Beck, HP and Abolins, M and Battaglia, A and Blair, R and Bogaerts, A and Bosman, M and Ciobotaru, M and Cranfield, R and Crone, G and Dawson, J and Dobinson, R and Dobson, M and Dos Anjos, A and Drake, G and Ermoline, Y and Ferrari, R and Ferrer, ML and Francis, D and Gadomski, S and Gameiro, S and Gorini, B and Green, B and Haberichter, W and Haberli, C and Hauser, R and Hinkelbein, C and Hughes-Jones, R and Joos, M and Kieft, G and Klous, S and Korcyl, K and Kordas, K and Kugel, A and Leahu, L and Lehmann, G and Martin, B and Mapelli, L and Meessen, C and Meirosu, C and Misiejuk, A and Momacchi, G and Muller, M and Nagasaka, Y and Negri, A and Pasqualucci, E and Pauly, T and Petersen, J and Pope, B and Schlereth, J and Spiwoks, R and Stancu, S and Strong, J and Sushkov, S and Szymocha, T and Tremblet, L and Unel, G and Vandelli, W and Vernieulen, J and Werner, P and Wheeler-Ellis, S and Wickens, F and Wiedenmann, W and Yu, M and Yasu, Y and Zhang, J and Zobernig, H (2008) Performance of the final Event Builder for the ATLAS experiment. In: IEEE TRANSACTIONS ON NUCLEAR SCIENCE. (pp. 176 - 181). IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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Abstract
Event data from proton-proton collisions at the LHC will be selected by the ATLAS experiment by a three lev trigger system, which reduces the initial bunch crossing rate of 40 MHz at its first two trigger levels (LVL1+LVL2) to similar to 3 kHz. At this rate the Event-Builder collects the data from all Read-Out system PCs (ROSs) and provides fully assembled events to the the Event-Filter (EF), which is the third level trigger, to achieve a further rate reduction to similar to 200 Hz for permanent storage. The Event-Builder is based on a farm of O(100) PCs, interconnected via Gigabit Ethernet to O (150) ROSs. These PCs run Linux and multi-threaded software applications implemented in C++. All the ROSs and one third of the Event-Builder PCs are already installed and commissioned. Performance measurements have been exercised on this initial system, which show promising results that the required final data rates and bandwidth for the ATLAS event builder are in reach.
| Type: | Proceedings paper |
|---|---|
| Title: | Performance of the final Event Builder for the ATLAS experiment |
| Event: | 15th IEEE/NPSS Real-Time Conference 2007 |
| Location: | Batavia, IL |
| Dates: | 2007-04-29 - 2007-05-04 |
| DOI: | 10.1109/TNS.2007.910868 |
| Additional information: | Invalid ISBN GA read from Web of Science. |
| Keywords: | ATLAS, event building, high energy physics, LHC, TDAQ |
| UCL classification: | UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy |
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