Project Gatekeeper: An entrance control system embedded radiation detection capability for security applications.

Such assessments are given credence by public statements of intent by such groups/persons, by reports of attempts to acquire radioactive material, and by law enforcement actions which have interdicted, apprehended or prevented attempts to acquire such material.

As a mechanism through which to identify radioactive materials being transported on an individual’s person, this work sought to develop a detection system than is of lower-cost, reduced form-factor and more covert than existing infrastructure, while maintaining adequate sensitivity and being retrofittable into an industry standard and widely utilised Gunnebo Speed Gate system. The system developed comprised an array of six off-set Geiger-Muller detectors positioned around the gate, alongside a single scintillator detector for spectroscopy – triggered by the systems inbuilt existing IR proximity sensor.