Outdoor stand-off interrogation of fissionable material with a hybrid coded imaging system

A hybrid coded imaging and detection system developed at the U.S. Naval Research Laboratory (NRL) was used for active interrogation measurements with pulsed bremsstrahlung at the Hermes-III facility at Sandia National Laboratories, Albuquerque. This work follows previous experiments performed in 2011 [1] and explores different targets and system conditions to the previous work. The techniques used and challenges encountered during this work are described.