Author/Authors :
Agodi، نويسنده , , C. and Bassi، نويسنده , , A. and Bassini، نويسنده , , R. and Bellia، نويسنده , , G. and Benovic، نويسنده , , M. and Boiano، نويسنده , , C. and Brambilla، نويسنده , , S. and Coniglione، نويسنده , , R. and Cosentino، نويسنده , , L. and Finocchiaro، نويسنده , , P. and Hlavac، نويسنده , , S. and Iori، نويسنده , , I. and Koenig، نويسنده , , W. and Kugler، نويسنده , , A. and Maiolino، نويسنده , , C. and Marek، نويسنده , , T. and P، نويسنده ,
Abstract :
In the framework of the High Acceptance DiElectron Spectrometer collaboration a Time-of-Flight wall subdetector has been developed. In order to efficiently select rare events with dilepton pairs produced in the nuclear matter, in a high hadron multiplicity environment, such a wall must be able to resolve electrons from pions up to 0.5 GeV/c and from protons up to 2 GeV/c. The short flight path of about 2 m requires a time resolution better than 150 ps, while impact position and multiplicity measurements need adequate granularity. These requirements have been fulfilled by employing scintillator rods read-out at both ends by photomultipliers.
Keywords :
Dileptons , Scintillators , Time-of-flight , Spectrometer
