Author/Authors :
Ajaltouni، نويسنده , , Z. and Bohner، نويسنده , , G. and Carloganu، نويسنده , , C. and Cornat، نويسنده , , R. and Crouau، نويسنده , , M. and Deschamps، نويسنده , , O. and Henrard، نويسنده , , P. and Lecoq، نويسنده , , J. and Lefèvre، نويسنده , , R. and Monteil-Rivera، نويسنده , , S. and Perret-Gallix، نويسنده , , P. and Rimbault، نويسنده , , C. and Aguilo، نويسنده , , Ernest and Garrido، نويسنده , , Lluis and Gascon، نويسنده , , David and Gracia، نويسنده ,
Abstract :
The Lhcb experiment will study the CP symmetry violation in the system of the beauty particles. The detector is a 20-m-long spectrometer, to be installed on the proton–proton collider Lhc. Of major importance for the level 0 trigger is the preshower of the electromagnetic calorimeter designed to discriminate between electrons, hadrons and photons. The preshower cells consist of a two-radiation-length lead sheet located between two plastic scintillator planes. The scintillation light is extracted with wavelength-shifting fibres. The best candidates to read out the light of the 6000 detector cells are multianode photomultipliers. The HAMAMATSU photomultiplier R5900-00-M64 has been studied and its responses in terms of gain, linearity, uniformity within and between the anodes and cross-talk between the channels are addressed in this document.
Keywords :
Photomultipliers , Multianode , Read out , Preshower , LHCB
