Title :
Experience with the first level trigger of H1
Author :
Coughlan, J. ; Elsen, E. ; Krehbiel, H. ; Selkow, F. ; Straumann, U.
Author_Institution :
DESY, Hamburg, Germany
fDate :
30 Oct-5 Nov 1994
Abstract :
H1 is a high energy physics experiment at the electron proton collider HERA at DESY, routinely taking data since 1992. Calorimetric and tracking systems record the properties of the particles produced in the collisions in a total of 270000 electronic channels. The collision frequency of 10 MHz necessitates pipelining of all data in the centrally clocked trigger and front end readout systems. This report outlines the architecture of the trigger and data acquisition system and describes the experience gained in the first year of running the experiment. A crucial aspect is the clock phase adjustment and stability of all trigger signals
Keywords :
calorimeters; data acquisition; drift chambers; high energy physics instrumentation computing; multiwire proportional chambers; proportional counters; streamer chambers; synchronisation; trigger circuits; H1 detector; architecture; clock phase adjustment; data acquisition system; data pipelining; first level trigger; synchronization; trigger signal stability; Clocks; Detectors; Electrons; Event detection; Frequency; Mesons; Particle beams; Particle tracking; Protons; Stability;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record
Conference_Location :
Norfolk, VA
Print_ISBN :
0-7803-2544-3
DOI :
10.1109/NSSMIC.1994.474532
