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19 July 1996 Mobile associated particle imaging system
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Associated particle imaging (API) is a technique that employs a small deuterium accelerator to accelerate deuterons into a tritium-impregnated target, producing coincident neutrons and alpha particles that travel in opposite directions. By detecting the arrival of an alpha particle on a phosphor, and its position in two dimensions, the time and direction of the neutron emission id determined. Neutrons that interact with material in their paths produce a gamma ray whose energy is characteristic of that material. From the arrival time and energy of these gammas, the elemental composition of an object can be deduced as a function of position. We have built a portable API system and conducted field tests. In these tests, we have identified a quantity of fertilizer 'hidden' in a closed vehicle and the contents of some common military munition casings.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James R. Tinsley, Leslie Drake, Jack L. Guerrier, Garrett Headley, Charles L. Hudson, Paul Hurley, and Laura Tunnell "Mobile associated particle imaging system", Proc. SPIE 2859, Hard X-Ray/Gamma-Ray and Neutron Optics, Sensors, and Applications, (19 July 1996);


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