The ATLAS Level-2 Trigger Pilot Project

The ATLAS Level-2 Trigger Pilot Project

The Level-2 Trigger Pilot Project of ATLAS, one of the two general purpose LHC experiments, is part of the on-going program to develop the ATLAS high-level triggers (HLT). The Level-2 Trigger will receive events at up to 100 kHz, which has to be reduced to a rate suitable for full event-building of...

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Veröffentlicht in:IEEE transactions on nuclear science 2002-06, Vol.49 (3), p.851-857
Hauptverfasser: Blair, R., Dawson, J., Haberichter, W., Schlereth, J., Bock, R., Bogaerts, A., Boosten, M., Dobinson, R., Dobson, M., Ellis, N., Elsing, M., Giacomini, F., Knezo, E., Martin, B., Shears, T., Tapprogge, S., Werner, P., Hansen, J.R., Waananen, A., Korcyl, K., Lokier, J., George, S., Green, B., Strong, J., Clarke, P., Cranfield, R., Crone, G., Sherwood, P., Wheeler, S., Hughes-Jones, R., Kolya, S., Mercer, D., Hinkelbein, C., Kornmesser, K., Kugel, A., Manner, R., Muller, M., Sessler, M., Simmler, H., Singpiel, H., Abolins, M., Ermoline, Y., Gonzalez Pineiro, B., Hauser, R., Pope, B., Sivoklokov, S., Boterenbrood, H., Jansweijer, P., Kieft, G., Scholte, R., Slopsema, R., Vermeulen, J., Baines, J.T., Belias, A., Botterill, D., Middleton, R., Wickens, F., Falciano, S., Bystricky, J., Calvet, D., Gachelin, O., Huet, M., Le Du, P., Mandjavidze, I., Levinson, L., Gonzalez, S., Wiedenmann, W., Zobernig, H.
Format: Artikel
Sprache:eng
Schlagworte:
Architecture
Bandwidth
Collection
Commodities
Computer architecture
Computer networks
Computer simulation
Construction
Laboratories
Large Hadron Collider
Nuclear physics
Operating systems
Pilots
System testing
Tasks
USA Councils
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Beschreibung
Zusammenfassung:The Level-2 Trigger Pilot Project of ATLAS, one of the two general purpose LHC experiments, is part of the on-going program to develop the ATLAS high-level triggers (HLT). The Level-2 Trigger will receive events at up to 100 kHz, which has to be reduced to a rate suitable for full event-building of the order of 1 kHz. To reduce the data collection bandwidth and processing power required for the challenging Level-2 task it is planned to use Region of Interest guidance (from Level-1) and sequential processing. The Pilot Project included the construction and use of testbeds of up to 48 processing nodes, development of optimized components and computer simulations of a full system. It has shown how the required performance can be achieved, using largely commodity components and operating systems, and validated an architecture for the Level-2 system. This paper describes the principal achievements and conclusions of this project.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2002.1039577