Abstract
We have constructed and operated a high-speed parallel pipelined event processor, used to trigger data acquisition in a massive muon pair experiment at Fermilab. The processor is constructed of simple, general-purpose modules designed to operate on 16-bit data words synchronously and in parallel at speeds up to 40 MHz. It uses information from hodoscopes and wire chambers to reconstruct tracks in the bend view of a magnetic spectrometer, calculating an approximation to transverse momentum ( p t) for each track and mass for the most massive pair in an event. Its algorithm is designed to find tracks originating in the target and reject tracks originating in the beam dump. Under typical running conditions, the processor rejects over 80% of lower-level triggers, while maintaining efficiency near 90% for massive muon pairs produced in the target.
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