Implementation and performance of the ATLAS second level jet trigger

P. Conde Muiño, I. Aracena, B. Brelier, K. Cranmer, P. A. Delsart, M. A. Dufour, S. Eckweiler, J. Ferland, J. Idarraga, K. Johns, T. LeCompte, C. Potter, S. Robertson, C. Santamarina Rios, E. Segura, D. Silverstein, B. Vachon

    Research output: Contribution to journalArticle

    Abstract

    ATLAS is one of the four major LHC experiments, designed to cover a wide range of physics topics. In order to cope with a rate of 40MHz and 25 interactions per bunch crossing, the ATLAS trigger system is divided in three different levels. The jet selection starts at first level with dedicated processors that search for high ET hadronic energy depositions. At the LVL2, the jet signatures are verified with the execution of a dedicated, fast jet reconstruction algorithm, followed by a calibration algorithm. Three possible granularities have been proposed and are being evaluated: cell based (standard), energy sums calculated at each Front-End Board and the use of the LVL1 Trigger Towers. In this presentation, the design and implementation of the jet trigger of ATLAS will be discussed in detail, emphasazing the major difficulties of each selection step. The performance of the jet algorithm, including timing, efficiencies and rates will also be shown, with detailed comparisons of the different unpacking modes.

    Original languageEnglish (US)
    Pages (from-to)22029
    Number of pages1
    JournalJournal of Physics: Conference Series
    Volume119
    Issue number2
    DOIs
    StatePublished - Jul 1 2008

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    actuators
    towers
    central processing units
    time measurement
    signatures
    physics
    energy
    cells
    interactions

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Conde Muiño, P., Aracena, I., Brelier, B., Cranmer, K., Delsart, P. A., Dufour, M. A., ... Vachon, B. (2008). Implementation and performance of the ATLAS second level jet trigger. Journal of Physics: Conference Series, 119(2), 22029. https://doi.org/10.1088/1742-6596/119/2/022029

    Implementation and performance of the ATLAS second level jet trigger. / Conde Muiño, P.; Aracena, I.; Brelier, B.; Cranmer, K.; Delsart, P. A.; Dufour, M. A.; Eckweiler, S.; Ferland, J.; Idarraga, J.; Johns, K.; LeCompte, T.; Potter, C.; Robertson, S.; Santamarina Rios, C.; Segura, E.; Silverstein, D.; Vachon, B.

    In: Journal of Physics: Conference Series, Vol. 119, No. 2, 01.07.2008, p. 22029.

    Research output: Contribution to journalArticle

    Conde Muiño, P, Aracena, I, Brelier, B, Cranmer, K, Delsart, PA, Dufour, MA, Eckweiler, S, Ferland, J, Idarraga, J, Johns, K, LeCompte, T, Potter, C, Robertson, S, Santamarina Rios, C, Segura, E, Silverstein, D & Vachon, B 2008, 'Implementation and performance of the ATLAS second level jet trigger', Journal of Physics: Conference Series, vol. 119, no. 2, pp. 22029. https://doi.org/10.1088/1742-6596/119/2/022029
    Conde Muiño P, Aracena I, Brelier B, Cranmer K, Delsart PA, Dufour MA et al. Implementation and performance of the ATLAS second level jet trigger. Journal of Physics: Conference Series. 2008 Jul 1;119(2):22029. https://doi.org/10.1088/1742-6596/119/2/022029
    Conde Muiño, P. ; Aracena, I. ; Brelier, B. ; Cranmer, K. ; Delsart, P. A. ; Dufour, M. A. ; Eckweiler, S. ; Ferland, J. ; Idarraga, J. ; Johns, K. ; LeCompte, T. ; Potter, C. ; Robertson, S. ; Santamarina Rios, C. ; Segura, E. ; Silverstein, D. ; Vachon, B. / Implementation and performance of the ATLAS second level jet trigger. In: Journal of Physics: Conference Series. 2008 ; Vol. 119, No. 2. pp. 22029.
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