LLE Review 112 (July-September 2007)

This volume features the development of aperture tolerances for neutron-imaging systems in inertial confinement fusion. Neutron-imaging systems are being considered as an ignition diagnostic, which is vital to the inertial confinement fusion effort. Given the importance of these systems, a neutron-imaging design tool is being used to quantify the effects of aperture fabrication and alignment tolerances on reconstructed neutron images for inertial confinement fusion. The simulations indicate that alignment tolerances of more than 1 mrad would introduce measurable features in a reconstructed image for both pinholes and penumbral aperture systems. Simulated fabrication errors suggest that penumbral apertures are several times less sensitive to these errors than pinhole apertures