Rapid 3-D track reconstruction with the BABAR trigger upgrade

S. J. Bailey, G. W. Brandenburg, N. Felt, T. Fries, S. Harder, M. Morii, J. N. Oliver, N. B. Sinev, E. Won

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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 z0pT Discriminator (ZPD) is capable of fast, three-dimensional reconstruction of charged particle tracks and provides rejection of back-ground 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.

Original languageEnglish
Pages (from-to)2352-2355
Number of pages4
JournalIEEE Transactions on Nuclear Science
Issue number5 I
Publication statusPublished - 2004 Oct
Externally publishedYes


  • BaBar
  • Level-1 trigger
  • Tracking
  • ZPD

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering


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