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

ATLAS Collaboration,

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

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ATLAS Collaboration,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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ATLAS Collaboration (2020). Performance of the upgraded PreProcessor of the ATLAS Level-1 Calorimeter Trigger. Journal of Instrumentation, 15, P11016. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2020-66.

Cite as: https://hdl.handle.net/21.11116/0000-0008-1B43-F

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 in order to ensure optimal performance in the high pile-up environment of LHC Run 2. This paper describes the new Multichip Modules and the achieved improvements to the signal processing.