Quantitative Radiography: Submicron Dimension Calibration for ICF Ablator Shell Characterization; GA-A25660

[2], 6 pages. Illustrations. References. This is a preprint of a paper presented at the 17th Target Fabrication Specialist Meeting, San Diego, California on October 1-5, 2006 and to be published in Fusion Science and Technology. This is part of General Atomics Project 30272. General Atomics is an American energy and defense corporation headquartered in San Diego, California, specializing in research and technology development. This includes physics research in support of nuclear fission and nuclear fusion energy. The company also provides research and manufacturing services for remotely operated surveillance aircraft, including the Predator drones; airborne sensors; and advanced electric, electronic, wireless, and laser technologies. National Ignition Facility (NIF) ignition target specifications require submicron dimensional measurement accuracy for the spherical ablator shell, which requires the proper corrections of various distortions induced by the imaging lens, the point projection geometry, and x-ray refraction. The procedures we developed allow measurement accuracies of 0.5 m for the capsule diameter, ±0.2 m for the out-of-round (which is the amplitude of the radius variations), ±0.3 fan for the wall thickness (including each sub-layer), and ±0.1 m for wall thickness profile. Presumed First Edition, First printing thus [Conference Preprint].…