A bit-serial first-level calorimeter trigger for an LHC detector

Conference · Mon Aug 01 04:00:00 EDT 1994 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:7154889

Bohm, C; Appelquist, G; Zhao, X; Yamdagni, N; Hellman, S; Johansson, E; Sellden, B ^[1]

---

1. Univ. of Stockholm (Sweden)

A preliminary design of a compact first-level calorimeter trigger, implemented as a farm of local bit-serial systolic arrays, is presented. The bit-serial data representation allows higher processing rates and more compact designs than are possible when using parallel data. More functionally can be incorporated into the Application Specific Integrated Circuits (ASICs) that serve as the main processing elements. The trigger processor seeks local energy clusters, evaluates isolation criteria within the electromagnetic calorimeter and leakage into the hadron calorimeter in order to detect electrons. It uses cluster finding algorithms to identify jets and missing transverse energy to estimate neutrino energies. The processor output serves as decision support for the central first-level trigger and delivers region-of-interest positions to the second-level trigger. In its present form the trigger processor design relies on optical fibers to deliver the input data from the front-end modules and multi-chip modules (MCMs) to harbor the processing ASICs. The fact that the main part of the trigger processor can fit into one or two large crates suggests that the design is not limited by size nor is it strictly limited by cost but can be expanded to accommodate extended algorithms if these are found necessary. Extensive physics simulations will explore these possibilities.

• OSTI ID: 7154889
• Report Number(s): CONF-931051--
• Conference Information: Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 41:4Pt1
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303 -- Particle Accelerators-- Experimental Facilities & Equipment
440104* -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACCELERATORS
ARRAY PROCESSORS
COMMUNICATIONS
DATA PROCESSING
DATA TRANSMISSION
DESIGN
ELECTRONIC CIRCUITS
INTEGRATED CIRCUITS
MEASURING INSTRUMENTS
MICROELECTRONIC CIRCUITS
PARTICLE DISCRIMINATION
PARTICLE IDENTIFICATION
PROCESSING
PULSE CIRCUITS
RADIATION DETECTORS
SHOWER COUNTERS
TRIGGER CIRCUITS