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Bailey, S.J.; Brandenburg, G.W.; Felt, N.; Fries, T.; Harder, S.; Morii, M.; Oliver, J.N.; Sinev, N.B.; Won, E.
IEEE transactions on nuclear science, 2004-Oct., 2004-10-00, 20041001, Letnik: 51, Številka: 5Journal Article
A new hardware trigger system based on tracks detected by a stereo drift chamber has been developed for the BABAR experiment at the Stanford Linear Accelerator Center. The z/sub 0/p/sub T/ Discriminator (ZPD) is capable of fast, three-dimensional reconstruction of charged particle tracks and provides rejection of background events due to beam particles interacting with the beam pipe at the first-level trigger. Over 1 gigabyte of data is processed per second by each ZPD module. Rapid track reconstruction has been realized using Xilinx Virtex-II FPGAs.
