance, electronics noise, and gain stability are presented. High energy deposits from radiative cosmic muons and beam splash events allow to check the intrinsic constant term of the energy resolution. The uniformity of the electromagnetic barrel calorimeter response along η (averaged over Φ) is measured at the percent level using minimum ionizing cosmic muons. Finally, studies of electromagnetic showers from radiative muons have been used to cross-check the Monte Carlo simulation. The performance results obtained using the ATLAS readout, data acquisition, and reconstruction software indicate that the liquid argon calorimeter is well-prepared for collisions at the dawn of the LHC era.",
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