685509 SzGeCERN 20180529221224.0 oai:cds.cern.ch:685509 cerncds:FULLTEXT WAI01 000011900 SPIRES 5581060 ATL-DAQ-2003-034 eng ATL-COM-DAQ-2003-015 CERN-ATL-DAQ-2003-034 Boisvert, V AUTHOR|(CDS)2068244 #BEARD# A New Implementation of the Region-of-Interest Strategy for the ATLAS Second Level Trigger 2003 Geneva CERN 11 Jun 2003 6 p 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. CC-BY-4.0 Preprint PUB SIS CERN EDS SIS ATLAS2003 SzGeCERN Detectors and Experimental Techniques SzGeCERN DAQ and Trigger CERN Region Selector CERN Region-of-Interest CERN Internal Note INTNOTEATLASPUBL INTNOTE PUBLATLAS CERN CERN LHC ATLAS Armstrong, S Baines, J T M Bee, C P Biglietti, M Bogaerts, A Bosman, M AUTHOR|(CDS)2050984 #BEARD# Brandt, S Caron, B Casado, M P Cataldi, G Cavalli, D Cervetto, M Comune, G Corso-Radu, A Di Mattia, A AUTHOR|(CDS)2071387 #BEARD# 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 Univ Bern Pinfold, J L AUTHOR|(CDS)2072623 #BEARD# 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 AUTHOR|(CDS)2108488 #BEARD# Touchard, F Vercesi, V Watson, A Wengler, T Werner, P Wheeler, S Wickens, F J Wiedenmann, W Wielers, M Zobernig, G EP CHEP 2003 Computing in High Energy Physics http://documents.cern.ch/cgi-bin/setlink?base=atlnot&categ=Note&id=daq-2003-034 Access to fulltext http://cds.cern.ch/record/685509/files/daq-2003-034.pdf Access to fulltext http://cds.cern.ch/record/685509/files/daq-2003-034.ps.gz Access to fulltext http://www.slac.stanford.edu/econf/C0303241/proc/papers/_vti_cnf/TUGT008.PDF Published version n 200345 91 20100906 0951 CER01 20031121 597895 lajolla20030324 PUBLIC 002411892CER INTNOTEATLASPUBL NOTE ConferencePaper