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Number of topics: 48

Calibration and Alignment

Complete: 3

Note: this page is now outdated, please refer to the AlCaDB main page.

Mission Statement

The CMS Calibration and Alignment (AlCa) team coordinates the design and implementation of the CA infrastructure with the needs of the sub-detector groups.



Alignment & Calibration Software Coordinators



DPG and POG Database and HLT Contacts


Sub-Detector DPG/POG Contact Database Contact
Pixel tracker Viktor Veszpremi, Gavril Giurgiu, Urs Langenegger Gemma Tinti
Strip tracker Mario Galanti, Loic Quertenmont Gabriele Benelli
ECAL Marat Gataullin, Federico Ferri Jean Fay, Pierre Depasse
HCAL Willis Sakumoto Igor Vodopianov Steve Won
Muon DT Antonio Vilela Pereira Paolo Ronchese
Muon CSC Darin Baumgartel Igor Vorobiev
Muon RPC Marcello Maggi, Marcello Abbrescia Michal Szleper,Marcello Maggi
Beamspot Kevin Burket, Lenny Spiegel, Verena Martinez Kevin Burket, Lenny Spiegel
L1 conditions N/A Werner Sun
JEC Ricardo Eusebi, Mikko Voutilainen Kostas Kousoris, Salvatore Rappoccio
Tracker dE/dx templates Loic quertenmont Loic Quertenmont
BTag POG Cristina Ferro Cristina Ferro
Tau POG Evan Friis, Christian Veelken Evan Friis
Muon POG: P scale and resol Roberto Castello,Javier Santaolalla Roberto Castello,Javier Santaolalla
Muon POG: MC conditions validation Andrea Perrotta, Rocio Vilar Cortabitarte
Muon POG: data conditions validation Alicia Calderon Tazon
EGamma POG Yurii Maravin, Florian Beaudette
HI Analysis Objects Edward Wenger,Yetkin Yilmaz Edward Wenger,Yetkin Yilmaz
Castor Luiz Martins Mundim Filho


Sub-Detector DPG Contact Database Contact
Tracker Roberto Castello, Gero Flucke Roberto Castello, Gero Flucke
Muon DT Luca Scodellaro Luca Scodellaro
Muon CSC Yuriy Pakhotin Yuriy Pakhotin

Trigger Studies Group:

Calibration Stephanie Beauceron
Alignment Javier Fernandez

Heavy Ions:

Contact person: Bolek Wyslouch

Possible differences in calibration procedeures between pp and HI are summarized here

Open tasks in Alignment and Calibration

Important: a list of vacant tasks in alignment and calibration that we would like to fill very urgently can be found under CMS.AlCaJobs.

CMSSW Software

Release Planning

The list of new features planned for upcoming releases can be found here: AlCaReleasePlans

Submission of New Tags

To submit new tags for the release the developers are required to:

Release Validation

The list of validation contacts and validation results for each new release can be found here: SWGuideValidationTableAlCa NEW

The Matrix of which RelVals are run for which RelVal samples can be found here: AlCaRecoRelVals

Release Notes

Release notes relating to calibration and alignment can be found at SWGuideCalAliReleaseNotes31X NEW

The original list of deliverables for 31X is here: AlCa31XDeliverables

Global Tags for Conditions

For information on global tags for conditions data, including how to include conditions in a CMSSW job, see SWGuideFrontierConditions

Tag collector for the Global-Tag.

The instructions for the Tag collector for the Global-Tag can be found here

Policy for global tags for data taking

For details see GlobalTagPolicy

Operations and sign-off procedure for constants updates

The operational procedures for proposing constants updates can be found under AlCaConstantsOperations. The protocol of the constants sign-off sessions can be found under
and AlCaSignOff

Mis-calibration and mis-alignment scenarios

Some global tags for MC production apply a smearing of alignment and calibration constants defined through certain mis-calibration and mis-alignment scenarios. Details concerning these scenarios can be found here: AlCaScenarios.


The set of AlCaRecos to be run for each primary data set during different phases of data taking is documented here: AlCaRecoMatrix.

Trigger Bits for AlCaReco

The set of trigger paths used as input for each AlCaReco skim is documented here: SWGuideAlCaRecoTriggerBits


  • Instructions to use the Offline Drop Box can be found here
  • Instructions to upload DQM files to the DQM GUI can be found here
  • Intructions to use the crab/WMBS automation can be found here


Calibration and Alignment Workflows


Conditions Database


Policies and Conventions

Run-Based MC

* Please follow the instructions to prepare conditions tag for the run-based MC production test.

CSA07 and CSA08 Exercises

Other Links

Old Links

GT Management Tools


Review Status

Editor/Reviewer and Date Comments
Main.lueking - 05 Oct 2005 Page author
OanaBoeriu - 09 Mar 2007 page content last edited
JennyWilliams - 27 March 2007 transferred page into swguide

Responsible: Gianluca Cerminara
Responsible: ChiaraRovelli
Responsible: Marco De Mattia

Last reviewed by: Reviewer

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