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The first level trigger of ATLAS

Johannes Haller, R. Achenbach, G. Aielli, A. Aloisio, M. G. Alviggi, V. Aprodu, S. Ask, B.M. Barnett, D. Bartos, B. Bauss, A. Belkin, Y. Benhammou (+142 others)
2007 Proceedings of International Europhysics Conference on High Energy Physics — PoS(HEP2005)   unpublished

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Due to the huge interaction rates and the tough experimental environment of pp collisions at a centre-of-mass energy ¡ s ¢ 14 TeV and luminosities of up to 10 34 cm£ 2 s£ 1 , one of the experimental challenges at the LHC is the triggering of interesting events. In the ATLAS experiment a three-level tigger system is foreseen for this purpose. The first-level trigger is implemented in custom hardware and has been designed to reduce the data rate from the initial bunch-crossing rate of 40 MHz to
more » ... ound 75 kHz. Its event selection is based on information from the calorimeters and dedicated muon detectors. This article gives an overview over the full first-level trigger system including the Calorimeter Trigger, the Muon Trigger and the Central Trigger Processor. In addition, recent results are reported that have been obtained from test-beam studies performed at CERN where the full first-level trigger chain was established successfully for the first time and used to trigger the read-out of up to nine ATLAS sub-detector systems.
doi:10.22323/1.021.0391 fatcat:lw3plj4unzaxxfxje4w5acsvxa
Citation

Johannes Haller, R. Achenbach, G. Aielli, A. Aloisio, M. G. Alviggi, V. Aprodu, S. Ask, B.M. Barnett, D. Bartos, B. Bauss, A. Belkin, Y. Benhammou, V. Bocci, C. Bohm, J.R.A. Booth, E. Brambilla, I.P. Brawn, S. Bressler, S. Buda, V. Canale, D. Caracinha, Roberto Cardarelli, Gianpaolo Carlino, G. Cataldi, D. G. Charlton, G. Chiodi, G. Ciapetti, S. Constantin, F. Conventi, A.O. Davis, D. De Pedis, Jose DE SEIXAS, R. DeAsmundis, M. DellaPietra, Domenico della Volpe, A. Di Girolamo, A. Di Mattia, Anna Di Ciaccio, A. Di Simone, L. Distante, M. Dogaru, J. Edwards, E. Eisenhandler, N. Ellis, E. Etzion, P. Farthouat, F. Föhlisch, C. Fukunaga, P. Gallno, C. N.P. Gee, E. Gennari, C. Geweniger, A. R. Gillman, E. Gorini, F. Grancagnolo, S. Haas, P. Hanke, A. Harel, Y. Hasegawa, S. Hellman, A. Hidvégi, S.J. Hillier, R. Ichimiya, Paolo Iengo, M. Ikeno, M. Ishino, H. Iwasaki, V. Izzo, S. Kagawa, N. Kanaya, K. Kawagoe, T. Kawamoto, H. Kiyamura, E.-E. Kluge, T. Kobayashi, A. Krasznahorkay, H. Kurashige, T. Kuwabara, M. Landon, D. Lellouch, L. Levinson, R. Lifshitz, C. Luci, N. Lupu, C. Magureanu, K. Mahboubi, G. Mahout, K. Meier, A. Migliaccio, G. Mikenberg, A. Mirea, T. H. Moye, K. Nagano, A. Nisati, M. Nomachi, H. Nomoto, Mitsuaki Nozaki, Atsuhiko Ochi, T. Ogata, C. Omachi, H. Oshita, E. Pasqualucci, F. Pastore, S. Patricelli, T. Pauly, M. Pectu, M. Perantoni, V. J.O. Perera, R. Perrino, H. Junior Pessoa Lima, E. Petrolo, M. Primavera, L. Prodan, W. Qian, S. Rieke, F. Rühr, A. Rusu, Hiroshi Sakamoto, A. Salamon, D. P.C. Sankey, R. Santonico, O. Sasaki, U. Schäfer, K. Schmitt, G. Schuler, H. -C. Schultz Coulon, G. Sekhniaidze, S. Silverstein, S. Spagnolo, F. Spila, R. Spiwoks, R. J. Staley, Y. Sugaya, T. Sugimoto, H. Takeda, Tohru TAKESHITA, S. Tanaka, Stefan Tapprogge, S. Tarem, J. P. Thomas, T. Trefzger, D. Typaldos, C. Uroseviteanu, R. Vari, S. Veneziano, P. M. Watkins, A. Watson, Pavel WEBER, G. A. Weber, Thorsten Wengler, E. -E. Woehrling, Y. Yamaguchi, Y. Yasu, L. Zanello. "The first level trigger of ATLAS." Proceedings of International Europhysics Conference on High Energy Physics — PoS(HEP2005) (2007)