Title :
Event building in an intelligent network interface card for the LHCb DAQ system
Author :
Dufey, J.P. ; Jost, B. ; Neufeld, N. ; Zuin, M.
Author_Institution :
EP Div., CERN, Geneva, Switzerland
fDate :
8/1/2001 12:00:00 AM
Abstract :
LHCb is an experiment being constructed at CERN´s Large Hadron Collider accelerator for the purpose of studying precisely the charge and parity violation parameters in the B-B meson 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 four-level triggering scheme (Level-0 to Level-3) has been implemented. Full event building is performed between Level-1 and Level-2. Powerful embedded processors, used in modern intelligent network interface cards, are attractive to use to handle the event-building protocol in the high-speed data-acquisition system. The implementation of an event-building algorithm developed for a specific gigabit Ethernet network interface controller is presented, and results from performance measurements are discussed
Keywords :
Cherenkov counters; data acquisition; high energy physics instrumentation computing; local area networks; nuclear electronics; trigger circuits; Large Hadron Collider accelerator; event-building algorithm; event-building protocol; four-level triggering scheme; gigabit Ethernet network interface controller; high-speed data-acquisition system; intelligent network interface card; intelligent network interface cards; Buildings; Data acquisition; Detectors; Ethernet networks; Hardware; Intelligent networks; Large Hadron Collider; Mesons; Network interfaces; Protocols;
Journal_Title :
Nuclear Science, IEEE Transactions on
