@Henning, glad we’re on the same page except for possibly the laminating. That might work on the outer layers, building inward toward the plasmoid. I’m still thinking CVD building outwards, but that’s not the only way possible.
My key concern is that the patent reads that the onion’s radial cooling passages are most likely only going to be a few degrees apart- i.e.- a complete onion would need around 180 slats to provide the electrical conversion, cooling, and mechanical support. And those cooling channels are very narrow.
Supposing that each X-ray energy band can be converted using 10 to 100 foils (each a different thickness), and a multi MW onion would require several of these slats stacked vertically/ radially, I’m having problems visualizing how to cool, support, and wire a commercial onion without building at least the stacks at the molecular or even atomic level using automated machinery.
Put another way, a research machine could test over 100 slat designs on a monthly robo-building schedule in a networked lab environment. Something like Edison’s 1,000 experiments managed in a series/parallel manner rather than his serial model.