Polaris-LAMP: Multi-Modal 3-D Image Reconstruction With a Commercial Gamma-Ray Imager

The Polaris-LAMP multi-modal 3-D gamma-ray imager is a radiation mapping and imaging platform which uses commercial off-the-shelf (COTS) detector integrated with contextual sensor localization platform. integration of these systems enables free-moving capability proximity mapping, coded-aperture, Compton modalities, can create reconstruction photon sources from tens keV to several MeV. Gamma-ray events are recorded using segmented cadmium zinc telluride (CZT) (Polaris-H Quad by H3D Inc., Ann Arbor, MI, USA), while scene data derived computation package developed Lawrence Berkeley National Laboratory includes GPS, laser ranging, inertial measurement sensors. An onboard computer inputs rapidly updating pose (10 Hz) estimates simultaneous (SLAM) algorithm. precise event location timing resolution the Polaris CZT above hundred keV, at lower images localized coded-aperture techniques. concept diverse spanning 59-keV emission 241 Am 1.1 1.3 MeV lines xmlns:xlink="http://www.w3.org/1999/xlink">60 Co. This work focuses on description operational principles system demonstrating performance in variety source detection scenarios. As proof concept, we demonstrate complex environments, including both point distributed-source environments proximity, modalities. Furthermore, show successful use perform measurements high-background through analysis arrays uranium hexafluoride cylinders Paducah UF6 project site.