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CERN Preprints

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2017-02-27
13:40
Flexible trigger menu implementation on the Global Trigger for the CMS Level-1 trigger upgrade / Matsushita, Takashi (Imperial Coll., London) /CMS Collaboration
The CMS experiment at the Large Hadron Collider (LHC) has continued to explore physics at the high-energy frontier in 2016. The integrated luminosity delivered by the LHC in 2016 was 41~fb$^{-1}$ with a peak luminosity of 1.5 $\times$ 10$^{34}$ cm$^{-2}$s$^{-1}$ and peak mean pile-up of about 50, all exceeding the initial estimations for 2016. [...]
CMS-CR-2017-013.- Geneva : CERN, 2017 - 8 p. Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

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2017-02-27
13:39
Fast emulation of track reconstruction in the CMS simulation / Komm, Matthias (Louvain U.) /CMS Collaboration
Simulated samples of various physics processes are a key ingredient within analyses to unlock the physics behind LHC collision data. Samples with more and more statistics are required to keep up with the increasing amounts of recorded data. [...]
CMS-CR-2017-018.- Geneva : CERN, 2017 - 6 p. Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

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2017-02-27
13:39
The CMS Data Acquisition - Architectures for the Phase-2 Upgrade / Andre, Jean-marc Olivier (Fermilab) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Brummer, Philipp Maximilian (CERN) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; Contescu, Cristian (Fermilab) ; Craigs, Benjamin Gordon (CERN) ; Darlea, Georgiana Lavinia (MIT) ; Deldicque, Christian (CERN) et al.
The upgraded High Luminosity LHC, after the third Long Shutdown (LS3), will provide an instantaneous luminosity of $7.5\times10^{34}$ cm$^{-2} s^{-1}$ (levelled), at the price of extreme pileup of up to 200 interactions per crossing. In LS3, the CMS Detector will also undergo a major upgrade to prepare for the phase-2 of the LHC physics program, starting around 2025. The upgraded detector will be read out at an unprecedented data rate of up to 50 Tb/s and an event rate of 750 kHz. [...]
CMS-CR-2017-030.- Geneva : CERN, 2017 - 9 p. Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

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2017-02-27
13:39
New operator assistance features in the CMS Run Control System / Andre, Jean-marc Olivier (Fermilab) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Brummer, Philipp Maximilian (CERN) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; Contescu, Cristian (Fermilab) ; Craigs, Benjamin Gordon (CERN) ; Darlea, Georgiana Lavinia (MIT) ; Deldicque, Christian (CERN) et al.
The Run Control System of the Compact Muon Solenoid (CMS) experiment at CERN is a distributed Java web application running on Apache Tomcat servers. During Run-1 of the LHC, many operational procedures have been automated. [...]
CMS-CR-2017-039.- Geneva : CERN, 2017 - 9 p. Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

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2017-02-27
13:39
Monitoring of the data processing and simulated production at CMS with a web-based service the Production Monitoring Platform (pMp) / Norkus, Antanas (Vilnius U.) /CMS Collaboration
Physics analysis at the Compact Muon Solenoid (CMS)requires botha vast production of simulated eventsand an extensive processing of the data collected by the experiment.Since the end of the LHC runI in 2012, CMS has produced over 20 Billion simulated events,from 75 thousand processing requestsorganised in one hundred different campaigns,which emulate different configurations of collision events, CMS detector and LHC running conditions.In the same time span, sixteen data processing campaigns have taken place toreconstruct different portions of the runI and runII data with ever improving algorithms and calibrations.The scale and complexity of the events simulation and processingand the requirement that multiple campaigns must proceed in parallel,demand that a comprehensive, frequently updated and easily accessible monitoringbe made available to the CMS collaboration.Such monitoring must serve both the analysts,who want to know which and when datasets will become available,and the central teams in charge of submitting, prioritizing and running the requestsacross the distributed computing infrastructure of CMS.The Production Monitoring Platform (pMp) web-based service, has been developedin 2015 to address those needs. It aggregates information from multiple servicesused to define, organize and run the processing requests; pMp updates hourlya dedicated Elastic database, and provides multiple configurable viewsto assess the status of single datasets as well as entire production campaigns.This contribution will coverthe pMp development,the evolution of its functionalitiesand one and half year of operational experience..
CMS-CR-2017-040.- Geneva : CERN, 2017 - 6 p. Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

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2017-02-27
13:38
Python object-oriented framework for consuming, manipulating and releasing non-event data for the CMS alignment and calibration. / Dawes, Joshua Heneage (CERN) /CMS Collaboration
The Alignment, Calibrations and Databases group at the CMS Experiment delivers Alignment and Calibration Conditions Data to a large set of workflows which process recorded event data and produce simulated events. The current infrastructure for releasing and consuming Conditions Data was designed in the two years of the first LHC long shutdown to respond to use cases from the preceding data-taking period. [...]
CMS-CR-2017-042.- Geneva : CERN, 2017 - 9 p. Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

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2017-02-27
13:36
Continuous and fast calibration of the CMS experiment design of the automated workflows and operational experience. / Oramus, Piotr Karol (CERN) ; Cerminara, Gianluca (CERN) ; Pfeiffer, Andreas (CERN) ; Franzoni, Giovanni (CERN) ; Govi, Giacomo Maria (Fermilab) ; Musich, Marco (Louvain U.) ; Di Guida, Salvatore (INFN, Naples) /CMS Collaboration
The exploitation of the full physics potential of the LHC experimentsrequires fast and efficient processing of the largest possible datasetwith the most refined understanding of the detector conditions. Toface this challenge, the CMS collaboration has setup an infrastructure for thecontinuous unattended computation of the alignment and calibrationconstants, allowing for a refined knowledge of the most time-criticalparameters already a few hours after the data have been saved to disk.This is the prompt calibration framework which, since the beginning ofthe LHC Run-I, enables the analysis and the High Level Trigger of theexperiment to consume the most up-to-date conditions optimizingthe performance of the physics objects. [...]
CMS-CR-2017-058.- Geneva : CERN, 2017 - 9 p. Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

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2017-02-27
13:36
Monitoring of the infrastructure and services used to handle and automatically produce Alignment and Calibration conditions at CMS / Sipos, Roland (Eotvos U.) /CMS Collaboration
The Compact Muon Solenoid (CMS) experiment makes a vast use of alignment and calibration measurements in several crucial workflows in the event selection at the High Level Trigger (HLT), in the processing of the recorded collisions and in the production of simulated events.A suite of services addresses the key requirements for the handling of the alignment and calibration conditions such as recording the status of the experiment and of the ongoing data taking, accepting conditions data updates provided by the detector experts, aggregating and navigating the calibration scenarios, and distributing conditions for consumption by the collaborators. Since a large fraction of such services is critical for the data taking and event filtering in the HLT, a comprehensive monitoring and alarm generating system had to be developed. [...]
CMS-CR-2017-062.- Geneva : CERN, 2017 - 7 p. Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

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2017-02-27
13:25
Overview talk on detector performances in run II (CMS) / Borrello, Laura (INFN, Pisa) /CMS Collaboration
The CMS experiment at the LHC successfully collected data in 2015 during proton-proton collision at 13 TeV center of mass energy and lead-lead collision at 5.02 TeV/nucleon. An intense activity has been performed to further improve the detector and the trigger before the LHC restart in 2016. [...]
CMS-CR-2016-456.- Geneva : CERN, 2016 - 7 p. Fulltext: PDF;
In : 5th International Conference on New Frontiers in Physics, Kolymbari, Greece, 6 - 14 Jul 2016

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2017-02-27
13:25
CMS operations for Run II preparation and commissioning of the offline infrastructure / Cerminara, Gianluca (CERN) /CMS Collaboration
The restart of the LHC coincided with an intense activity for the CMS experiment. Both at the beginning of Run II in 2015 and the restart of operations in 2016, the collaboration was engaged in an extensive re-commissioning of the CMS data-taking operations. [...]
CMS-CR-2016-467.- Geneva : CERN, 2016 - 8 p. Fulltext: PDF;
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016

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