ENABLE -- A systolic 2nd level trigger processor for track finding and e/[pi] discrimination for ATLAS/LHC

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

OSTI ID:6974041

Klefenz, F; Noffz, K H; Zoz, R ^[1]; Maenner, R ^[2]

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1. Univ. Mannheim (Germany). Lehrstuhl fuer Informatik V
2. Univ. Heidelberg (Germany). Interdisziplinaeres Zentrum fuer Wissenschaftliches Rechnen

The Enable Machine is a systolic 2nd level trigger processor for the transition radiation detector (TRD) of ATLAS/LHC. It is developed within the EAST/RD-11 collaboration at CERN. The task of the processor is to find electron tracks and to reject pion tracks according to the EAST benchmark algorithm in less than 10[mu]s. Track are identified by template matching in a ([psi],z) region of interest (RoI) selected by a 1st level trigger. In the ([psi],z) plane tracks of constant curvature are straight lines. The relevant lines form mask templates. Track identification is done by histogramming the coincidences of the templates and the RoI data for each possible track. The Enable Machine is an array processor that handles tracks of the same slope in parallel, and tracks of different slope in a pipeline. It is composed of two units, the Enable histogrammer unit and the Enable z/[psi]-board. The interface daughter board is equipped with a HIPPI-interface developed at JINR/-Dubna, and Xilinx 'corner turning' data converter chips. Enable uses programmable gate arrays (XILINX) for histogramming and synchronous SRAMs for pattern storage. With a clock rate of 40 MHz the trigger decision time is 6.5 [mu]s and the latency 7.0 [mu]s. The Enable machine is scalable in the RoI size as well as in the number of tracks processed. It can be adapted to different recognition tasks and detector setups. The prototype of the Enable Machine has been tested in a beam time of the RD6 collaboration at CERN in October 1993.

• OSTI ID: 6974041
• Report Number(s): CONF-931051-; CODEN: IETNAE; TRN: 94-023110
• Journal Information: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States), Vol. 41:4Pt1; Conference: NSS-MIC '93: nuclear science symposium and medical imaging conference, San Francisco, CA (United States), 30 Oct - 6 Nov 1993; ISSN 0018-9499
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
43 PARTICLE ACCELERATORS
ACCELERATORS
TRANSITION RADIATION DETECTORS
PARTICLE DISCRIMINATION
ARRAY PROCESSORS
DATA PROCESSING
COMPUTER ARCHITECTURE
DATA ANALYSIS
PARTICLE TRACKS
TRIGGER CIRCUITS
ELECTRONIC CIRCUITS
MEASURING INSTRUMENTS
PARTICLE IDENTIFICATION
PROCESSING
PULSE CIRCUITS
RADIATION DETECTORS
440104* - Radiation Instrumentation- High Energy Physics Instrumentation
430303 - Particle Accelerators- Experimental Facilities & Equipment