Unmanned Aerial System Integrated Sensor for Remote Gamma and Neutron Monitoring.

Tools for remote radiation sensing are essential for environmental safety and nuclear power applications. The use of unmanned aerial systems (UASs) equipped with sensors allows for substantially reducing the radiation exposure of personnel. An ambient temperature CsLiYCl:Ce (CLYC) elpasolite scintillation sensor for simultaneous gamma and neutron measurements was designed as a user-friendly "plug and fly" module integrated into an octocopter robotic platform. Robot Operating System (ROS) was used to analyze the sensor's data. The measured CLYC's energy resolution was <5% at 662 keV gamma rays; neutron flux was measured using Li(,α) reaction. Time and GPS data were combined with radiation data in the ROS, supporting real time monitoring and assessment tasks, as well as radiation source search missions. Because UASs can be irradiated, radiation damage of the sensor and robot's electronics was estimated using FLUKA code.