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FLARE - GRID Infrastructure for LHC Experiments

English title FLARE - GRID Infrastructure for LHC Experiments
Applicant Grab Christophorus
Number 173600
Funding scheme FLARE
Research institution Institut für Teilchen- und Astrophysik ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Particle Physics
Start/End 01.04.2017 - 31.03.2019
Approved amount 1'655'312.00
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Keywords (6)

GRID Computing; Large Data handling; Particle Physics; Information and Communication Technology; Big Data Analytics; Cloud computing

Lay Summary (German)

Das "Swiss Institute of Particle Physics (CHIPP)" ist stark im Projekt "Large Hadron Collider (LHC)" am CERN involviert.Die Schweiz ist Partner der "Worldwide LHC Computing Grid (WLCG)" Kollaboration, und also solche betreiben wir unser eigenes Grid Computing Zentrum um LHC Physik Analyse in der Schweiz durchzufuehren. Unser Zentrum steht am CSCS und ist direkt vernetzt mit den anderen weltweit operierenden Analysezentren des WLCG.
Lay summary

Das "Swiss Institute of Particle Physics (CHIPP)" ist  im Projekt "Large Hadron Collider  (LHC)" am CERN involviert.  Wir sind Mitglieder in den LHC Experimenten ATLAS, CMS und LHCb. Der LHC kollidiert Protonen mit Protonen. Eine erste Messrunde bei einer Schwerpunktsenergie von 7 und 8 TeV wurde im Januar 2013 erfolgreich abgeschlossen. Seit Sommer 2015 messen wir neue Daten bei einer höheren Protonen-Energie von 13 TeV.

Die gemessenen Daten erlauben es, die Strukturen von Materie zu untersuchen, und Bedingungen zu erzeugen, wie sie im frühen Universum vorherrschten, kurz nach dem "Big Bang". Einer der bisherigen Hoehepunkte war die Entdeckung eines neuen "Higgs Teilchens", eines der fundamentalen Bestandteile des "Standard Models der Teilchenphysik".  Bei den nun höheren Energien wird ein vollständig neuer Bereich der Physik abgedeckt.

Innerhalb dieses vorliegenden SNF/FLARE Projekts nimmt die Schweiz als vertraglicher Partner des WLCG die Aufgabe eines nationalen LHC Analysezentrums wahr. Zusammen mit CSCS betreibt CHIPP am CSCS unser eigenes Grid Computing Zentrum für LHC Physik Analyse, das als sogenanntes "Tier-2 regional centre" innerhalb des WLCG weltweit vernetzt operiert. Die bisherigen Daten (> 300 PBytes) werden weltweit verteilt, und ihre Analyse wird durch die weltweite Grid Computing Infrastruktur ermoeglicht, die durch die "Worldwide LHC Computing Grid (WLCG)" Kollaboration in Zusammenarbeit mit der Europäischen EGI betrieben wird.

Dieses Analysezentrum erlaubt den Schweizer Teilchenphysikern (der Uni. Bern, Genf und Zürich, ETH Zürich, EPFL Lausanne und Paul Scherrer Institut)  Forschung auf kompetitiver Augenhöhe mit anderen Nationalitäten zu betreiben. Damit können die von den Schweizer Hochschulen im LHC investierten Mittel, sei es in Form von Hardware oder Personal, sinnvoll ausgenuetzt und optimal für Physikanalyse eingesetzt werden, um so das Potential von neuer, aufregender Physik am LHC auszuschöpfen.

Direct link to Lay Summary Last update: 24.02.2017

Responsible applicant and co-applicants


Associated projects

Number Title Start Funding scheme
160433 FLARE: Maintenance & Operation for the LHC Experiments 2015 01.04.2015 FLARE
166925 FLARE - GRID Infrastructure for LHC Experiments 01.04.2016 FLARE
116726 FORCE 2007 - GRID Infrastructure for LHC Experiments 01.04.2007 FORCE / CERN
141289 FORCE - Support for CMS Tier-3 Analysis Facility 01.04.2012 FORCE / CERN
166294 Characterization of the Higgs Boson and Searches for Supersymmetry with CMS 01.04.2016 Project funding
147470 FLARE - GRID Infrastructure for LHC Experiments 01.04.2013 FLARE
124439 FORCE - GRID Infrastructure for LHC Experiments 01.04.2009 FORCE / CERN
147468 FLARE: Maintenance & Operation for the LHC Experiments 2013 01.04.2013 FLARE
129499 Particle Physics at the Large Hadron Collider (LHC) 01.04.2010 Project funding
178826 Measurement of Higgs Boson Properties and Upgrade of the CMS Pixel Detector for Phase-2 01.04.2018 Project funding
175625 Exploitation and Upgrades of the CMS experiment at the LHC 01.10.2017 Project funding
186238 FLARE 2019-2021: Operation, Computing and Upgrades of the CMS Experiment 01.04.2019 FLARE
182037 Research in High Energy Physics with the CMS detector: measurements and searches with top quarks 01.10.2018 Project funding
181984 Exploiting LHC data with machine learning and preparations for HL-LHC 01.10.2018 Project funding
185050 High Precision Flavour Physics at LHCb 01.04.2019 Project funding
186172 FLARE - Computing Infrastructure for LHC Experiments 01.04.2019 FLARE
154217 FLARE: Maintenance & Operation for the LHC Experiments 2014 01.04.2014 FLARE
160434 FLARE - GRID Infrastructure for LHC Experiments 01.04.2015 FLARE
112246 FORCE 2006 - GRID Infrastructure for LHC Experiments 01.04.2006 FORCE / CERN
105311 FORCE 2004 - GRID Computing Infrastructure for LHC Experiments 01.10.2004 FORCE / CERN
141092 Particle Physics at the Large Hadron Collider (LHC) 01.04.2012 Project funding
134622 FORCE - GRID Infrastructure for LHC Experiments 01.04.2011 FORCE / CERN
129890 FORCE - GRID Infrastructure for LHC Experiments 01.04.2010 FORCE / CERN
147466 FLARE Request: Operation, Computing and Upgrades of the CMS Experiment 01.04.2013 FLARE
154222 FLARE - GRID Infrastructure for LHC Experiments 01.04.2014 FLARE
141290 FORCE - GRID Infrastructure for LHC Experiments 01.04.2012 FORCE / CERN
134623 FORCE - Support for CMS Tier-3 Analysis Facility 01.04.2011 FORCE / CERN


After the long-shutdown-1 LS1) the LHC machine and the experiments have successfully operated in the so-called "Run-2", at the higher centre of mass energy of 13 TeV. The publications of physics results based on LHC data by the experiments ATLAS, CMS and LHCb are available online."WLCG", the worldwide LHC computing GRID community organization, continues to coordinate the main operational tools for the LHC experiments to reconstruct and analyze their data, as well as to per-form simulation tasks.The performance of the LHC during 2016 has been outstanding, and in particular the availability of stable beams has been on average at the level of 60% or even higher. This has to be compared with the 37% figure that has been used in the previous planning, in particular in the numbers discussed at the April 2016 computing resource review board (C-RRB) at CERN. Although this increase in availability together with additional improvements in instantanous luminosity (by some 30%) is very welcome by the experi-ments in terms of physics potential, the consequences are an increase in the average simultaneous p-p collisions for ATLAS and CMS (at order 33 instead of 21) and higher data rates which strongly stresses the computing infrastructures of the experiments during Run 2, with requirements of over 20% beyond the expectations. By fall 2016 the data acquisition produced over 10 PB of new data per month, and simulated events have to be added to this. The total resources provided by the WLCG community as of Sep 2016 constitutes 3.8 MHS06 , about 300 PB of disk storage and over 390 PB of tape storage. The data transfer rates have reached globally an unprecedented level of over 50 Gb/s sustained. The Swiss particle physics community continues its commitment to the LHC physics program, thus the overall reasoning for this present proposal has not changed compared to previous proposals. As a member of WLCG, Switzerland, has signed the computing MoU with WLCG, represented by CHIPP. All members of WLCG have committed themselves to contribute commensurate resources into WLCG for the profit of the overall community operation. Accordingly, we have made available a dedicated Swiss fa-cility for providing a) resources to the worldwide LHC community (as defined in the MoU), b) the means to allow performing LHC physics data analysis and simulation in Switzerland, and c) serving as a link to the national Tier-3 centres, supporting our own community. For this purpose CHIPP and CSCS established a cooperation in which CSCS functions as the Swiss “Tier-2 regional centre”.The resources granted upon our previous requests1 have been invested in the setting-up, and subse-quent operation of this national “Swiss Tier-2. Please note, that the hardware which is being phased out of operation at the Tier-2 due to reliability reasons, is re-used in our own Swiss Tier-3 facilities, thereby optimally capitalizing on our investments.The grants asked for in this present proposal will a cover TWO year period, and they will provide the re-sources for the next periods 1.4.2017-31.3.2019, as required from an officially acknowledged national Ti-er-2 centre as part of WLCG. The computing resource requirements of the LHC experiments are collect-ed by the WLCG management; they are monitored and scrutinized by the CERN "Computing Resources Scrutiny Group CRSG", and presented to the CERN-computing resource review board C-RRB. The data approved by the C-RRB serve as the basis for the funding requests in the various countries , also for Switzerland. In the present Europe-wide financially tense situation, the C-RRB advised the coun-tries in fall 2015 to assume a flat budget for the next few years. This allows us to project our expenditures over the next two years, and present a scheme of average resource growth based on such a constant flat budget. In addition, the exceptional performance of the LHC in 2016 necessitates a 20% increase of re-sources for the year 2017. While the C-RRB realizes that most countries cannot easily increase their funding by 20% for one year, the countries were asked on a voluntary basis to try to provide more re-sources than originally foreseen. Therefore the pledges for 2017/2018 are presently under revision in all countries, searching for extra funding. New, updated values for the pledges shall be available online on REBUS in Dec. 2016. Switzerland will continue assuming a flat budget model for the total resources, however tries to further optimize by re-evaluating the relative distribution of the resources among the experiments.The work is supervised by the CHIPP Computing Board under the auspices of the Swiss Institute of Parti-cle Physics (CHIPP). This board includes representatives from all Swiss particle physics institutes as well as CSCS. All institutes continue to rely on and strongly support the project. Further planning details are given in the following sections.