The multilevel trigger system of the DIRAC experiment
High Energy Physics - Experiment
2009-11-07 v1
Abstract
The multilevel trigger system of the DIRAC experiment at CERN is presented. It includes a fast first level trigger as well as various trigger processors to select events with a pair of pions having a low relative momentum typical of the physical process under study. One of these processors employs the drift chamber data, another one is based on a neural network algorithm and the others use various hit-map detector correlations. Two versions of the trigger system used at different stages of the experiment are described. The complete system reduces the event rate by a factor of 1000, with efficiency 95% of detecting the events in the relative momentum range of interest.
Cite
@article{arxiv.hep-ex/0202045,
title = {The multilevel trigger system of the DIRAC experiment},
author = {L. Afanasyev and M. Gallas and D. Goldin and A. Gorin and V. Karpukhin and P. Kokkas and A. Kulikov and K. Kuroda and I. Manuilov and K. Okada and C. Schuetz and A. Sidorov and M. Steinacher and F. Takeutchi and L. Tauscher and S. Vlachos and V. Yazkov},
journal= {arXiv preprint arXiv:hep-ex/0202045},
year = {2009}
}
Comments
21 pages, 11 figures