The CDF Silicon Vertex Trigger

Details The CDF Silicon Vertex Trigger The CDF Silicon Vertex Trigger

2003-06-24

arxiv.org/abs/physics/0306169v1

Nucl.Instrum.Meth.A518:532-536,2004

Physics

Instrumentation and Detectors

4 pages. Talk presented at the 9th Pisa Meeting on Advanced Detectors, La Biodola, Isola d'Elba, May 25-31, 2003

Scientific paper

10.1016/j.nima.2003.11.078

The CDF experiment's Silicon Vertex Trigger is a system of 150 custom 9U VME boards that reconstructs axial tracks in the CDF silicon strip detector in a 15 microsecond pipeline. SVT's 35 micron impact parameter resolution enables CDF's Level 2 trigger to distinguish primary and secondary particles, and hence to collect large samples of hadronic bottom and charm decays. We review some of SVT's key design features. Speed is achieved with custom VLSI pattern recognition, linearized track fitting, pipelining, and parallel processing. Testing and reliability are aided by built-in logic state analysis and test-data sourcing at each board's input and output, a common inter-board data link, and a universal "Merger" board for data fan-in/fan-out. Speed and adaptability are enhanced by use of modern FPGAs.

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