14-18 October 2013
Amsterdam, Beurs van Berlage
Europe/Amsterdam timezone

The new CMS DAQ system for LHC operation after 2014 (DAQ2)

17 Oct 2013, 13:30
Verwey Kamer (Amsterdam, Beurs van Berlage)

Verwey Kamer

Amsterdam, Beurs van Berlage

Oral presentation to parallel session Data acquisition, trigger and controls Data Acquisition, Trigger and Controls


Andre Georg Holzner (Univ. of California San Diego (US))


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 GB/s. By the time the LHC restarts after the 2013/14 shut-down, the current compute nodes, networking, and storage infrastructure infrastructure will have reached the end of their lifetime. In order to handle higher LHC luminosities / or event pile-up, a number of sub-detectors will be upgraded, increase the number of read-out channels and replace the off-detector read-out electronics with an implementation in the microTCA architecture. 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. 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 Gb/s Ethernet and 56 Gb/s FDR Infiniband and exploitation of multi-core CPU architecture.

Primary author


Andre Georg Holzner (Univ. of California San Diego (US))

Presentation Materials