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The LEP OPAL Trigger and VME Based Data Collection

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10 Author(s)
Brisson, J.C. ; DPhPE, CEN - Saclay 91191 , Oif sur Yvette CeBx (France) ; Farthouat, Ph. ; Oandois, B. ; Oentit, F.X.
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The LEP OPAL data collection process is based on a distributed architecture of the 16/32 bit MC 68000 microprocessors associated with a coherent use of the VME bus. This paper describes this system which collects data from each detector branch and delivers the information through a hierarchical tree structure to a VME matrix interface where individual events are assembled and filtered, ready for delivery to mass storage.

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Nuclear Science, IEEE Transactions on  (Volume:33 ,  Issue: 1 )