Run 2 upgrades to the CMS Level-1 calorimeter trigger

B. Kreis, J. Berryhill, R. Cavanaugh, K. Mishra, R. Rivera, L. Uplegger, L. Apanasevich, J. Zhang, J. Marrouche, N. Wardle, R. Aggleton, F. Ball, J. Brooke, D. Newbold, S. Paramesvaran, D. Smith, M. Baber, A. Bundock, M. Citron, A. ElwoodG. Hall, G. Iles, C. Laner, B. Penning, A. Rose, A. Tapper, C. Foudas, F. Beaudette, L. Cadamuro, L. Mastrolorenzo, T. Romanteau, J. B. Sauvan, T. Strebler, A. Zabi, R. Barbieri, I. A. Cali, G. M. Innocenti, Y. J. Lee, C. Roland, B. Wyslouch, M. Guilbaud, W. Li, M. Northup, B. Tran, T. Durkin, K. Harder, S. Harper, C. Shepherd-Themistocleous, A. Thea, T. Williams, M. Cepeda, S. Dasu, L. Dodd, R. Forbes, T. Gorski, P. Klabbers, A. Levine, I. Ojalvo, T. Ruggles, N. Smith, W. Smith, A. Svetek, J. Tikalsky, M. Vicente

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


The CMS Level-1 calorimeter trigger is being upgraded in two stages to maintain performance as the LHC increases pile-up and instantaneous luminosity in its second run. In the first stage, improved algorithms including event-by-event pile-up corrections are used. New algorithms for heavy ion running have also been developed. In the second stage, higher granularity inputs and a time-multiplexed approach allow for improved position and energy resolution. Data processing in both stages of the upgrade is performed with new, Xilinx Virtex-7 based AMC cards.

Original languageEnglish (US)
Article numberC01051
JournalJournal of Instrumentation
Issue number1
StatePublished - Jan 21 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Mathematical Physics


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


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