Development of detection system for compton camera

Objective: Design detectors and readout system were developed for Compton camera for hot spot imaging applications in nuclear facilities in this work. Methods: Two pixel CdZnTe detectors are used as the scattering layer and the absorption layer, respectively. The readout electronics system is composed of SRE4002 module, signal processing circuit, analog-to-digital conversion circuit and Main control board, etc. Data acquisition logic and control program are designed for Compton camera application, which facilitates the calibration of energy responses of all pixels by experiments. Results: The space resolution of the system is consistent with the pixel design. The total energy resolution and average energy resolution at 662 keV are about 3% after calibration. Conclusions: Both the space resolution and energy resolution of the system meet the requirements of the research of Compton camera. The calibration of the energy of each pixel improves energy resolution effectively. This hardware can provide a support for the imaging research of Compton camera or other γ imaging system. (authors)