학술논문

The proposed level-3 trigger system for STAR

Document Type

Conference

Author

Adler, C.; Berger, J.; Demello, M.; Flierl, D.; Landgraf, J.; Lange, J.S.; LeVine, M.J.; Lindenstruth, V.; Ljubicic, A., Jr.; Nelson, J.; Roehrich, D.; Schafer, E.; Schambach, J.J.; Schmischke, D.; Schulz, M.W.; Stock, R.; Struck, C.; Yepes, P.

Source

1999 IEEE Conference on Real-Time Computer Applications in Nuclear Particle and Plasma Physics. 11th IEEE NPSS Real Time Conference. Conference Record (Cat. No.99EX295) NPSS real time conference Real Time Conference, 1999. Santa Fe 1999. 11th IEEE NPSS. :415-418 1999

Subject

Computing and Processing
Data acquisition
Laboratories
Event detection
LAN interconnection
Performance analysis
Prototypes
Large-scale systems
Particle tracking
Mass production
Particle production

Language

Abstract

The level-3 trigger system of the STAR experiment will in the final stage consist of a farm of 24 ALPHA/Linux processors, interconnected by SCI (Scalable Coherent Interface). The system will perform online tracking of N/sub track//spl ges/8000 tracks per event (N/sub point//spl les/45 per track). The track data will be transferred to a global level-3 CPU (expected data transfer rate /spl sime/48 MB/s), performing online event analysis tasks (e.g. invariant mass reconstruction) with a design trigger input rate of R=100 Hz (R=20 Hz for a prototype system).

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