Basic concepts and architectural details of the Delphi trigger system

Author

Bocci, V. ; Booth, P.S.L. ; Bozzo, M. ; Branco, A. ; Buytaer, J. ; Cairanti, S. ; Canale, Vincenzo ; Carniel, R. ; Cerrito, L. ; Charpentie, Ph ; Donszelmann, M. ; Formenti, F. ; Fuster, J. ; Gaspar, C. ; Gavilet, Ph. ; Giacomelli, P. ; Harris, F. ; Holmg

Author_Institution

CERN, Geneva, Switzerland

Volume

2

fYear

1994

fDate

30 Oct-5 Nov 1994

Firstpage

598

Abstract

Delphi (DEtector with Lepton, Photon and Hadron Identification) is one of the four experiment of the LEP (Large Electron Positron) collider at CERN. The detector is laid out to provide a nearly 4π coverage for charged particle tracking, electromagnetic, hadronic calorimetry and extended particle identification. The trigger system consists of four levels. The first two are synchronous with the BCO (Beam Cross Over) and rely on hard-wired control units, while the last two are performed asynchronously with respect to the BCO and are driven by the Delphi host computers. The aim of this paper is to give a comprehensive global view of the trigger system architecture presenting, in detail the first two levels, their various hardware components and the latest modifications introduced in order to improve their performance and make more user friendly the whole software user interface

Keywords

Cherenkov counters; data acquisition; high energy physics instrumentation computing; position sensitive particle detectors; semiconductor counters; Delphi detector; Pandora; Pythia; Zeus; architecture; hard-wired control units; software user interface; trigger system; Calorimetry; Computer architecture; Detectors; Electrons; Hardware; Particle tracking; Photon collider; Positrons; Software performance; User interfaces;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record

Conference_Location

Norfolk, VA

Print_ISBN

0-7803-2544-3

Type

conf

DOI

10.1109/NSSMIC.1994.474534

Filename

474534