Investigation of Electromagnetic Calorimeters Employing Undepleted Silicon Detectors

The application of silicon detectors in electromagnetic calorimetry has only recently begun, following the development of large area detectors of low resistivity which can successfully operate undepleted (not fully depleted). This paper describes investigations of longitudinal electromagnetic shower development in calorimeters employing silicon detectors as active medium. A comparison of calorimeters employing tungsten, uranium and lead is presented. Also a study of the dependence of the energy response of a silicon sampling calorimeter on the depletion depths of the silicon detectors, with tungsten as an absorber, is given.