Performance of the upgraded PreProcessor of the ATLAS Level-1 Calorimeter Trigger

ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


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.

Original languageEnglish (US)
Article numberP11016
JournalJournal of Instrumentation
Issue number11
StatePublished - Nov 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
c 2020 CERN for the benefit of the ATLAS collaboration. Published by IOP Publishing Ltd on behalf of Sissa Medialab.


  • Calorimeters
  • Trigger concepts and systems (hardware and software)


Dive into the research topics of 'Performance of the upgraded PreProcessor of the ATLAS Level-1 Calorimeter Trigger'. Together they form a unique fingerprint.

Cite this