The electromagnetic calorimeter first level trigger system of the COMET experiment
Epshteyn L. B.1,2, Grigoriev D. N.1,2, Shoukavy Dz. V.3
1 Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk State Technical University, Novosibirsk, Russia
3B.I.Stepanov Institute of Physics of the National Academy of Sciences of Belarus, Minsk, Belarus
Email: L.B.Epshteyn@inp.nsk.su
The first level trigger system of the COMET electromagnetic calorimeter, which performs real-time analysis of calorimeter data, is described. Experimental measurements were carried out on the electron beam of the first level trigger system equipment using the proposed algorithm: the overall efficiency at energy release above 30 MeV was 99.4 %, above 40 MeV - 99.7 %, and the own energy resolution of the first level trigger system was better than 5 % for registered signal events (electrons with an energy of 105 MeV). The trigger signal latency measurements between event generation time and its arrival at the digitizing boards measuring channels were made. Keywords: Trigger system, trigger algorithm, clustering algorithm, digital signal processing, electronics.
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