Design and Implementation of the New D0 Level-1 Calorimeter Trigger
2008
Increasing luminosity at the
Fermilab
Tevatroncollider has led the D0 collaboration to make improvements to its detector beyond those already in place for Run IIa, which began in March 2001. One of the cornerstones of this Run IIb upgrade is a completely redesigned level-1
calorimetertrigger system. The new system employs novel architecture and algorithms to retain high efficiency for interesting events while substantially increasing rejection of background. We describe the design and implementation of the new level-1
calorimetertrigger hardware and discuss its performance during Run IIb data taking. In addition to strengthening the physics capabilities of D0, this trigger system will provide valuable insight into the operation of
analogous devicesto be used at LHC experiments.
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