A first-level calorimeter trigger for LHC experiments - design studies, and beam tests of a first prototype trigger system

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:54011

Watson, A T; Ermolin, Y; Garvey, J; Staley, R J ^[1]; Eisenhandler, E; Landon, M ^[2]; Gee, C N.P.; Gillman, A R ^[3]

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1. Univ. of Birmingham (United Kingdom)
2. Queen Mary and Westfield College, London (United Kingdom)
3. Rutherford Appleton Lab., Oxfordshire (United Kingdom); and others

First-level triggering for LHC proton-proton collider experiments poses significant experimental challenges. At a luminosity of 10{sup 34} cm{sup {minus}2} s{sup {minus}1} the inelastic proton-proton collision rate will be approximately 1 GHz. With a bunch-crossing interval of 25 ns this corresponds to approximately 25 collisions per bunch-crossing. The level-1 accept rate will be limited by the readout time of the front-end electronics to less than 100 kHz, requiring a rejection factor of 10{sup 4}-10{sup 5}. Physics signatures will be based upon combinations of high-p{sub T} leptons, photons, partons and weakly-interacting particles, and therefore the trigger must be sensitive to these particles. This paper describes tests of a first prototype calorimeter trigger processor and developments in the design of a complete first-level calorimeter trigger system.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• OSTI ID: 54011
• Report Number(s): LBL--35822; CONF-940492--; ON: DE95004442
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
99 GENERAL AND MISCELLANEOUS
COLLIDING BEAMS
DESIGN
PERFORMANCE TESTING
PROTON-PROTON INTERACTIONS
RADIATION DETECTORS
TRIGGER CIRCUITS