First level calorimeter trigger system for the Large Hadron Collider

Conference · Sun Aug 01 04:00:00 EDT 1993 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5946201

Eisenhandler, E ^[1]; Gee, N; Gillman, A; Perera, V; Quinton, S ^[2]; Ellis, N; Fensome, I; Garvey, J; Jovanovic, P; Staley, R; Watson, A ^[3]

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1. Univ. of London (United Kingdom). Queen Mary and Westfield Coll.
2. Rutherford Appleton Lab. (United Kingdom)
3. Univ. of Birmingham (United Kingdom)

As part of an R and D project to study first-level calorimeter triggers for LHC, the authors have designed an Application Specific integrated Circuit (ASIC) which will search for candidate electromagnetic (EM) clusters associated with a particular cell from a 4 x 4 area of the calorimeter. The ASIC takes in sixteen (4 x 4) 8-bit digitized signals from the calorimeter and will provide two results: (1) a flag to indicate the presence of an EM cluster.;(2) a sum over the 4 x 4 area which will be used in the subsequent logic in the trigger system to search for jets and to calculate missing transverse energy. In LHC the bunch-crossing period is 15 ns, and therefore the logic is implemented on the ASIC using a pipelined architecture, with pipeline steps of 15 ns. The algorithm has been implemented on a 0.8 micron CMOS gate array, and is packaged in a 179 pin ceramic Pin Grid Array. The ASIC has been tested above the full operating frequency of 67 MHz.

• OSTI ID: 5946201
• Report Number(s): CONF-921005--
• Conference Information: Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 40:4 part 1
• Country of Publication: United States
• Language: English

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43 PARTICLE ACCELERATORS
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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACCELERATORS
ALGORITHMS
COMPUTER ARCHITECTURE
DESIGN
ELECTRONIC CIRCUITS
INTEGRATED CIRCUITS
MATHEMATICAL LOGIC
MEASURING INSTRUMENTS
MICROELECTRONIC CIRCUITS
PULSE CIRCUITS
RADIATION DETECTORS
RESEARCH PROGRAMS
SHOWER COUNTERS
TRIGGER CIRCUITS