Abstract
This paper describes the optimization of the penumbral neutron imaging camera. The optimum parameters are qualified by practical considerations and the resulting camera is tested using a full Monte Carlo simulation. It is shown that an object emitting only 1.3×1010 neutrons/resolution element should be imageable. This result is confirmed by simulations of three different object shapes which indicate that the shape of the core of a compressed inertial confinement fusion pellet may be determined by this technique. It is further shown that these results correspond to the lowest possible imageable yield for any coded-aperture technique using the parameters assumed here. Finally, an alternative aperture and detector arrangement is briefly described which may lower the imageable yield by more than an order of magnitude.
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