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1.
  • Aad, G, et al. (författare)
  • Performance of the upgraded PreProcessor of the ATLAS Level-1 Calorimeter Trigger
  • 2020
  • Ingår i: Journal of Instrumentation. - : IOP Publishing. - 1748-0221. ; 15:11
  • Tidskriftsartikel (refereegranskat)abstract
    • The PreProcessor of the ATLAS Level-1 Calorimeter Trigger prepares the analogue trigger signals sent from the ATLAS calorimeters by digitising, synchronising, and calibrating them to reconstruct transverse energy deposits, which are then used in further processing to identify event features. During the first long shutdown of the LHC from 2013 to 2014, the central components of the PreProcessor, the Multichip Modules, were replaced by upgraded versions that feature modern ADC and FPGA technology to ensure optimal performance in the high pile-up environment of LHC Run 2. This paper describes the features of the new Multichip Modules along with the improvements to the signal processing achieved. c 2020 CERN for the benefit of the ATLAS collaboration. Published by IOP Publishing Ltd on behalf of Sissa Medialab.
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2.
  • Mullier, G.A., et al. (författare)
  • Operation and performance of the ATLAS semiconductor tracker in LHC Run 2
  • 2022
  • Ingår i: Journal of Instrumentation. - : IOP Publishing Ltd. - 1748-0221. ; 17:1
  • Tidskriftsartikel (refereegranskat)abstract
    • The semiconductor tracker (SCT) is one of the tracking systems for charged particles in the ATLAS detector. It consists of 4088 silicon strip sensor modules. During Run 2 (2015-2018) the Large Hadron Collider delivered an integrated luminosity of 156 fb−1 to the ATLAS experiment at a centre-of-mass proton-proton collision energy of 13 TeV. The instantaneous luminosity and pile-up conditions were far in excess of those assumed in the original design of the SCT detector. Due to improvements to the data acquisition system, the SCT operated stably throughout Run 2. It was available for 99.9% of the integrated luminosity and achieved a data-quality efficiency of 99.85%. Detailed studies have been made of the leakage current in SCT modules and the evolution of the full depletion voltage, which are used to study the impact of radiation damage to the modules. © 2022 CERNüäβ
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