The new CMS DAQ system for LHC operation after 2014 (DAQ2)
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Paus_The new cms.pdf
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1.59 MB
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Author(s)
Lavinia Darlea, Georgiana
Gomez-Ceballos, Guillelmo
Paus, Christoph M. E.
Raginel, Olivier
Veverka, Jan
Bauer, Gerry P
Sumorok, Konstanty C
Date Issued
June 2014
Journal
Journal of Physics: Conference Series
Publisher
IOP Publishing
Citation
Bauer, Gerry, Tomasz Bawej, Ulf Behrens, James Branson, Olivier Chaze, Sergio Cittolin, Jose Antonio Coarasa, et al. “The New CMS DAQ System for LHC Operation after 2014 (DAQ2).” Journal of Physics: Conference Series 513, no. 1 (June 11, 2014): 012014.
Version
Final published version
Abstract
The Data Acquisition system of the Compact Muon Solenoid experiment at CERN assembles events at a rate of 100 kHz, transporting event data at an aggregate throughput of 100 GByte/s. We are presenting the design of the 2nd generation DAQ system, including studies of the event builder based on advanced networking technologies such as 10 and 40 Gbit/s Ethernet and 56 Gbit/s FDR Infiniband and exploitation of multicore CPU architectures. By the time the LHC restarts after the 2013/14 shutdown, the current compute nodes, networking, and storage infrastructure will have reached the end of their lifetime. In order to handle higher LHC luminosities and event pileup, a number of sub-detectors will be upgraded, increase the number of readout channels and replace the off-detector readout electronics with a μTCA implementation. The second generation DAQ system, foreseen for 2014, will need to accommodate the readout of both existing and new off-detector electronics and provide an increased throughput capacity. Advances in storage technology could make it feasible to write the output of the event builder to (RAM or SSD) disks and implement the HLT processing entirely file based.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1088/1742-6596/513/1/012014
