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var global_caption = new Array("INL scientists have designed a system for the detection of smuggled nuclear materials.", "Dr. James Jones explains his nuclear materials detection technology during a demonstration at the Idaho Accelerator Center.", "The pulsed photonuclear neutron detector detects the presence of shielded nuclear material and can differentiate between highly enriched uranium, depleted uranium or thorium when a second beam at a different energy level is directed at the object.");