A New Implementation of the Region-of-Interest Strategy for the ATLAS Second Level Trigger

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Among the many challenges presented by the future ATLAS detector at the LHC are the high data taking rate and volume and the derivation of a rapid trigger decis ion with limited resources. To address this challenge within the ATLAS second le vel trigger system, a Region-of-Interest mechanism has bee...

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Detalles Bibliográficos
Autores principales: Boisvert, V, Armstrong, S, Baines, J T M, Bee, C P, Biglietti, M, Bogaerts, A, Bosman, M, Brandt, S, Caron, B, Casado, M P, Cataldi, G, Cavalli, D, Cervetto, M, Comune, G, Corso-Radu, A, Di Mattia, A, Díaz-Gómez, M, Dos Anjos, A, Drohan, J, Ellis, Nick, Elsing, M, Epp, B, Etienne, F, Falciano, S, Farilla, A, George, S, Ghete, V M, González, S, Grothe, M, Kaczmarska, A, Karr, K M, Khomich, A, Konstantinidis, N P, Krasny, W, Li, W, Lowe, A, Luminari, L, Ma, H, Meessen, C, Mello, A G, Merino, G, Morettini, P, Moyse, E, Nairz, A, Negri, A, Nikitin, N V, Nisati, A, Padilla, C, Parodi, F, Pérez-Réale, V, Pinfold, J L, Pinto, P, Polesello, G, Qian, Z, Rajagopalan, S, Resconi, S, Rosati, S, Scannicchio, D A, Schiavi, C, Schörner-Sadenius, T, Segura, E, De Seixas, J M, Shears, T G, Sivoklokov, S Yu, Smizanska, M, Soluk, R A, Stanescu, C, Tapprogge, Stefan, Touchard, F, Vercesi, V, Watson, A, Wengler, T, Werner, P, Wheeler, S, Wickens, F J, Wiedenmann, W, Wielers, M, Zobernig, G
Lenguaje:eng
Publicado: 2003
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/685509
Descripción
Sumario:Among the many challenges presented by the future ATLAS detector at the LHC are the high data taking rate and volume and the derivation of a rapid trigger decis ion with limited resources. To address this challenge within the ATLAS second le vel trigger system, a Region-of-Interest mechanism has been adopted which dramat ically reduces the relevant fiducial volume necessary to be readout and processe d to small regions guided by the hardware-based first level trigger. Software ha s been developed to allow fast translation between arbitrary geometric regions a nd identifiers of small collections of the event data. This facilitates on-deman d data retrieval and collection building. The system is optimized to minimize th e amount of data transferred and unnecessary building of complex objects. Detail s of the design and implementation are presented along with preliminary performance results.

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