Run 2 Upgrades to the CMS Level-1 Calorimeter Trigger

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

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Run 2 Upgrades to the CMS Level-1 Calorimeter Trigger

Abstract

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.Comment: 10 pages, 7 figure