From Event: SPIE Optical Engineering + Applications, 2018
Neutron imagers based on thick apertures have become important diagnostics for the shape and size of the burning and cold fuel regions of inertial confinement fusion sources for high-energy density physics. Over time, the designs of these apertures have changed to meet the requirements of newer sources and taken advantage of improvements in manufacturing and alignment technology. In this paper, we discuss the evolution of thick apertures for neutron imaging at laser-driven ICF facilities. We describe the parameters that define the apertures and the apertures that have been fabricated and fielded. We also discuss the lessons learned with each iteration. We also discuss the impact that added features such as collinear or near-collinear γ-ray and x-ray imaging systems have had on the designs of the aperture arrays.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Valerie E. Fatherley, David N. Fittinghoff, Verena Geppert-Kleinrath, Gary P. Grim, H. Justin Jorgenson, John A. Oertel, Derek W. Schmidt, Petr L. Volegov, and Carl Wilde, "Evolution of the neutron imaging aperture," Proc. SPIE 10763, Radiation Detectors in Medicine, Industry, and National Security XIX, 107630Q (Presented at SPIE Optical Engineering + Applications: August 23, 2018; Published: 18 September 2018); https://doi.org/10.1117/12.2322782.