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SUMMARY:Radiation hardness of the ATLAS Tile Calorimeter optical component
 s
DTSTART;VALUE=DATE-TIME:20201005T164500Z
DTEND;VALUE=DATE-TIME:20201005T170000Z
DTSTAMP;VALUE=DATE-TIME:20260306T203530Z
UID:indico-contribution-2312@cern.ch
DESCRIPTION:Speakers: Beatriz Catarina Pinheiro Pereira ()\nThe Tile Calor
 imeter (TileCal) is a sampling hadronic calorimeter and an essential part 
 of the ATLAS experiment at the LHC. The active material is made of plastic
  scintillating tiles\, and the light produced in the scintillators is tran
 smitted to the photomultiplier tubes by wavelength shifting fibres. During
  the High Luminosity LHC (HL-LHC) program\, the luminosity can reach a val
 ue seven times higher than the one that TileCal was designed for. Two crit
 ical points that affect the detector performance are the increased exposur
 e to radiation that will degrade the TileCal optics and natural ageing. Si
 nce the optical components of the TileCal cannot be replaced\, the radiati
 on hardness must be evaluated. The Laser and Cesium calibration systems ar
 e used to evaluate the robustness of the TileCal optical components. Takin
 g advantage of these systems it is possible to isolate the response of the
  tiles and fibres and evaluate the evolution of the yield light with the d
 ose. The results obtained during the Run 2 were extrapolated to the end of
  the HL-LHC phase\, indicating that around 50% of the TileCal cells will l
 ose up to 35% of the light yield response. These cells correspond to the l
 east exposed to radiation\, for the most exposed cells the loss of the lig
 ht yield is more pronounced. Nevertheless\, the extrapolation uncertainty 
 is large\, more data needs to be explored to reach better precision and fi
 ner conclusions. This study constitutes an essential step for predicting t
 he calorimeter performance in future runs.\n\nhttps://indico.particle.meph
 i.ru/event/35/contributions/2312/
LOCATION:Discord Poster Server
URL:https://indico.particle.mephi.ru/event/35/contributions/2312/
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