3D-position sensitive compact scintillation detector as absorber for a Compton-Camera

An absorption detector based on scintillator material and position-sensitive photomultipliers for a high resolution Compton-Camera prototype has been developed. The design of the Compton-Camera determines several demands on the absorption detector. For coincidence measurements a very fast trigger signal and due to the high rate of events a fast signal output is needed. The designated primary energy of the photons makes it necessary to use a thick scintillator material as absorber, which causes the problem of parallax effects in event reconstruction. Therefore a 3D-position resolution of the interaction point is obligatory which is achieved by using position-sensitive photomultiplier tubes (PS-PMT) for the readout of the scintillator. The design specifications and the performance of the complete detector will be presented in this poster.