FTK: A Fast Track Trigger for ATLAS

J. Anderson, A. Andreani, A. Andreazza, A. Annovi, M. Atkinson, B. Auerbach, M. Beretta, V. Bevacqua, R. Blair, G. Blazey, M. Bogdan, A. Boveia, F. Canelli, A. Castegnaro, V. Cavaliere, F. Cervigni, P. Chang, Y. Cheng, M. Citterio, F. CrescioliM. Dell'Orso, G. Drake, M. Dunford, L. Fabbri, A. Favareto, M. Franchini, S. Geer, P. Giannetti, F. Giannuzzi, F. Giorgi, S. Gruenendahl, H. -L Li, J. Hoff, T. Iizawa, O. Jamieson, A. Kapliy, M. Kasten, Y. K. Kim, N. Kimura, A. Lanza, F. Lasagni, V. Liberali, T. Liu, D. Magalotti, A. McCarn, C. Melachrinos, C. Meroni, T. Mitani, P. Murat, A. Negri, M. Neubauer, Y. Okumura, B. Penning, M. Piendibene, J. Proudfoot, C. Roda, I. Sacco, Y. Sakurai, C. Sbarra, M. Shochet, A. Stabile, J. Tang, F. Tang, L. Tompkins, R. Tripiccione, J. Tuggle, S. Valentinetti, V. Vercesi, M. Verzocchi, M. Villa, G. Volpi, J. Webster, K. Yorita, J. Zhang, A. Zoccoli

Research output: Contribution to journalArticlepeer-review


We describe the design and expected performance of a the Fast Tracker Trigger (FTK) system for the ATLAS detector at the Large Hadron Collider. The FTK is a highly parallel hardware system designed to operate at the Level 1 trigger output rate. It is designed to provide global tracks reconstructed in the inner detector with resolution comparable to the full offline reconstruction as input of the Level 2 trigger processing. The hardware system is based on associative memories for pattern recognition and fast FPGAs for track reconstruction. The FTK is expected to dramatically improve the performance of track based isolation and b-tagging with little to no dependencies of pile-up interactions.

Original languageEnglish (US)
Article numberC10002
JournalJournal of Instrumentation
Issue number10
StatePublished - Oct 2012


  • Trigger algorithms
  • Trigger concepts and systems (hardware and software)

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics


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