title: The Upgrade of the PreProcessor of the ATLAS Level-1 Calorimeter Trigger for the LHC Run-2
creator: Jongmanns, Jan
subject: ddc-530
subject: 530 Physics
description: The Level-1 Calorimeter Trigger of the ATLAS experiment at CERN analyses 7200 analogue signals from the calorimeters within ~2 microseconds to identify objects with high transverse energy and to determine energy sums.  It consists of a PreProcessor, which digitises the signals, assigns them to the correct LHC bunch crossing and calibrates them to transverse energy, and two object finding processors.  During the first long shutdown of the LHC, the main processing unit of the PreProcessor, the ASIC-based Multichip Module, was replaced by an improved FPGA-based version to adapt to the increased rates and pile-up that are expected for Run-2.  The new Multichip Module builds upon the Run-1 signal processing implementation and expands it with enhanced noise filtering techniques, independent energy calibration for electromagnetic and hadronic objects, improved processing of saturated signals and bunch-crossing-wise pile-up subtraction.  This thesis describes the new Multichip Module, focussing on the improvements to the signal processing algorithms and the increased performance gained by their implementation.
date: 2017
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/23297/1/Jongmanns_PhD.pdf
identifier: DOI:10.11588/heidok.00023297
identifier: urn:nbn:de:bsz:16-heidok-232971
identifier:   Jongmanns, Jan  (2017) The Upgrade of the PreProcessor of the ATLAS Level-1 Calorimeter Trigger for the LHC Run-2.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/23297/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng