Fast Track-Finding Trigger Processor for the SLAC/LBL Mark II Detector

The SLAC/LBL Mark II Magnetic Detector consists of various particle detectors arranged in cylindrical symmetry located in and around an axial magnetic field. A versatile, programmable secondary trigger processor has been designed and built to find curved tracks in the detector. The system operates at a 10 MHz clock rate with a total processing time of 34¿sec, and is used to "trigger" the data processing computer, thereby rejecting background and greatly improving the data acquisition aspects of the detector-computer combination.