SCINTILLATION ELECTROMAGNETIC CALORIMETER WITH OPTICAL-FIBER LIGHT OUTPUT

This paper describes a scintillation calorimeter with an optical-fiber light output of 47 lead and 47 scintillation plates of sizes 2 x 70 x 70 and 5 x 70 x 70 mm, correspondingly. In total the unit is 17.3 rad iation-lengths thick. The unit was tested using electron beams with en ergies from 0.5 to 4.5 GeV. The energy resolution of the calorimeter i s sigma/E = (0.114 +/- 0.005)/square-root E, where E is expressed in g iga-electronvolts, and the coordinate resolution is at least 4 mm. The muon-electron separation coefficient is 400.