Lynx: An unattended sensor system for detection of gamma-ray and neutron emissions from special nuclear materials

This manuscript profiles an unattended and fully autonomous radiation detection system sensitive to gamma-ray and neutron emissions. The L ynx design is intended for locations that require radiation detection capabilities for detection of special nuclear materials but lack supporting infrastructure. Signal-starved data is common in these environments since little or no control may be exerted over measurement conditions. The fundamental sensing elements of the L ynx system are traditional NaI(Tl) and 3He detectors. The new developments reported here center on two themes: low-power electronics and computationally simple analysis algorithms capable of discriminating gamma-ray signatures indicative of special nuclear materials from those of naturally occurring radioactive material. Incorporating tripwire-detection algorithms based on gamma-ray spectral signatures into a low-power electronics package significantly improves performance in environments where sensors encounter nuisance sources.