The Anticoincidence Shield of the Pamela Satellite Experiment

The PAMELA experiment consists of a magnetic spectrometer, a transition radiation detector, an electromagnetic imaging calorimeter with a shower-tail catcher and a scintillator-based time-of-flight system. It will be launched late 2002 / early 2003. The spectrometer is surrounded by a scintillator-based anticoincidence system consisting of four lateral and one top anticounter which will help in discriminating against out-of-acceptance triggers. A simulation study has been made to determine how backscattering from the calorimeter affects the capability to reject background events.