21-27 March 2009
Prague
Europe/Prague timezone

The CMS Computing, Software and Analysis Challenge

23 Mar 2009, 18:10
20m
Club E (Prague)

Club E

Prague

Prague Congress Centre 5. května 65, 140 00 Prague 4, Czech Republic
oral Event Processing Event Processing

Speaker

Dr Rainer Mankel (DESY)

Description

The CMS experiment has performed a comprehensive challenge during May 2008 to test the full scope of offline data handling and analysis activities needed for data taking during the first few weeks of LHC collider operations. It constitutes the first full-scale challenge with large statistics under the conditions expected at the start-up of the LHC, including the expected initial mis-alignments and mis-calibrations for each sub-detector, and event signatures and rates typical for low instantaneous luminosity. Particular emphasis has been given to the prompt reconstruction workflows, and to the procedures for the alignment and calibration of each sub-detector. The latter were performed with restricted latency using the same computing infrastructure that will be used for real data, and the resulting calibration and alignment constants were used to re-reconstruct the data at Tier-1 centres. The presentation addresses the goals and practical experience from the challenge, and the lessons learned in view of LHC data taking are discussed.

Primary authors

Dr David Futyan (Imperial College) Dr Rainer Mankel (DESY)

Presentation Materials