Your Search Results

Use this resource - and many more! - in your textbook!

AcademicPub holds over eight million pieces of educational content for you to mix-and-match your way.

Experience the freedom of customizing your course pack with AcademicPub!
Not an educator but still interested in using this content? No problem! Visit our provider's page to contact the publisher and get permission directly.

Design, deployment and functional tests of the online event filter for the ATLAS experiment at LHC

By: Armstrong, S.; dos Anjos, A.; Baines, J.T.M.; Bee, C.P.; Biglietti, M.; Bogaerts, J.A.; Boisvert, V.; Bosman, M.; Caron, B.; Casado, P.; Cataldi, G.; Cavalli, D.; Cervetto, M.; Comune, G.; Muino, P.C.; De Santo, A.; Gomez, M.D.; Dosil, M.; Ellis, N.; Emeliyanov, D.; Epp, B.; Etienne, F.; Falciano, S.; Farilla, A.; George, S.; Ghete, V.; Gonzalez, S.; Grothe, M.; Kabana, S.; Khomich, A.; Kilvington, G.; Konstantinidis, N.; Kootz, A.; Lowe, A.; Luminari, L.; Maeno, T.; Masik, J.; di Mattia, A.; Meessen, C.; Mello, A.G.; Merino, G.; Moore, R.; Morettini, P.; Nikitin, N.; Nisati, A.; Padilla, C.; Panikashvili, N.; Parodi, F.; Reale, V.P.; Pinfold, J.L.; Pinto, P.; Qian, Z.; Resconi, S.; Rosati, S.; Sanchez, C.; Santamarina, C.; Scannicchio, D.A.; Schiavi, C.; Segura, E.; de Seixas, J.M.; Sivoklokov, S.; Soluk, R.; Stefanidis, E.; Sushkov, S.; Sutton, M.; Tapprogge, S.; Thomas, E.; Touchard, F.; Pinto, B.V.; Vercesi, V.; Werner, P.; Wheeler, S.; Wickens, F.J.; Wiedenmann, W.; Wielers, M.; Zobernig, G.;

2005 / IEEE

Description

This item was taken from the IEEE Periodical ' Design, deployment and functional tests of the online event filter for the ATLAS experiment at LHC ' The Event Filter (EF) selection stage is a fundamental component of the ATLAS Trigger and Data Acquisition architecture. Its primary function is the reduction of data flow and rate to values acceptable by the mass storage operations and by the subsequent offline data reconstruction and analysis steps. The computing instrument of the EF is organized as a set of independent subfarms, each connected to one output of the Event Builder (EB) switch fabric. Each subfarm comprises a number of processors analyzing several complete events in parallel. This paper describes the design of the ATLAS EF system, its deployment in the 2004 ATLAS combined test beam together with some examples of integrating selection and monitoring algorithms. Since the processing algorithms are not explicitly designed for EF but are adapted from the offline ones, special emphasis is reserved to system reliability and data security, in particular for the case of failures in the processing algorithms. Other key design elements have been system modularity and scalability. The EF shall be able to follow technology evolution and should allow for using additional processing resources possibly remotely located