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The ATLAS Level-1 Trigger: Status of the System and First Results from Cosmic-Ray Data (2007) |
- Berge, D,
- Aielli, G,
- Andrei, V,
- Achenbach, R,
- Adragna, P,
- Aloisio, A,
- Alviggi, M G,
- Antonelli, S,
- Ask, S,
- Barnett, B M,
- Bauss, B,
- Bellagamba, L,
- Ben, S,
- Bendel, M,
- Benhammou, Ya,
- Bianco, M,
- Biglietti, M,
- Böhm, C,
- Booth, J R A,
- Boscherini, D,
- Brawn, I P,
- Bressler, S,
- Bruni, A,
- Bruni, G,
- Buda, S,
- Camarri, P,
- Canale, V,
- Caracinha, D,
- Cardarelli, R,
- Carlino, G,
- Charlton, D G,
- Chiodini, G,
- Ciapetti, G,
- Coluccia, M R,
- Constantin, S,
- Conventi, F,
- Curtis, C J,
- De Asmundis, R,
- Della Pietra, M,
- Della Volpe, D,
- Dogaru, M,
- Davis, A O,
- De Pedis, D,
- Di Ciaccio, A,
- Di, A,
- Eisenhandler, E F,
- Ellis, Nick,
- Etzion, E,
- Farthouat, P,
- Faulkner, P J W,
- Föhlisch, F,
- Fukunaga, C,
- Gällnö, P,
- Gee, C N P,
- Geweniger, C,
- Gillman, A R,
- Gorini, E,
- Grancagnolo, F,
- Giusti, P,
- Haas, S,
- Haller, J,
- Hanke, P,
- Hasegawa, Y,
- Hellman, S,
- Hidvégi, A,
- Hillier, S J,
- Iacobucci, G,
- Ikeno, M,
- Iengo, P,
- Ishino, M,
- Iwasaki, H,
- Izzo, V,
- Johansen, M,
- Kadosaka, T,
- Kajomovitz, E,
- Kanaya, N,
- Kawagoe, K,
- Kawamoto, T,
- Kiyamura, H,
- Klofver, P,
- Kobayashi, T,
- Kohno, T,
- Krasznahorkay, A,
- Kubota, T,
- Kurashige, H,
- Kuwabara, T,
- Landon, M,
- Lellouch, D,
- Lendermann, V,
- Levinson, L,
- Liberti, B,
- Lifshitz, R,
- Luci, C,
- Lupu, N,
- Mahboubi, K,
- Mahout, G,
- Marchese, F,
- Meier, K,
- Mikenberg, G,
- Migliaccio, A,
- Nagano, K,
- Nisati, A,
- Niwa, T,
- Nomachi, M,
- Nomoto, H,
- Nozaki, M,
- Ochi, A,
- Ohm, C,
- Okumura, Y,
- Omachi, C,
- Oshita, H,
- Patricelli, S,
- Pauly, T,
- Perantoni, M,
- Pessoa, H,
- Petrolo, E,
- Pasqualucci, E,
- Pastore, F,
- Pectu, M,
- Perera, V J O,
- Perrino, R,
- Polini, A,
- Prieur, D P F,
- Primavera, M,
- Qian, W,
- Rieke, S,
- Roich, A,
- Rosati, S,
- Rühr, F,
- Salamon, A,
- Sakamoto, H,
- Sankey, D P C,
- Santonico, R,
- Sasaki, O,
- Schäfer, U,
- Schmitt, K,
- Schuler, G,
- Schultz-Coulon, H C,
- De Seixas, J M,
- Sekhniaidze, G,
- Silverstein, S,
- Solfaroli, E,
- Spagnolo, S,
- Spila, F,
- Spiwoks, R,
- Staley, R J,
- Stamen, R,
- Sugaya, Y,
- Sugimoto, T,
- Takahashi, Y,
- Takeda, H,
- Takeshita, T,
- Tanaka, S,
- Tapprogge, S,
- Tarem, S,
- Thomas, J P,
- Tomoto, M,
- Bahat, O,
- Trefzger, T,
- Vari, R,
- Veneziano, S,
- Watkins, P M,
- Watson, A,
- Weber, P,
- Wengler, T,
- Woerling, E E,
- Yamaguchi, Y,
- Yasu, Y,
- Zanello, P
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Abstract |
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The ATLAS detector at CERN's Large Hadron Collider (LHC) will be exposed to proton-proton collisions from beams crossing at 40 MHz. At the design luminosity of 10^34 cm^-2 s^-1 there are on average 23 collisions per bunch crossing. A three-level trigger system will select potentially interesting events in order to reduce the read-out rate to about 200 Hz. The first trigger level is implemented in custom-built electronics and makes an initial fast selection based on detector data of coarse granularity. It has to reduce the rate by a factor of 10^4 to less than 100 kHz. The other two consecutive trigger levels are in software and run on PC farms. We present an overview of the first-level trigger system and report on the current installation status. Moreover, we show analysis results of cosmic-ray data recorded in situ at the ATLAS experimental site with final or close-to-final hardware. |
Publication details |
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