The D0 calorimeter trigger

Conference · Tue Dec 01 04:00:00 EST 1992

OSTI ID:6920574

Guida, J ^[1]

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1. Brookhaven National Lab., Upton, NY (United States)

The D0 calorimeter trigger system consists of many levels to make physics motivated trigger decisions. The Level-1 trigger uses hardware techniques to reduce the trigger rate from [approximately] 100kHz to 200Hz. It forms sums of electromagnetic and hadronic energy, globally and in towers, along with finding the missing transverse energy. A minimum energy is set on these energy sums to pass the event. The Level-2 trigger is a set of software filters, operating in a parallel-processing microvax farm which further reduces the trigger rate to a few Hertz. These filters will reject events which lack electron candidates, jet candidates, or missing transverse energy in the event. The performance of these triggers during the early running of the D0 detector will also be discussed.

• Research Organization: Fermi National Accelerator Lab., Batavia, IL (United States)
• Sponsoring Organization: DOE; NSF; USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 6920574
• Report Number(s): FNAL/C-92/370; CONF-9209263--7; ON: DE93006838
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
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440104* -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACCELERATORS
ARRAY PROCESSORS
CYCLIC ACCELERATORS
DATA ACQUISITION SYSTEMS
ELECTRONIC CIRCUITS
ENERGY
FERMILAB TEVATRON
KINETIC ENERGY
MEASURING INSTRUMENTS
PARALLEL PROCESSING
PERFORMANCE
PROGRAMMING
PULSE CIRCUITS
RADIATION DETECTORS
SHOWER COUNTERS
SYNCHROTRONS
TRANSVERSE ENERGY
TRIGGER CIRCUITS