Research Papers in Physics and Astronomy


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IEEE Trans. Nucl. Sci. 46, 933 (1999.) Published by IEEE. Permission to use. ©1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.


A trigger track processor is being designed for the CDF upgrade. This processor identifies high momentum (PT > 1.5 GeV/c) charged tracks in the new central outer tracking chamber for CDF 11. The track processor is called the extremely Fast Tracker (XFT). The XFT design is highly parallel to handle the input rate of 183 Gbits/sec and output rate of 44 Gbitslsec. The processor is pipelined and reports the results for a new event every 132 ns. The processor uses three stages, hit classification, segment finding, and segment linking. The pattern recognition algorithms for the three stages are implemented in programmable logic devices (PLDs) which allow for in-situ modification of the algorithm at any time. The PLDs reside on three different types of modules. Prototypes of each of these modules have been designed and built, and are presently undergoing testing. An overview of the track processor and results of testing are presented.

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