The multilevel trigger system of the DIRAC experiment (Journal article)

Afanasyev, L./ Gallas, M./ Goldin, D./ Gorin, A./ Karpukhin, V./ Kokkas, P./ Kulikov, A./ Kuroda, K./ Manuilov, I./ Okada, K./ Schuetz, C./ Sidorov, A./ Steinacher, M./ Takeutchi, F./ Tauscher, L./ Vlachos, S./ Yazkov, V.

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 respect to detectors' single rates, the detection efficiency of events in the relative momentum range of interest being greater than or equal to95%. (C) 2002 Elsevier Science B.V. All rights reserved.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών
Keywords: trigger,instrumentation,elementary atoms,network
ISSN: 0168-9002
Link: <Go to ISI>://000178547100003
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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