Author :
Dam, M. ; Dippel, R. ; Erhan, S. ; Gellrich, A. ; Hansen, J.D. ; Hansen, J.R. ; Kreuzer, P. ; Legrand, I. ; Leich, H. ; Luedemann, J. ; Medinnis, M. ; Rensch, B. ; Ressing, D. ; Scharein, S. ; Schmidt, S. ; Sulanke, K.H. ; Sun, E. ; Thurn, H. ; Wagner, G.
Abstract :
The HERA-B experiment is designed for observation of CP violation in the B-meson system at the HERA machine in DESY. The data acquisition and triggering system must cope with a half million detector channels, a 40 MHz interaction rate and a signal to background ratio of 10-10 . A highly selective multi-level trigger and high bandwidth data acquisition system has been designed and is currently being implemented. The second-level event buffer and mid-level trigger switch will be built from DSP boards carrying SHARC processors. The second and third level trigger code will run on a farm of 100-200 Pentium processors under Linux. The switch to the 4th level trigger farm will be based on Fast-Ethernet
Keywords :
data acquisition; high energy physics instrumentation computing; multiprocessing systems; nuclear electronics; trigger circuits; DSP boards; Fast-Ethernet; HERA-B experiment; Pentium processors; SHARC processors; high bandwidth data acquisition system; higher level trigger systems; highly selective multi-level trigger; mid-level trigger switch; second-level event buffer; triggering system; Bandwidth; Data acquisition; Delay; Detectors; Digital signal processing; Linux; Mesons; Physics; Spectroscopy; Switches;
