학술논문

The proposed level-3 trigger system for STAR

Document Type

Periodical

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

IEEE Transactions on Nuclear Science IEEE Trans. Nucl. Sci. Nuclear Science, IEEE Transactions on. 47(2):358-361 Apr, 2000

Subject

Nuclear Engineering
Bioengineering
Data acquisition
Laboratories
Plasma accelerators
Event detection
Production systems
Performance analysis
Prototypes
Accelerated aging
Large-scale systems
Filtering

Language

ISSN

0018-9499
1558-1578

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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