The following email has been sent to KRIEGER, Peter:

===

Dear Peter Krieger,

The submission of your abstract has been successfully processed.

Abstract submitted: https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts.

Status of your abstract: https://indico.cern.ch/event/192695/call- for-abstracts/267/.

See below a detailed summary of your submitted abstract:

Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics

Submitted by: KRIEGER, Peter

Submitted on: 25 February 2014 15:14

Title: Performance of the ATLAS liquid argon calorimeter after three years of LHC operation

Abstract content The ATLAS Liquid Argon (LAr) calorimeter is a unique device employing novel detector technologies and geometries to provide precision barrel and endcap electromagnetic calorimetry in the pseudorapidity region |η|<3.2, endcap hadronic calorimetry in the range 1.5<|η|<3.2, and forward calorimetry in the region 3.1<|η|<4.9. The electromagnetic calorimeters use lead as passive material and are characterized by an accordion geometry that allows a fast and uniform response without azimuthal gaps. Copper and tungsten were chosen as passive material for the hadronic calorimetry; while a classic parallel-plate geometry was adopted at large polar angles, an innovative design based on cylindrical electrodes with thin liquid argon gaps is employed for the coverage at low angles, where the particle flux is higher. All detectors are housed in three cryostats maintained at about 88.5K. The approximately 200,000 cells are read out via front-end boards housed in on-detector crates that also contain calibration, trigger and timing boards.

The talk will focus on the design and performance of the detector during the first three years of LHC operation, during which approximately 27 fb$^{-1}$ of pp collision data were collected at centre-of-mass energies of 7-8 TeV. Throughout this period, the calorimeter consistently operated with performances very close to specifications, with a data-taking efficiency greater than 99% in 2012. The high efficiency is in part due to sophisticated data monitoring infrastructure designed to quickly identify issues that would degrade the detector performance, to ensure that only the best quality data are used for physics analysis.

Summary

Primary Authors: Prof. KRIEGER, Peter (University of Toronto, Dept. of Physics) krieger@physics.utoronto.ca

Co-authors:

Abstract presenters: Prof. KRIEGER, Peter

Track classification: Sensors: 1a) Calorimetry

Presentation type: Oral

Comments: I am submitting this abstract on behalf of the ATLAS Liquid Argon Calorimeter group, in my role as the Chair of our speakers committee. I have identified myself as the presenter above, since this was required for submission of the abstract. The actual speaker will be identified only after the talk has been accepted. Please let me know if this poses any problems.