Author/Authors :
Adler، نويسنده , , R. and Albrecht، نويسنده , , W. and Alhalel، نويسنده , , T. and Angelopoulos، نويسنده , , A. and Apostolakis، نويسنده , , A. and Aslanides، نويسنده , , E. and Backenstoss، نويسنده , , G. and Bal، نويسنده , , Fu-Ren F. and Bard، نويسنده , , J.P. and Barraca، نويسنده , , D. and Bee، نويسنده , , C.P. and Behnke، نويسنده , , O. and Benelli، نويسنده , , A. and Bennet، نويسنده , , J. and Bertin، نويسنده , , V. and Blanc، نويسنده , , F. a، نويسنده ,
Abstract :
The CPLEAR collaboration has constructed a detector at CERN for an extensive programme of CP-, T- and CPT-symmetry studies using K0 and K0 produced by the annihilation of pʹs in a hydrogen gas target. The K0 and K0 are identified by their companion products of the annihilation K±π∓ which are tracked with multiwire proportional chambers, drift chambers and streamer tubes. Particle identification is carried out with a liquid Cherenkov detector for fast separation of pions and kaons and with scintillators which allow the measurement of time of flight and energy loss. Photons are measured with a lead/gas sampling electromagnetic calorimeter. The required antiproton annihilation modes are selected by fast online processors using the tracking chamber and particle identification information. All the detectors are mounted in a 0.44 T uniform field of an axial solenoid of diameter 2 m and length 3.6 m to form a magnetic spectrometer capable of full on-line reconstruction and selection of events. The design, operating parameters and performance of the subdetectors are described.
