Coupled radiation-conduction heat transfer in layered composite scintillation ceramics

The layered ceramic scintillator has become a new type of optical ceramic with high single crystal utilization and strong ability to discern pulse shape. However, there are few studies on the radiation-conduction heat transfer propagation and intensity change in the layered ceramic scintillator. Based on the layered composite ceramic GGAG/YAG, this paper reports a three-dimensional optical radiation transmission model solved by path divergence method. The coupled radiation-conduction heat transfer at various distances from GGAG ceramic to the YAG ceramic is calculated. It is found that this method can accurately and efficiently obtain heat transfer in composite scintillation ceramics. The radiation intensity decays exponentially with the distance after passing through the interface between the two layers of layered ceramics. The smaller the incident angle of radiation, the greater the radiation intensity. When the angle of incidence approaches 35 degrees, the curve begins to distort. When the radiation passes through the ceramic and enters the air, the radiation decays approximately linearly.