RESULTS FROM A MA16-BASED NEURAL TRIGGER IN AN EXPERIMENT LOOKING FORBEAUTY

Results from a neural-network trigger based on the digital MA16 chip o f Siemens are reported. The neural trigger has been applied to data fr om the WA92 experiment, looking for beauty particles, which have been collected during a run in which a neural trigger module based on Intel 's analog neural chip ETANN operated, as already reported. The MA16 bo ard hosting the chip has a 16-bit I/O precision and a 53-bit precision for internal calculations. It operated at 50 MHz, yielding a response time for a 16 input-variable net of 3 mu s for a Fisher discriminant (1-layer net) and of 6 mu s for a 2-layer net. Results are compared wi th those previously obtained with the ETANN trigger.