Author/Authors :
Adeva، نويسنده , , B and Gallas، نويسنده , , M.V. and Gomez، نويسنده , , R. and Lopez Agüera، نويسنده , , A and N??ez-Pardo، نويسنده , , T and Pl?، نويسنده , , M and Rodr??guez، نويسنده , , A.M and Rodr??guez، نويسنده , , X.M and Saborido، نويسنده , , J.J and Santamarina، نويسنده , , C and Tobar، نويسنده , , M.J and V?zquez، نويسنده , , P، نويسنده ,
Abstract :
The construction and performance of a large area time-of-flight detector for the DIRAC experiment at CERN is reported. With an average time resolution of 123 ps per counter at rates up to 1 MHz, it allows excellent separation of pπ− from π+π− pairs up to 4.6 GeV/c momentum, as well as of Coulomb-correlated pion pairs from accidentals. The optimization of scintillator material, photomultiplier performance and readout electronics is described.
Keywords :
Dirac , Time of flight , Plastic scintillator , Particle identification
