The "Road Warrior" for the CDF online silicon vertex tracker

The Online Silicon Vertex Tracker (SVT) is a new trigger processor dedicated to the 2-D reconstruction of charged particle trajectories at the level 2 of the CDF trigger. The SVT links the digitized pulse heights found within the Silicon Vertex Detector to the tracks reconstructed in the Central Outer Tracker by the level 1 Fast Track Finder. The SVT was recently modified in order to increase its efficiency. The new configuration uses all the Silicon Vertex detector layers. On the other hand the processing time has increased. This can be a problem at higher luminosities of the Tevatron. The "Road Warrior" is a new board that, eliminates redundant track candidates before the Track Fitting. It is based on the principle of the Associative Memory. The algorithm used is described in the paper, as well as the hardware implementation.