This paper presents a novel monitoring method for gamma irradiation facility, which has the advantages of big view, accurate and working in event of a power outage. The state of radioactive source is monitored based on the property of electrical signal curves from photovoltaic devices when they are facing the source frame, and these electrical signals are generated by radio-voltaic and photovoltaic effects. GaAs based photovoltaic device was selected as the module to convert the rays near the radioactive source into electrical signals by the two above effects, and a Co-60 facility for irradiation processing was used as monitored object in this work. The influence of parameters such as the distance between the Co-60 frame and the photovoltaic device array, better electrical signals for forming curves on the monitoring effect were analyzed by Geant4. And the monitoring effect of the Co-60 frame in many cases was studied by Geant4 and experiment. Simulation results show that there are optimal parameters to achieve best monitoring effect, and the distribution of the Co-60 rods on the frame, the working condition and integrity of the Co-60 frame can be clearly reflected with this method. The consistency of the tendency of the electrical signal curves in verification experiment and Geant4 simulation verified the feasibility of this monitoring method. This method may provide new ideas for monitoring system designed for irradiation facility, nuclear power plants and other scenarios with rays.

本文提出了一种新型的伽马辐照设备监测方法，该方法具有视野开阔，准确，断电等优点。当光伏设备面对源框架时，将根据来自光伏设备的电信号曲线的特性来监视放射源的状态，这些电信号是通过无线电和光伏效应产生的。选择基于GaAs的光伏器件作为模块，通过上述两种作用将放射性源附近的射线转换为电信号，并且在这项工作中使用Co-60辐照处理设备作为监视对象。Geant4分析了诸如Co-60框架与光伏器件阵列之间的距离，更好的电信号以形成曲线之类的参数对监测效果的影响。并通过Geant4和实验研究了Co-60框架在许多情况下的监控效果。仿真结果表明，有最佳参数可以达到最佳的监测效果，该方法可以清楚地反映出Co-60棒在机架上的分布，工作状况和Co-60机架的完整性。验证实验和Geant4仿真中电信号曲线趋势的一致性证明了该监测方法的可行性。该方法可以为针对辐射设施，核电厂和其他带有射线的场景设计的监视系统提供新思路。通过这种方法可以清楚地反映出Co-60棒在机架上的分布情况，Co-60机架的工作状态和完整性。验证实验和Geant4仿真中电信号曲线趋势的一致性证明了该监测方法的可行性。该方法可以为针对辐射设施，核电厂和其他带有射线的场景设计的监视系统提供新思路。通过这种方法可以清楚地反映出Co-60棒在机架上的分布情况，Co-60机架的工作状态和完整性。验证实验和Geant4仿真中电信号曲线趋势的一致性证明了该监测方法的可行性。该方法可以为针对辐射设施，核电厂和其他带有射线的场景设计的监视系统提供新思路。