Abstract
We describe the design, construction, and preliminary operation of a hardware track-finder used in the trigger for the Collider Detector at Fermilab (CDF). The track-finder is a 19 stage digital pipeline which uses fast timing information from the central tracking chamber (CTC) to find high momentum tracks. It then transmits information about the tracks to the CDF trigger system for a final decision. The track finder has 8 programmable thresholds between 2.5 and 15 GeV. A search for all high momentum tracks in the central tracking chamber can be completed in an average of 2.5 μs per event. The momentum resolution is δP t/ P t 2 = 3.5%, with a high efficiency that is independent of track density.
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