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SUMMARY:Phase-I Trigger Readout Electronics Upgrade for the ATLAS Liquid-A
 rgon Calorimeters
DTSTART;VALUE=DATE-TIME:20170303T022000Z
DTEND;VALUE=DATE-TIME:20170303T024000Z
DTSTAMP;VALUE=DATE-TIME:20260912T202806Z
UID:indico-contribution-1744@indico.inp.nsk.su
DESCRIPTION:Speakers: Bernard Dinkespiler (Centre de Physique des Particul
 es de Marseille)\nThe upgrade of the Large Hadron Collider (LHC) scheduled
  for shut-down period of 2018-2019\, referred to as Phase-I upgrade\, will
  increase the instantaneous luminosity to about three times the design val
 ue. Since the current ATLAS trigger system does not allow sufficient incre
 ase of the trigger rate\, an improvement of the trigger system is required
 . The Liquid Argon (LAr) Calorimeter read-out will therefore be modified t
 o use digital trigger signals with a higher spatial granularity in order t
 o improve the identification efficiencies of electrons\, photons\, tau\, j
 ets and missing energy\, at high background rejection rates at the Level-1
  trigger. The new trigger signals will be arranged in 34000 so-called Supe
 r Cells which achieves 5-10 times better granularity than the trigger towe
 rs currently used and allows an improved background rejection. The readout
  of the trigger signals will process the signal of the Super Cells at ever
 y LHC bunch-crossing at 12-bit precision and a frequency of 40 MHz.  The d
 ata will be transmitted to the back-end using a custom serializer and opti
 cal converter and 5.44 Gb/s optical links. In order to verify the full fun
 ctionality of the future Liquid Argon trigger system\, a demonstrator set-
 up has been installed on the ATLAS detector and is operated in parallel to
  the regular ATLAS data taking during the LHC Run-2. Noise level and linea
 rity on the energy measurement have been verified to be within our require
 ments. In addition\, we have collected data from 13 TeV proton collisions 
 during the LHC 2015 run\, and have observed real pulse from the detector t
 hrough the demonstrator system. The talk will give an overview of the Phas
 e-I Upgrade of the ATLAS Liquid Argon Calorimeter readout and present the 
 custom developed hardware including their role in real-time data processin
 g and fast data transfer. This contribution will also report on the perfor
 mance of the newly developed ASICs including their radiation tolerance and
  on the performance of the prototype boards in the demonstrator system bas
 ed on various measurements with the 13 TeV collision data. Results of the 
 high-speed link test with the prototypes of the final electronic boards wi
 ll be also reported.\n\nhttps://indico.inp.nsk.su/event/8/contributions/17
 44/
LOCATION:
URL:https://indico.inp.nsk.su/event/8/contributions/1744/
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