The ATLAS level-1 trigger: Status of the system and experience from commissioning with cosmic ray muons

6533b856fe1ef96bd12b2eaf

RESEARCH PRODUCT

The ATLAS level-1 trigger: Status of the system and experience from commissioning with cosmic ray muons

Thomas Trefzger Michele Bianco Hans-christian Schultz-coulon Barbara Liberti F.c. Pastore Mariagrazia Alviggi T. Sugimoto S. Patricelli Masahiro Ikeno Roberto Cardarelli Karlheinz Meier Yuta Takahashi T. Niwa Riccardo Vari Atsuhiko Ochi M. Bendel Hiroshi Sakamoto Johannes Haller Neil Collins A. Hidvegi H. Kiyamura N. Kanaya B. ÅSman B. Bauss Paolo Camarri Stefan Tapprogge Alessandro Polini E. Solfaroli David Berge Mitsuaki Nozaki D. De Pedis Yorito Yamaguchi M. Johansen Thorsten Wengler Kiyotomo Kawagoe E. E. Woehrling Osamu Sasaki R. Deasmundis P. M. Watkins Givi Sekhniaidze S. Antonelli P. Giusti M. Perantoni M. Biglietti Y. Benhammou A.o. Davis Murrough Landon T. Kadosaka Attila Krasznahorkay Yasuyuki Okumura Margherita Primavera V.j.o. Perera C. Geweniger P. Klofver A. R. Gillman Dave Charlton Christian Ohm Tohru Takeshita R. Santonico R.j. Staley Samuel Silverstein Masaya Ishino E. Eisenhandler Aleandro Nisati E. E. Kluge G. Mikenberg Enrico Pasqualucci S. Ben Amii T. Kuwabara A. Bruni Mark Stockton Enrique Kajomovitz F. Marchese Anna Rita Migliaccio S. I. Buda M. Dogaru Francesco Conventi Frederik Rühr M.r. Coluccia Takashi Kubota Yoshiji Yasu J. N. Lilley Sten Hellman P. Gallno Giuseppe Iacobucci C. Bohm W. Qian D. P. F. Prieur Paolo Iengo Gabriele Chiodini Andrea Messina V. Andrei Erez Etzion Masaharu Nomachi A. Di Girolamo R. Spiwoks Paul Hanke S. Constantin Thilo Pauly Shlomit Tarem Dave Sankey S. Rieke Gianpaolo Carlino T. Moa H. Takeda Giulio Aielli G. Bruni F. Spila P. Farthouat Bruce Barnett C. N. P. Gee S. Ask M. Dellapietra A. Diciaccio Chikara Fukunaga Stefano Rosati R. Lifshitz J.m. De Seixas A. Salamon F. Grancagnolo Yoji Hasegawa C. Omachi P.j.w. Faulkner Rainer Stamen L. Zanello Claudio Luci Kunihiro Nagano S. Eckweiler J. Fleckner N. Lupu Nicolas Ellis B. Oltmann S. Haas Stefania Spagnolo H. Nomoto Daniel Lellouch Alberto Aloisio T. Kawamoto A. Roich G. Ciapetti G. Mahout T. Kobayashi K. Schmitt D. Caracinha R. Achenbach W. Ehrenfeld M. Pectu Edoardo Gorini Simon Head Uli Schäfer L. Bellagamba C. J. Curtis Hiroyuki Iwasaki Lorne Levinson H.p. Lima F. Föhlisch Stephen Hillier A. Di Mattia D. Boscherini P. Adragna Alan Watson Yorihito Sugaya Emilio Petrolo A. Neusiedl Makoto Tomoto P. Weber J. R.a. Booth Vincenzo Izzo V. Lendermann D. Dellavolpe Stefano Veneziano H. Oshita L. P. Brawn O.b. Treidel S. Tanaka Vincenzo Canale K. Mahboubi G. Schuler Hisaya Kurashige Roberto Perrino J. P. Thomas Shikma Bressler

subject

Physics Muon Large Hadron Collider Calorimeter (particle physics)Physics::Instrumentation and Detectors Real-time computing Detector Cosmic ray Nuclear physics medicine.anatomical_structure Atlas (anatomy)Nuclear electronics Systems architecture medicine Physics::Accelerator Physics

description

The detector at CERN's large hadron collider (LHC) was exposed to proton-proton collisions from beams crossing at 40 MHz. A three-level trigger system will select potentially interesting events in order to reduce this rate to 100- 200 Hz. A trigger decision is made by the Level-1 central trigger processor (CTP) reducing the incoming rate to less than 100 kHz. The Level-1 decision is based on calorimeter information and hits in dedicated muon trigger detectors. The final Level-1 trigger system is currently being installed in the experiment with completion expected in autumn 2007. Cosmic ray data are regularly recorded as an increasing fraction of the trigger system comes online. We present an overview of the Level-1 trigger system architecture and report on the installation and commissioning process at the ATLAS experimental site. Emphasis is put on the integration of the CTP with the calorimeter and muon trigger systems. We show results from analyses of cosmic ray data recorded in situ and verify, where possible, that the Level-1 trigger meets the requirements and will be ready for data taking.

year	journal	country	edition	language
2007-01-01	2007 IEEE Nuclear Science Symposium Conference Record

https://doi.org/10.1109/nssmic.2007.4436573