Author/Authors :
Adeva، نويسنده , , B. and Afanasyev، نويسنده , , L. and Benayoun، نويسنده , , M. and Benelli، نويسنده , , A. and Berka، نويسنده , , Z. and Brekhovskikh، نويسنده , , V. and Caragheorgheopol، نويسنده , , G. and Cechak، نويسنده , , T. and Chiba، نويسنده , , Oswaldo M. Del Cima، نويسنده , , E. and Constantinescu، نويسنده , , S. and Detraz، نويسنده , , C. and Dreossi، نويسنده , , D. and Drijard، نويسنده , , D. and Dudarev، نويسنده , , A. and Ev، نويسنده ,
Abstract :
The DIRAC spectrometer has been commissioned at CERN with the aim of detecting π+π− atoms produced by a 24 GeV/c high intensity proton beam in thin foil targets. A challenging apparatus is required to cope with the high interaction rates involved, the triggering of pion pairs with very low relative momentum and the measurement of the latter with resolution around 0.6 MeV/c. The general characteristics of the apparatus are explained and each part is described in some detail. The main features of the trigger system, data-acquisition, monitoring and set-up performances are also given.
Keywords :
DIRAC experiment , Pion scattering , Elementary atom , experimental techniques , Double arm spectrometer
