Title :
A sequential processing strategy for the ATLAS event selection
Author :
Bystricky, J. ; Calvet, D. ; Ernwein, J. ; Gachelin, O. ; Hansl-Kozanecka, T. ; Hubbard, J.R. ; Huet, M. ; Le Du, P. ; Mandjavidze, I. ; Mur, M. ; Smizanska, M. ; Thooris, B.
Author_Institution :
CEA, Centre d´´Etudes Nucleaires de Saclay, Gif-sur-Yvette, France
fDate :
6/1/1997 12:00:00 AM
Abstract :
A new processing strategy for the ATLAS event selection system is proposed for use downstream of the first level trigger. It aims to achieve a reduction of the event rate to a level suitable for recording on permanent storage via a sequential treatment of the “regions of interest” selected by the level 1 trigger. A possible Trigger/DAQ architecture which exploits this concept is presented. It is based on a single processing farm and a network which transports data and protocol traffic. The resources necessary for the implementation of this architecture are estimated. A set of performance figures obtained by calculations and computer simulations are given assuming the use of ATM networking technology
Keywords :
detector circuits; nuclear electronics; ATLAS event selection; ATM networking technology; Trigger/DAQ architecture; architecture; computer simulations; event rate reduction; first level trigger; level 1 trigger; network data transport; permanent storage; protocol traffic; sequential processing strategy; single processing farm; Asynchronous transfer mode; Bandwidth; Computer architecture; Computer simulation; Data acquisition; Large Hadron Collider; Performance analysis; Telecommunication traffic; Traffic control; Transport protocols;
Journal_Title :
Nuclear Science, IEEE Transactions on
