21-25 May 2012
New York City, NY, USA
US/Eastern timezone

Operational experience with the CMS Data Acquisition System

21 May 2012, 16:35
25m
Room 804/805 (Kimmel Center)

Room 804/805

Kimmel Center

Parallel Online Computing (track 1) Online Computing

Speaker

Hannes Sakulin (CERN)

Description

The data-acquisition (DAQ) system of the CMS experiment at the LHC performs the read-out and assembly of events accepted by the first level hardware trigger. Assembled events are made available to the high-level trigger (HLT), which selects interesting events for offline storage and analysis. The system is designed to handle a maximum input rate of 100 kHz and an aggregated throughput of 100 GB/s originating from approximately 500 sources and 10^8 electronic channels. An overview of the architecture and design of the hardware and software of the DAQ system is given. We report on the performance and operational experience of the DAQ and its Run Control System in the first two years of collider run of the LHC, both in proton-proton and Pb-Pb collisions. We present an analysis of the current performance, its limitations, and the most common failure modes and discuss the ongoing evolution of the HLT capability needed to match the luminosity ramp-up of the LHC.

Summary

The data-acquisition (DAQ) system of the CMS experiment at the LHC performs the read-out and assembly of events accepted by the first level hardware trigger. Assembled events are made available to the high-level trigger (HLT), which selects interesting events for offline storage and analysis. The system is designed to handle a maximum input rate of 100 kHz and an aggregated throughput of 100 GB/s originating from approximately 500 sources and 10^8 electronic channels. An overview of the architecture and design of the hardware and software of the DAQ system is given. We report on the performance and operational experience of the DAQ and its Run Control System in the first two years of collider run of the LHC, both in proton-proton and Pb-Pb collisions. We present an analysis of the current performance, its limitations, and the most common failure modes and discuss the ongoing evolution of the HLT capability needed to match the luminosity ramp-up of the LHC.

Primary author

Co-authors

Alexander Flossdorf (Deutsches Elektronen-Synchrotron (DE)) Andre Georg Holzner (Univ. of California San Diego (US)) Andrea Petrucci (CERN) Andrei Cristian Spataru (CERN) Dr Attila Racz (CERN) Aymeric Arnaud Dupont (CERN) Christian Deldicque (CERN) Christian Hartl (CERN) Christoph Paus (Massachusetts Inst. of Technology (US)) Christoph Schwick (CERN) Dennis Shpakov (Fermi National Accelerator Lab. (US)) Dominique Gigi (CERN) Emilio Meschi (CERN) Frank Glege (CERN) Frans Meijers (CERN) Gerry Bauer (Massachusetts Inst. of Technology (US)) Dr Giovanni Polese (CERN) James Branson (Univ. of California San Diego (US)) Dr Jeroen Hegeman (CERN) Dr Jose Antonio Coarasa Perez (CERN) Konstanty Sumorok (Massachusetts Inst. of Technology (US)) Lorenzo Masetti (CERN) Luciano Orsini (CERN) Dr Marc Dobson (CERN) Marco Pieri (Univ. of California San Diego (US)) Matteo Sani (Univ. of California San Diego (US)) Matthew Bowen (University of the West of England) Michal Simon Olivier Raginel (Massachusetts Inst. of Technology (US)) Remi Mommsen (Fermi National Accelerator Lab. (US)) Robert Gomez-Reino Garrido (CERN) Samim Erhan (Univ. of California Los Angeles (US)) Sebastian Bukowiec (CERN) Sergio Cittolin (Univ. of California San Diego (US)) Ulf Behrens (Deutsches Elektronen-Synchrotron (DE)) Vivian O'Dell (Fermi National Accelerator Laboratory (FNAL)) Yi Ling Hwong (CERN)

Presentation Materials