BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Performance of the ATLAS Tile Hadronic Calorimeter at LHC in Run 1 and planned upgrades DTSTART;VALUE=DATE-TIME:20140227T094000Z DTEND;VALUE=DATE-TIME:20140227T101000Z DTSTAMP;VALUE=DATE-TIME:20261014T223812Z UID:indico-contribution-47@indico.inp.nsk.su DESCRIPTION:Speakers: Oleg Solovyanov (Institute for High Energy Physics)\ nThe Tile Calorimeter (TileCal) is the central section of the ATLAS hadron ic calorimeter at the Large Hadron Collider\, a key detector for the measu rements of hadrons\, jets tau leptons and missing transverse energy. Scint illation light produced in the tiles is transmitted by wavelength shifting fibers to photomultiplier tubes (PMTs).\nThe resulting electronic signals from approximately 10000 PMTs are measured and digitized before being tra nsferred to off-detector data-acquisition systems.\nAfter an initial setti ng of the absolute energy scale in test beams with particles of well-defin ed momentum\, the calibrated scale was transferred to the rest of the dete ctor via the response to radioactive sources. The calibrated scale was val idated in situ with muons and single hadrons and the timing performance wi th muons and jets as detailed in this contribution.\nThe data quality proc edures used during the LHC data-taking and the evolution of the detector s tatus are exposed. The energy and the time reconstruction performance of t he digitized signals is presented and the noise behavior and its improveme nt with the detector consolidation in maintenance periods are shown.\nA se t of calibration systems allow the monitoring and the equalization of the calorimeter channels response via signal sources that act at every stage o f the signal path\, from scintillation light to digitized signal.\nThese p artially overlapping systems are described in detail\, their individual pe rformance is exposed as well as comparative results on the response evolut ion of the calorimeter with time during the full LHC data-taking period. T he procedure of setting the absolute energy scale for channels/cells is de scribed and the challenge of preserving it at the % level during 3 years o f LHC collision data is described.\nIts main upgrade will occur for the Hi gh Luminosity LHC phase (phase 2) where the peak luminosity will increase 5-fold compared to the design luminosity (10³⁴ cm⁻²s⁻¹) but with maintained energy (i.e. 7+7 TeV). An additional increase of the average lu minosity with a factor of 2 can be achieved by luminosity leveling. This u pgrade will probably happen around 2022.\nThe TileCal upgrade aims at repl acing the majority of the on- and off-detector electronics so that all cal orimeter signals are directly digitized and sent to the off-detector elect ronics in the counting room. To achieve the required reliability\, redunda ncy has been introduced at different levels. Three different options are p resently being investigated for the front-end electronic upgrade. Which on e to use will be decided after extensive test beam studies. 10 Gbps optica l links are used to read out all digitized data to the counting room while 5 Gbps down-links are used for synchronization\, configuration and detect or control. For the off-detector electronics a pre-processor (ROD) is bein g developed\, which takes care of the initial trigger processing while tem porarily storing the main data flow in pipeline and de-randomizer memories .\n\nhttps://indico.inp.nsk.su/event/0/contributions/47/ LOCATION: URL:https://indico.inp.nsk.su/event/0/contributions/47/ END:VEVENT END:VCALENDAR