Title :
CMS calorimeter trigger circuits
Author :
Smith, W.H. ; Dasu, S. ; Jaworski, M. ; Lackey, J. ; Panescu, D. ; Temple, W.
Author_Institution :
Wisconsin Univ., WI, USA
Abstract :
The CMS level 1 trigger decision is based in part upon local information from the level 1 calorimeter trigger about the presence of objects such as photons, electrons and jets, as well as global sums of E t and missing Et (to find neutrinos). The electron/photon trigger is based on the recognition of a large and isolated energy deposit in the electromagnetic calorimeter by asking for a small hadronic energy deposited in the HCAL in the cluster region. We present a description of the calorimeter regional trigger crates, the receiver card, the electron isolation card and the jet summary card
Keywords :
application specific integrated circuits; calorimeters; data acquisition; detector circuits; high energy physics instrumentation computing; nuclear electronics; position sensitive particle detectors; scintillation counters; table lookup; trigger circuits; ASIC; CMS calorimeter; electron isolation card; electron/photon trigger; jet summary card; level 1 trigger; look up tables; receiver card; regional trigger crates; trigger circuits; Clustering algorithms; Collision mitigation; Dynamic range; Electrons; Hardware; Mesons; Neutrino sources; Poles and towers; Trigger circuits; Vectors;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE
Print_ISBN :
0-7803-3180-X
DOI :
10.1109/NSSMIC.1995.504330
