Title :
Event building in an intelligent network interface card for the LHCb readout network
Author :
Dufey, J.-P. ; Jost, B. ; Neufeld, N. ; Zuin, M.
Author_Institution :
CERN, Geneva, Switzerland
Abstract :
LHCb is an experiment being constructed at CERN´s LHC accelerator for the purpose of studying precisely the CP violation parameters in the B-B system. Triggering poses special problems since the interesting events containing B-mesons are immersed in a large background of inelastic p-p reactions. Therefore, a 4 Level Triggering scheme (Level 0 to Level 3) has been implemented. Powerful embedded processors, used in modern intelligent Network Interface Cards (smart NICs), make it attractive to use them to handle the event building protocol in the high-speed data acquisition system of the LHCb experiment. The implementation of an event building algorithm developed for a specific Gigabit Ethernet NIC is presented and performance data are discussed
Keywords :
carrier sense multiple access; data acquisition; embedded systems; high energy physics instrumentation computing; local area networks; memory cards; network interfaces; nuclear electronics; particle calorimetry; position sensitive particle detectors; readout electronics; trigger circuits; 4 Level Triggering scheme; B-B system; CP violation parameters; Gigabit Ethernet; LHC accelerator; LHCb readout network; background inelastic p-p reactions; embedded processors; event building; event building algorithm; event building protocol; high-speed data acquisition; intelligent network interface card; performance data; Assembly systems; Buildings; Control systems; Data acquisition; Detectors; Ethernet networks; Intelligent networks; Large Hadron Collider; Mesons; Protocols;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2000 IEEE
Conference_Location :
Lyon
Print_ISBN :
0-7803-6503-8
DOI :
10.1109/NSSMIC.2000.949433
