Title of article
The multilevel trigger system of the DIRAC experiment
Author/Authors
Afanasyev، نويسنده , , L. and Gallas، نويسنده , , M. and Goldin، نويسنده , , Maria D. and Gorin، نويسنده , , A. and Karpukhin، نويسنده , , V. and Kokkas، نويسنده , , Alexander P. and Kulikov، نويسنده , , A. and Kuroda، نويسنده , , K. and Manuilov، نويسنده , , I. and Okada، نويسنده , , K. and Schuetz، نويسنده , , C. and Sidorov، نويسنده , , A. and Steinacher، نويسنده , , M. and Takeutchi، نويسنده , , F. and Tauscher، نويسنده , , L. and Vlachos، نويسنده , , S. and Yazkov، نويسنده , , V.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2002
Pages
14
From page
376
To page
389
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 respect to detectors’ single rates, the detection efficiency of events in the relative momentum range of interest being ⩾95%.
Keywords
instrumentation , trigger , Elementary atoms
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Serial Year
2002
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Record number
2197323
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