A novel structure for CdZnTe capacitive frisch grid radiation detector

CdZnTe gamma spectrometers with capacitive Frisch grid structure can potentially achieve a higher detecting resolution and their geometrical structures have an important role in optimizing the detector performance. In the paper, three geometrical structures of capacitive Frisch grid detectors were investigated by using Finite element method based on the 3-dimensional weighting potential and field distribution. Simulation results indicated the trapezoid prism model could get better detector performance, whose novel structure has not only a better weighting potential distribution but also a bigger detector volume than the cuboid models